Patent Application
20240248235
Oilfield exploration and production efforts generally include collecting data that represents a subsurface volume of interest, and then modeling the physical characteristics of the subsurface volume based on the data. There are many sources for such data, including seismic surveys and well logs. This data permits complex models to be built, which may depict the geology of the subsurface volume, fluid migration over time in the volumes, and other aspects. Because of the high complexity of the models, even with extensive computing resources, it can take hours or even days to build and simulate conditions in the models. Thus, when the physical characteristics of the subsurface volume change, or when simulating different operating conditions in the model, solving such models can present significant delays.
Accordingly, refining and rebuilding models is frequently done in the exploration and well planning setting, where time and resources are focused on making accurate and precise determinations of where and how to drill a well. The pace of advancement at this stage can be slow, and thus there is both time available and upfront benefit to updating and running the models, prior to drilling.
At the production stage, the models can be helpful in determining operating parameters (e.g., choke positions, injection rates, etc.), but the delay and expense incurred by running the models is frequently too high. Thus, operators tend to make rough estimations for the parameters, based largely on approximations and calculations that use a small sampling of the total available data. Further, these techniques may rely on input and output measurements, without analysis of the factors (e.g., geology) that lead to the output from the input, or the potential for these factors to change. Thus, for example, in a waterflooding context, operators may consider combinations of injection rates and production rates from injection and production wells, respectively, in a given field, and make determinations based on those measurements. Relatively little consideration may be given to the geology of the field, since accounting for the geology generally calls for an accurate model, and accurately modeling the geology and simulating the fluid flow is too costly and slow to be performed with sufficient frequency (e.g., daily) to keep up with the acquisition of new data.
Accordingly, there would be a benefit to systems and methods that permit accurately modeling the subsurface, including the geology, and which are quick enough to be used and updated during operations.
Embodiments of the disclosure include method including training a proxy model to predict output from a reservoir model of a subterranean volume, receiving data representing an oilfield operation performed at least partially in the subterranean volume, predicting one or more performance indicators for the oilfield operation using the proxy model, and updating the reservoir model based at least in part on the one or more performance indicators predicted in the proxy model.
Embodiments of the disclosure include a computing system including one or more processors, and a memory storing instructions that, when executed by at least one of the one or more processors, cause the computing system to perform operations including training a proxy model to predict output from a reservoir model of a subterranean volume, receiving data representing an oilfield operation performed at least partially in the subterranean volume, predicting one or more performance indicators for the oilfield operation using the proxy model, and updating the reservoir model based at least in part on the one or more performance indicators predicted in the proxy model.
Embodiments of the disclosure include a non-transitory computer-readable medium storing instructions that, when executed by at least one processor of a computing system, cause the computing system to perform operations, the operations including training a proxy model to predict output from a reservoir model of a subterranean volume, receiving data representing an oilfield operation performed at least partially in the subterranean volume, predicting one or more performance indicators for the oilfield operation using the proxy model, and updating the reservoir model based at least in part on the one or more performance indicators predicted in the proxy model.
Thus, the computing systems and methods disclosed herein are more effective methods for processing collected data that may, for example, correspond to a surface and a subsurface region. These computing systems and methods increase data processing effectiveness, efficiency, and accuracy. Such methods and computing systems may complement or replace conventional methods for processing collected data. This summary is provided to introduce a selection of concepts that are further described below in the detailed description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in limiting the scope of the claimed subject matter.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present teachings and together with the description, serve to explain the principles of the present teachings. In the figures:
Embodiments of the present disclosure may provide a system and method for controlling oilfield operations, e.g., production operations such as waterflooding. For example, the systems and methods may provide for evaluation of performance of the ongoing production operations, so as to identify and implement field-actions that increase efficiency. The system may connect engineering evaluations with the reservoir models in an on-time or real-time basis. Further, the system updates and accesses reservoir model(s) automatically. Embodiments also include an analyser system that includes data and engines for storage and management of static and dynamic data, models, and computational engines such as reservoir simulators. Further, systems and methods for agile reservoir modelling for creating, updating, calibrating, and executing reservoir simulation model related to the ongoing waterflooding is disclosed. Artificial intelligence (AI) driven enhancements for creating and updating machine learning (ML) driven proxy models, are also disclosed. Systems and methods for translating and communicating the reservoir model outcomes to the operation management are also provided. Further, surveillance, operation management and decision dashboards for visualization of decisions, performance indicators, results, etc., are provided.
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings and figures. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to one of ordinary skill in the art that the invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, circuits, and networks have not been described in detail so as not to unnecessarily obscure aspects of the embodiments.
