Foaming agent for drainage and gas recovery containing diaryl sulfonate

A technology of aliphatic diaryl sulfonate and aryl sulfonate, which is applied in the direction of mining fluid, earthwork drilling, and drilling composition, and can solve the problem of drainage and gas recovery that cannot meet the needs of high-temperature and high-salinity gas wells , Poor thermal stability of the foaming agent and other issues, to achieve the effect of strong foaming performance and good foam stabilizing performance

Active Publication Date: 2019-07-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the foaming agent in the prior art has poor thermal stability, and when it encounters divalent ion precipitation, it cannot meet the technical problem of high temperature and high salinity gas well drainage and gas production. Foaming agent for aryl sulfonate gas well drainage and gas recovery

Method used

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  • Foaming agent for drainage and gas recovery containing diaryl sulfonate
  • Foaming agent for drainage and gas recovery containing diaryl sulfonate
  • Foaming agent for drainage and gas recovery containing diaryl sulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In terms of mass percent, get sodium dodecyl diphenyl ether sulfonate X (wt%), lauric acid amidopropyl betaine Y (wt%), Southwest oil field formation simulation water 1, stir 30 minutes, obtain required Foaming agent. The ion content of formation simulation water 1 in Southwest Oilfield is shown in Table 1. Under the condition of 75°C water bath, the foaming volume and foam half-life of the foam discharge agent were measured by Ross-Miles method, and the results are shown in Table 2.

[0038] Table 1

[0039] name Na +

Mg 2+

Ca 2+

Cl -

total salinity Content (mg / L) 8109 50 926 13915 23000

[0040] Table 2

[0041] X (wt%) 0.03 0.06 0.09 0.12 Y (wt%) 0.17 0.14 0.11 0.08 Bubble volume (mL) 410 420 400 390 Foam half-life (s) 800 1560 1250 700

Embodiment 2

[0043] Take the foam discharge agent in [Example 1] and put it into a pressure bomb, put it into an oven, and take it out after aging at 100°C for 30 days. Under the condition of a water bath at 75°C, use the Ross-Miles method to measure the foam discharge agent after aging. The foam volume and foam half-life are shown in Table 3.

[0044] table 3

[0045] X (wt%) 0.03 0.06 0.09 0.12 Y (wt%) 0.17 0.14 0.11 0.08 Bubble volume (mL) 400 410 400 380 Foam half-life (s) 720 1340 1190 620

Embodiment 3

[0047] In terms of mass percentage, get sodium dodecyl diphenyl ether sulfonate X (wt%), lauryl amidopropyl betaine Y (wt%), Southwest Oilfield formation simulation water 2, stir for 30 minutes, obtain required foam Discharge agent. The ion content of formation simulation water 2 in Southwest Oilfield is shown in Table 4. Under the condition of 75°C water bath, the foam volume and foam half-life of the foam discharge agent were measured by Ross-Miles method, and the results are shown in Table 5.

[0048] Table 4

[0049] name Na +

Mg 2+

Ca 2+

Cl -

total salinity Content (mg / L) 58310 500 3500 97690 160000

[0050] table 5

[0051] X (wt%) 0.03 0.06 0.09 0.12 Y (wt%) 0.17 0.14 0.11 0.08 Bubble volume (mL) 470 420 410 400 Foam half-life (s) 800 1056 730 640

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Abstract

The invention relates to a drainage gas recovery foam scrubbing agent containing diarylsulphonate. The technical problems that foaming agents are poor in thermal stability, precipitate when meeting divalent ions, and cannot meet the drainage gas recovery requirement of high temperature and high mineralization degree gas wells in the prior art are mainly solved through the drainage gas recovery foam scrubbing agent containing the diarylsulphonate. According to the technical scheme, the drainage gas recovery foam scrubbing agent containing the diarylsulphonate comprises, by mass, 0.01-5 parts of fatty diaryl sulphonate and 0.01-5 parts of fatty amido alkyl betaine, so that the problems are well solved. The drainage gas recovery foam scrubbing agent containing the diarylsulphonate can be used for large-scale application on drainage gas recovery sites.

Description

technical field [0001] The invention relates to a diarylsulfonate-containing foaming agent for drainage and gas recovery. Background technique [0002] During the development of natural gas wells, due to the advancement of edge water, water injection drive, fracturing and other operational measures, water will continue to accumulate in the wellbore, resulting in a decrease in gas production and even crushing the gas well. [0003] At present, the common methods for removing liquid accumulation from natural gas wells in oil and gas fields at home and abroad include foam drainage method and liquid nitrogen method. When repairing dead wells, the effect of using liquid nitrogen method is better, but the liquid nitrogen method requires a professional operation team and the cost is very high. The foam drainage method is a drainage and gas recovery technology developed rapidly in recent years, and has been widely used in the gas recovery industry at home and abroad. It utilizes t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584E21B43/22
CPCC09K8/584E21B43/16
Inventor 吴春芳沈之芹何秀娟裘鋆吴国英
Owner CHINA PETROLEUM & CHEM CORP
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