BRIEF DESCRIPTION OF THE DRAWINGS
For a more complete understanding of the features and advantages of the present invention, reference is now made to the detailed description of the invention along with the accompanying figures and in which:
FIG. 1 is a schematic illustration of an exemplary embodiment of an offshore oil and gas platform operating an apparatus for progressively treating a zone of a wellbore according to the present invention;
FIG. 2 is a cross-section view of an exemplary embodiment of a production zone at the wellbore next to a graph that describes the problem associated with the productivity of gas-condensate wells;
FIG. 3 is a graph that depicts a calculated near-wellbore condensate saturation;
FIG. 4 is a schematic of core flood set-up used for the Examples;
FIG. 5 is a graph that illustrates pressure drop data observed across different sections and the total length of the core as the process of condensate accumulation occurred in Example 4;
FIG. 6 is a graph that depicts the pressure drop in the core for Example 4 during dynamic condensate accumulation at 1,500 psig and 250° F. at different flow rates ranging from 330 cc/hr to 2637 cc/hr;
FIG. 7 is a graph that depicts the pressure drop across the reservoir core A, for dynamic condensate accumulation at 1,500 psig and 275° F. at flow rates ranging from 1389 cc/hr to 3832 cc/hr for Example 10;
FIG. 8 is graph that depicts the pressure drop in a Berea sandstone core during dynamic condensate accumulation at 1,500 psig and 250° F. before and after Example 4 treatment;
FIG. 9 is graph that depicts the effect of water concentration in the various compositions (i.e., Examples 1-9 and Comparative Examples A-C) on the gas relative permeability after treatment;
FIG. 10 is a graph that depicts shows the effect of treatment flow rate on the relative permeability after treatment with the compositions at different temperatures; and
FIG. 11 is a graph that depicts the durability of the Example 9 composition.
Patent Application
20070225176
