Foam discharging agent used for drainage gas recovery in high-temperature water-producing gas well

A technology of drainage gas recovery and foam discharge agent, which is applied in the directions of drilling composition, chemical instrument and method, etc., can solve the problems of poor performance of foam discharge agent, high temperature of gas layer, affecting the effect of foam drainage and gas recovery, etc. , to achieve the effect of good coordination, easy degradation and easy access

Active Publication Date: 2010-12-01
DAQING OILFIELD CO LTD +1
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Problems solved by technology

However, in some gas fields, the temperature of the volcanic rock gas reservoir is high (104-149°C), which leads to a shar

Method used

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  • Foam discharging agent used for drainage gas recovery in high-temperature water-producing gas well
  • Foam discharging agent used for drainage gas recovery in high-temperature water-producing gas well
  • Foam discharging agent used for drainage gas recovery in high-temperature water-producing gas well

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Experimental program
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Embodiment Construction

[0009] The present invention will be further described below in conjunction with embodiment:

[0010] Prepare several different foaming agents for performance experiments: Scheme 1: Cocamidopropyl Betaine 35%, Lauroyl Sarcosine 20% and Water 45%; Scheme 2: Cocoamidopropyl Betaine 30%, Lauroyl Sarcosine 25% and Water 45%. The above-mentioned components are calculated by mass percentage.

[0011] The foaming power, thermal stability, dynamic water-carrying capacity and formation water compatibility of the foam drainage agent are important parameters for evaluating its performance. Refer to the SY / T 6450-2000 "Evaluation Method for Foaming Agents for Foam Drainage Gas Recovery" standard, See Table 1 and Table 2 for the performance parameters of the foam discharge agent.

[0012] Evaluation of foaming power, thermal stability and liquid-carrying ability Table 1

[0013] prepare

water type

concentration

(%)

Ageing

temperature

...

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Abstract

The invention relates to a foam discharging agent used for drainage gas recovery in a high-temperature water-producing gas well. The foam discharging agent comprises the following components in percentage by weight: 25-40% of cocamidopropyl betaine, 20-30% of sodium lauroyl sarcosine and the balance of water. The foam discharging agent has favorable foaming power, thermal stability and liquid-carrying capacity under the condition that the bottom hole temperature is 150 DEG C, has the characteristic of low acrimony, low toxicity and easy degradation, has easily obtained raw materials with moderate cost, and is favor for on-site scale application.

Description

Technical field: [0001] The invention relates to a chemical additive used in the field of oil and gas fields, in particular to a foaming agent used for drainage and gas recovery of high-temperature water-producing gas wells. Background technique: [0002] In the initial stage of gas field development, gas wells generally see water. Due to the decline of liquid carrying capacity, fluid accumulation at the bottom of the well leads to production reduction or even stop blowing of gas wells. The bubble drainage process has the characteristics of strong adaptability, little influence by acid gas corrosion, and low cost, and is suitable for drainage of gas wells with deep layers, high temperature, and small water production in gas fields. At present, the application temperature of foam discharge agent in China does not exceed 120°C. However, in some gas fields, the temperature of the gas layer in the volcanic gas reservoir is high (104-149°C), which leads to a sharp deterioration ...

Claims

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Application Information

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IPC IPC(8): C09K8/06
Inventor 张永平朱振锐高纯良马品刚马文海翟庆红宁凡哲
Owner DAQING OILFIELD CO LTD
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