It will also be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first object or step could be termed a second object or step, and, similarly, a second object or step could be termed a first object or step, without departing from the scope of the present disclosure. The first object or step, and the second object or step, are both, objects or steps, respectively, but they are not to be considered the same object or step.
The terminology used in the description herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used in this description and the appended claims, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term “and/or” as used herein refers to and encompasses any possible combinations of one or more of the associated listed items. It will be further understood that the terms “includes,” “including,” “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, as used herein, the term “if” may be construed to mean “when” or “upon” or “in response to determining” or “in response to detecting,” depending on the context.
Attention is now directed to processing procedures, methods, techniques, and workflows that are in accordance with some embodiments. Some operations in the processing procedures, methods, techniques, and workflows disclosed herein may be combined and/or the order of some operations may be changed.
In the example of
In an example embodiment, the simulation component 120 may rely on entities 122. Entities 122 may include earth entities or geological objects such as wells, surfaces, bodies, reservoirs, etc. In the system 100, the entities 122 can include virtual representations of actual physical entities that are reconstructed for purposes of simulation. The entities 122 may include entities based on data acquired via sensing, observation, etc. (e.g., the seismic data 112 and other information 114). An entity may be characterized by one or more properties (e.g., a geometrical pillar grid entity of an earth model may be characterized by a porosity property). Such properties may represent one or more measurements (e.g., acquired data), calculations, etc.
In an example embodiment, the simulation component 120 may operate in conjunction with a software framework such as an object-based framework. In such a framework, entities may include entities based on pre-defined classes to facilitate modeling and simulation. A commercially available example of an object-based framework is the MICROSOFT© .NET© framework (Redmond, Washington), which provides a set of extensible object classes. In the .NET© framework, an object class encapsulates a module of reusable code and associated data structures. Object classes can be used to instantiate object instances for use in a program, script, etc. For example, borehole classes may define objects for representing boreholes based on well data.
In the example of
As an example, the simulation component 120 may include one or more features of a simulator such as the ECLIPSE™ reservoir simulator (Schlumberger Limited, Houston Texas), the INTERSECT™ reservoir simulator (Schlumberger Limited, Houston Texas), etc. As an example, a simulation component, a simulator, etc. may include features to implement one or more meshless techniques (e.g., to solve one or more equations, etc.). As an example, a reservoir or reservoirs may be simulated with respect to one or more enhanced recovery techniques (e.g., consider a thermal process such as SAGD, etc.).
In an example embodiment, the management components 110 may include features of a commercially available framework such as the PETREL© seismic to simulation software framework (Schlumberger Limited, Houston, Texas). The PETREL© framework provides components that allow for optimization of exploration and development operations. The PETREL© framework includes seismic to simulation software components that can output information for use in increasing reservoir performance, for example, by improving asset team productivity. Through use of such a framework, various professionals (e.g., geophysicists, geologists, and reservoir engineers) can develop collaborative workflows and integrate operations to streamline processes. Such a framework may be considered an application and may be considered a data-driven application (e.g., where data is input for purposes of modeling, simulating, etc.).
In an example embodiment, various aspects of the management components 110 may include add-ons or plug-ins that operate according to specifications of a framework environment. For example, a commercially available framework environment marketed as the OCEAN© framework environment (Schlumberger Limited, Houston, Texas) allows for integration of add-ons (or plug-ins) into a PETREL© framework workflow. The OCEAN© framework environment leverages .NET© tools (Microsoft Corporation, Redmond, Washington) and offers stable, user-friendly interfaces for efficient development. In an example embodiment, various components may be implemented as add-ons (or plug-ins) that conform to and operate according to specifications of a framework environment (e.g., according to application programming interface (API) specifications, etc.).
As an example, a framework may include features for implementing one or more mesh generation techniques. For example, a framework may include an input component for receipt of information from interpretation of seismic data, one or more attributes based at least in part on seismic data, log data, image data, etc. Such a framework may include a mesh generation component that processes input information, optionally in conjunction with other information, to generate a mesh.
In the example of
As an example, the domain objects 182 can include entity objects, property objects and optionally other objects. Entity objects may be used to geometrically represent wells, surfaces, bodies, reservoirs, etc., while property objects may be used to provide property values as well as data versions and display parameters. For example, an entity object may represent a well where a property object provides log information as well as version information and display information (e.g., to display the well as part of a model).
