Foam scrubbing agent used for water drainage and gas collection of water-production gas well containing H2S gas

A technology for drainage and gas extraction and foam removal, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems such as the performance of foam removal agent decreasing, restricting the application of foam drainage and gas extraction, and achieves high foaming properties. , has the effect of environmental friendliness and low irritation

Active Publication Date: 2015-09-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These foaming agents contain H 2 The performance of S gas in the gas reservoir is obviously reduced, which seriously restricts the foam drainage gas recovery process in the gas containing H 2 Application of S gas in water producing gas reservoir

Method used

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  • Foam scrubbing agent used for water drainage and gas collection of water-production gas well containing H2S gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example provides a method for containing H 2 Foaming agent for water drainage and gas recovery of S gas production wells.

[0025] In terms of mass percentage, the raw material composition of the foaming agent includes: 20% sodium fatty alcohol polyoxyethylene ether sulfate, 30% cocamidopropyl betaine, 10% sodium α-olefin sulfonate and 40% deionized water .

[0026] The preparation method of this foam discharge agent comprises the following steps:

[0027] a. Slowly add fatty alcohol polyoxyethylene ether sodium sulfate and cocamidopropyl betaine into a stainless steel reaction kettle, then add solvent (deionized water) to obtain a mixed solution, heat the mixed solution to 45°C, and stir at a low speed 15min;

[0028] b. Slowly add sodium α-olefin sulfonate to the above mixed solution, and continue to stir at a low speed for 10 minutes to obtain the foam discharge agent WJ-1.

Embodiment 2

[0030] This example provides a method for containing H 2 Foaming agent for water drainage and gas recovery of S gas production wells.

[0031] In terms of mass percentage, the raw material composition of the foaming agent includes: 28% sodium fatty alcohol polyoxyethylene ether sulfate, 35% cocamidopropyl betaine, 14% sodium α-olefin sulfonate and 23% deionized water .

[0032] The preparation method of this foam discharge agent comprises the following steps:

[0033] a. Slowly add fatty alcohol polyoxyethylene ether sodium sulfate and cocamidopropyl betaine into a stainless steel reaction kettle, then add solvent (deionized water) to obtain a mixed solution, heat the mixed solution to 45°C, and stir at a low speed 15min;

[0034] b. Slowly add sodium α-alkenyl sulfonate to the above mixed solution, and continue to stir at a low speed for 10 minutes to obtain foam discharge agent WJ-2.

Embodiment 3

[0036] In this embodiment, the foam discharge agent WJ-1 provided in the above-mentioned embodiment 1 is treated at different H 2 The initial foaming volume V under the conditions of S concentration, temperature and salinity 0 , foam half-life t 1 / 2 And the liquid carrying capacity of 15min when the gas flow is 5L / min was tested.

[0037] The instrument used in the test of this embodiment is a high-temperature and high-pressure foam evaluation instrument (this high-temperature and high-pressure foam evaluation instrument is the high-temperature and high-pressure foam evaluation instrument recorded in the utility model patent of Patent No. ZL201120400940.1, and the announcement number is CN202228059U); After analysis based on water produced from natural gas wells on site, NaCl, CaCl 2 , MgCl 2 , KCl, Na 2 SO 4 , NaHCO 3 Prepared; the foaming agent solution used in the test was obtained by dissolving the foaming agent provided in Example 1 in simulated formation water; in ...

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Abstract

The present invention provides a foam scrubbing agent used for water drainage and gas collection of a water-production gas well containing H2S gas. The foam scrubbing agent included the following raw materials: 10-30% of an anionic-nonionic surfactant, 20-40% of a zwitterionic surfactant, 5-15% of an anionic surfactant and balance of deionized water. The present invention also provides a preparation method of the foam scrubbing agent, and the preparation method is as follows: the anionic-nonionic surfactant and the zwitterionic surfactant are added into a stainless steel reaction kettle in one time, and the deionized water is added to obtain a liquid mixture, the liquid mixture is heated to 40-50 DE GC, and stirred, the anionic surfactant is slowly added into the liquid mixture, and stirred to obtain the foam scrubbing agent. The foam scrubbing agent can good foaming characteristic and foam stabilization characteristic in formation water dissolved with the H2S gas.

Description

technical field [0001] The present invention relates to a kind of for containing H 2 The invention discloses a foaming agent for water-producing gas well drainage and gas recovery of S gas and a preparation method thereof, belonging to the field of petroleum and natural gas exploitation. Background technique [0002] At present, most of the gas wells in my country have entered the middle and late stages of development. Due to the reduction of formation pressure, the water-producing gas wells have serious fluid accumulation at the bottom and in the wellbore due to insufficient liquid-carrying capacity, resulting in reduced production or even stop blowout of gas wells. The foam drainage gas recovery process has been widely used in the gas recovery industry because of its simple equipment, strong adaptability, and low cost. The so-called foam drainage gas recovery process is to inject a certain amount of foam drainage agent into the production well with insufficient liquid-car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 武俊文熊春明雷群张建军曹光强李隽王云贾敏李楠刘岩何春艳
Owner PETROCHINA CO LTD
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