A method of treating a well that includes selectively emplacing a fluid loss pill into the well, wherein the fluid loss pill includes at least one of diethylene glycol, triethylene glycol, and tetraethylene glycol, and wherein the at least one of diethylene glycol, triethylene glycol, and tetraethylene glycol reacts with a calcium brine present in the well to form a plug is disclosed.
Description
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is an x-ray diffraction spectrum of a solid formed according to one embodiment disclosed herein.
Claims
1. A method of treating a well, comprising:
selectively emplacing a fluid loss pill into the well, wherein the fluid loss pill comprises at least one of diethylene glycol, triethylene glycol, and tetraethylene glycol, and wherein the at least one of diethylene glycol, triethylene glycol, and tetraethylene glycol reacts with a calcium brine present in the well to form a plug.
2. The method of claim 2, wherein the calcium brine comprises at least one of CaCl2 and CaBr2.
3. The method of claim 1, wherein the well comprises at least one problematic hydrocarbon-containing zone and at least one non-problematic zone, and wherein the selective emplacing comprises emplacing the fluid loss pill at the at least one non-problematic zone.
4. The method of claim 1, wherein the plug comprises a product of a reaction between calcium ions and glycol.
5. The method of claim 1, further comprising:
injecting a breaker fluid into the well, the breaker fluid comprising at least one of EDTA, DTPA, TTHA, PDTA, 1-phenylethylenediamine tetraacetic acid, 3,3-dimethylbutane-1,2-diamine tetraacetic acid, 1,2,3-triaminopropane hexaacetic acid, trimethylenediamine tetraacetic acid, NTA, 1,2-cyclohexadiamine tetraacetic acid, glycol ethylenediamine tetraacetic acid, tetralin-2,3-diamine tetraacetic acid, decalin-2,3-diamine tetraacetic acid, cyclohexane 1,2-diamine tetraacetic acid, cyclohexane-1,3-diamine tetraacetic acid, cyclohexane-1,4-diamine tetraacetic acid, GLDA, APhthDA, and salts thereof.
6. The method of claim 7, further comprising:
removing the plug from the well.
7. The method of claim 1, further comprising:
drilling the well with the calcium brine.
8. The method of claim 1, further comprising:
injecting the calcium brine into the well prior to the selective emplacing the fluid loss pill.
9. The method of claim 8, further comprising:
injecting additional calcium brine into well after the selective emplacement of the fluid loss pill; andselectively emplacing an additional fluid loss pill into the well, wherein the additional fluid loss pill comprises at least one of diethylene glycol, triethylene glycol, and tetraethylene glycol.
10. A method of treating a well, comprising:
selectively emplacing a fluid loss pill into the well, wherein the fluid loss pill comprises at least one of diethylene glycol, triethylene glycol, and tetraethylene glycol, and wherein the at least one of diethylene glycol, triethylene glycol, and tetraethylene glycol reacts with a calcium brine present in the well to form a plug, wherein the calcium brine comprises at least one of CaCl2 and CaBr2.
11. The method of claim 10, wherein the well comprises at least one problematic hydrocarbon-containing zone and at least one non-problematic zone, and wherein the selective emplacing comprises emplacing the fluid loss pill at the at least one non-problematic zone.
12. The method of claim 10, further comprising:
injecting a breaker fluid into the well, the breaker fluid comprising at least one of EDTA, DTPA, TTHA, PDTA, 1-phenylethylenediamine tetraacetic acid, 3,3-dimethylbutane-1,2-diamine tetraacetic acid, 1,2,3-triaminopropane hexaacetic acid, trimethylenediamine tetraacetic acid, NTA, 1,2-cyclohexadiamine tetraacetic acid, glycol ethylenediamine tetraacetic acid, tetralin-2,3-diamine tetraacetic acid, decalin-2,3-diamine tetraacetic acid, cyclohexane 1,2-diamine tetraacetic acid, cyclohexane-1,3-diamine tetraacetic acid, cyclohexane-1,4-diamine tetraacetic acid, GLDA, APhthDA, and salts thereof.
13. A composition obtained by mixing calcium brine and at least one of diethylene glycol, triethylene glycol, and tetraethylene glycol, wherein the calcium brine comprises at least one of CaBr2 and CaCl2.
Patent Application
20070213233