In the example of
In the example of
As mentioned, the system 100 may be used to perform one or more workflows. A workflow may be a process that includes a number of worksteps. A workstep may operate on data, for example, to create new data, to update existing data, etc. As an example, a workflow may operate on one or more inputs and create one or more results, for example, based on one or more algorithms. As an example, a system may include a workflow editor for creation, editing, executing, etc. of a workflow. In such an example, the workflow editor may provide for selection of one or more pre-defined worksteps, one or more customized worksteps, etc. As an example, a workflow may be a workflow implementable in the PETREL® software, for example, that operates on seismic data, seismic attribute(s), etc. As an example, a workflow may be a process implementable in the OCEAN® framework. As an example, a workflow may include one or more worksteps that access a module such as a plug-in (e.g., external executable code, etc.).
The method 200 may include receiving data representing a subterranean volume of interest (e.g., a reservoir), as at 202. The data, as noted above, may be collected from a variety of sources, including seismic surveys, well logs, core samples, LiDAR surveys, satellite imagery, gravity surveys, etc. The data may represent the subterranean volume in that it provides information that can be used to calculate or estimate one or more physical characteristics of the volume.
Accordingly, based on the data, a numerical, physics-based model (e.g., a reservoir model) of the subterranean volume of interest may be constructed, as at 204. For example, the reservoir model incorporates a geological model obtained from a database. The reservoir model may be configured to simulate fluid flow (or any other physical process) in the volume of interest, based on the dynamics of the fluid flow, the geology of the volume, and any other relevant factors. The model is referred to as “physics-based” because it relies on physics to yield outputs, e.g., it organizes and permits modeling of a multiphase fluid flow through calculation of equations of state, fluid dynamics, etc. Thus, the output may be calculated (e.g., deterministically) from the input parameters.
The method 200 may also include training a proxy model to predict model outputs, as at 206. The proxy model is created based on the numerical reservoir model, which has been calibrated to historical performance, and may be a surrogate for the reservoir model. Multiple realizations of the reservoir model may be employed to build and train the proxy model, for example, tens or thousands of runs. The data obtained from the numerical model is used to train the proxy model. Various different algorithms may be used in the proxy model, for example, artificial numerical network (ANN), or another type of machine learning model.
In some embodiments, the proxy model may be validated, as at 207. This may be done, for example, by analyzing the confidence levels of the outputs of the proxy model (e.g., a numerical measure provided by the model, which measures how likely the prediction is to be accurate, based on the machine learning model's training and composition), comparing the proxy model outputs to the reservoir model outputs (e.g., model realizations not used to train the proxy model), etc. If the proxy model is validated, e.g., based upon relatively high confidence levels and relatively high correlations between proxy model outputs and reservoir model outputs, the method 200 may continue. If it is not, the method 200 may, in some embodiments, return to training the proxy model, e.g., by providing additional training data thereto.
The method 200 may further include receiving new data representing an operation in the subterranean volume of interest, as at 208. The new data may be received on a continuous basis, e.g., roughly hourly, daily, monthly, etc. It may be desirable to understand the impact the new data has on the reservoir model outputs, without having to expend the time and resources to simulate the reservoir model. Continuing with the example of waterflooding, the data may be injection rates/pressures, choke positions, production rates/pressures, changes in geological conditions, etc. For example, in the example of waterflooding, waterflood pattern balancing can be performed, e.g., executed daily by accessing daily injection and production rates.
The method 200 may then include predicting the reservoir model outputs, in view of (incorporating) the new data, using the trained proxy model, as at 210. Continuing with the waterflood operation example, given the injection pressures, the trained proxy model may predict the production rate from individual production wells (or as a whole). Additionally, the proxy model may predict injection schemes that enhance production under set of constraints, such as bottom hole pressures and reservoir pressures.
The proxy model may call for shorter runtimes, as compared to a complete numerical simulation of the reservoir model, to predict conditions in the subterranean domain. For example, the proxy model generally recognizes patterns, while running the reservoir model may call for many (e.g., millions) of mathematical calculations. Thus, the proxy model can be run more frequently (e.g., daily) than the reservoir model, which may be run monthly, for example. Accordingly, the expected outputs of the reservoir model, e.g., within a calculated value for confidence (or uncertainty), can be predicted using the proxy model and without running the reservoir model. The outputs may be employed to determine performance indicators related to the operation being conducted. Specific examples of such performance indicators include conformance, voidage replacement, maps (e.g., traffic light maps), operation efficiency, curve-fitting, etc.
The method 200 may include selecting an operating parameter for the operations, e.g., based on the predictions from the proxy model, as at 212. For example, the performance indicators can be displayed to users, who can, potentially without having expertise in operating the underlying reservoir model, make determinations as to operating parameter values (e.g., choke positions, injection rates, etc.). In some embodiments, the proxy model can be trained to make the operating parameter determinations and either recommend them or implement them automatically.
The method 200 may also include feeding the changed operating parameters back to the proxy model, as shown by the arrow extending from box 212 back to 208. For example, the implemented operating parameter adjustments may result in different conditions in the oilfield. The reservoir model, were it to be updated at this point, may take such changes into consideration. Thus, the proxy model, to accurately predict the outputs of the reservoir model, may also consider these changed conditions created by adjusted operating parameters. The sequence described above may then proceed again, with the proxy model again providing predictions/recommendations of operating parameters (and/or implementing the operating parameters by automatically adjusting equipment in the production system).
Periodically, the reservoir model may be updated, as at 214. That is, the data collected in the field may be fed to the reservoir model, which may then update its representation of the subterranean volume and the processes that occur therein. The reservoir model may be updated less frequently than the proxy model. The updated reservoir model may then be employed to train the proxy model, as indicated by the arrow extending from box 214 to box 206.
An Artificial Intelligence (AI) Driven On-Time Flood Tuning module 404 (“tuning module 404”) may communicate with the reservoir modeling module 402. The tuning module 404 may be configured to implement the proxy model, as discussed above. The tuning module 404 may also implement field performance and analysis decision systems as well as provide continuous automated execution.
A variety of data sources are drawn upon to feed the reservoir modeling module 402 and the tuning module 404. These different data sources may be fed into the system 400 via a data and engine services module 406. The data and engine services module 406 may communicate directly with the modules 402, 404, as shown. The data sources may be received from production injection and surveillance feeds, as shown.
The system 400 may also implement an advisor module 408. The advisor module 408 may include a dashboard, which may display various “key” performance indicators (“KPIs”). These indicators, such as conformance, voidage, map-based indicators such as traffic lights, injection efficiency curves, and pressure-production plots, may be employed to inform decisions related to production operations, e.g., parameters, such as choke position and injection rates, among others.
More particularly, the dashboard may provide a comprehensive framework for display of decisions and supporting results. The in-depth analysis ensures confidence in the workflow. Examples of decision outcomes include recommended throughput, expected reservoir pressure, recommended injection rates for individual wells, recommended production rate for individual wells, and action items and status. The dashboard also hosts a list of plots associated with waterflood surveillance. Examples of surveillance plots include 2D/3D map of simulation computed saturation, pressures and streamlines, superposition of traffic lights on the above maps to represent anomalies. (e.g., injection efficiencies of injectors falling below a threshold or water cut of a producer exceeding a certain threshold), daily tracking of production indicators (data against simulation model output), production volume against target, injection volume against target, reservoir pressure against target, cumulative water injection volume, instantaneous VRR against target, water throughput rate against target, percentage of wells within operating envelope. Further, the dashboard can permit daily tracking of operational performance indicators such as injection plant uptime against target, oil in water and TSS against target, chemical injection rates against target, average oxygen content against target,
The tuning module 404 may be considered to include a “digital avatar” or replacement/supplement for a human, subject-matter expert or team of experts with reservoir management project experience. The module 404 may thus be a “digital” extension or addition to an operations team. With this addition, waterflood operators may have less numerical modeling and reservoir simulation expertise. Further, performance of the project with on-time connection to the reservoir model(s) may be enhanced. The module 404 may decide how the reservoir model should be utilized, based on the use-case for the operation room. In addition, the module 404 may coordinate the update and creation of new reservoir models and decision models. Once the model runs have completed the module 404 may translate the simulator output to a proxy model, also known as a decision model, that the operation room interacts with. The properties and the capabilities of the proxy model(s) may be predetermined for interaction with the operation room (e.g., fit for purpose modeling).
Accordingly, the model services 452 may employ a variety of possible models, including both an artificial intelligence/neural network proxy model and a reservoir model, as shown and discussed above. These two models, operating in parallel, may provide information related to the subsurface system conditions, by way of simulation, to the automation and AI 454. The automation and AI 454, executing the “digital avatar” as discussed above, may serve dual purposes. First, it may accept the data from the model services 452 and use it to produce waterflood (or any other type of system, e.g., infill planning) parameters to the physical system, in order to enhance the efficiency of on-going oilfield operations within the business process 458. The digital avatar may also track various performance indicators and other data against the measured data, thereby determining when to rebuild/retrain one of the model services 452 (e.g., based on a lowering of confidence/accuracy eventually indicating that a model is out of date).
The AI training module 508 may also receive reservoir simulation modeling of the subterranean system, as indicated at 512. Such modeling may be the output of physics-based models, which may be constructed and simulated based on the inputs 502. The AI training module 508 may thus update a proxy model 514 that represents the subterranean volume. As a result, when new inputs 502 are acquired, the proxy model can be updated by training and/or used to predict outputs 516 of the physics-based model, e.g., without simulating the physics-based model. As shown, by way of example, such outputs may include new injection rates and/or new production rates, based on the new inputs 502.
In addition, the tuning module 404 includes an analyzer 602. The analyzer 602 may also be part of the tuning module 404, and may convert well allocation factors (WAFs) and pattern flood management (PFM) into recommended actions, which may be visualized in the surveillance dashboard module 408, potentially along with other metrics and/or performance indicators. These performance indicators may be monitored and/or acted upon by an operations team of human users and/or employed to tune operating parameters of automated systems, e.g., based on receipt of production data 608 (e.g., the data and engine service module 406 of
The workflow 700 may include evaluating an integrity of the reservoir model 702. For example, the reservoir model may be employed to determine various outputs 704, such as property distribution integrity, aquifer representations, well perforation plots, modeling integrity, forecasting power, and any other metrics or parameters. The reservoir model may be reviewed for integrity, e.g., based on these factors. The evaluation of the reservoir may permit a determination of a confidence level for the model. For example, the model may be deemed fully reliable 706, partially representative 708 (e.g., in certain areas or for certain aspects, but not others), or unreliable 710, and thus rebuilt.
Once the reservoir model is validated for integrity, the workflow 700 may then include providing an AI-driven on-time flood “optimization” (e.g., enhancement, increase in accuracy/efficiency, etc.) 712 based on the reservoir model. For example, the workflow 700 may include providing a field performance analysis and decision system 714, which may review field performance data and make or suggest reservoir investigation decisions. The optimization 712 may also provide for continuous automated execution 716, which may prepare simulation instructions for new reservoir models (e.g., adjust parameters thereof). The optimization 712 may also provide automated proxy from simulation models, as at 718, which may convert model outputs for use in the operation room, and, e.g., into instructions for parameter adjustment of equipment in the field.
Embodiments of the present disclosure may provide a system for reservoir management, e.g., under waterflood. Confidence that the correct field operational actions are being carried out to increase the efficiency of the operations (e.g., waterflooding), efficient use of resources and production objectives for the field development. Further, the system may provide for surveillance, diagnostics and operational control of ongoing waterflood operations. Work of field development planning (e.g., waterflood design, infill well planning) is not connected to operational data and out of date. The system may also address issues with model building and selecting the right model for decisions, which can be slow and manual by providing an automated, machine-learning process.
In particular, embodiments of the present disclosure may provide representative models that preserve uncertainties in areas of lower confidence. Further, the reservoir models are “living” in that they are configured to be updated regularly. On-time adjustment may also be provided based on the decision or “proxy” model, which can complete evaluations in tens of seconds rather than hours or more.
In some embodiments, the methods of the present disclosure may be executed by a computing system.
A processor may include a microprocessor, microcontroller, processor module or subsystem, programmable integrated circuit, programmable gate array, or another control or computing device.
The storage media 806 may be implemented as one or more computer-readable or machine-readable storage media. Note that while in the example embodiment of
In some embodiments, computing system 800 contains one or more data avatar module(s) 808. In the example of computing system 800, computer system 801A includes the data avatar module 808. In some embodiments, a single data avatar estimation module may be used to perform some aspects of one or more embodiments of the methods disclosed herein. In other embodiments, a plurality of data avatar modules may be used to perform some aspects of methods herein.
It should be appreciated that computing system 800 is merely one example of a computing system, and that computing system 800 may have more or fewer components than shown, may combine additional components not depicted in the example embodiment of
Further, the steps in the processing methods described herein may be implemented by running one or more functional modules in information processing apparatus such as general purpose processors or application specific chips, such as ASICs, FPGAs, PLDs, or other appropriate devices. These modules, combinations of these modules, and/or their combination with general hardware are included within the scope of the present disclosure.
Computational interpretations, models, and/or other interpretation aids may be refined in an iterative fashion; this concept is applicable to the methods discussed herein. This may include use of feedback loops executed on an algorithmic basis, such as at a computing device (e.g., computing system 800,
The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or limiting to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings. Moreover, the order in which the elements of the methods described herein are illustrate and described may be re-arranged, and/or two or more elements may occur simultaneously. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the disclosed embodiments and various embodiments with various modifications as are suited to the particular use contemplated.
This application claims priority to U.S. Provisional Patent Application having Ser. No. 63/202,113, which was filed on May 27, 2021 and is incorporated herein by reference in its entirety.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2022/072616 | 5/27/2022 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 63202113 | May 2021 | US |
