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Method of Drainage and Gas Recovery Using High Temperature and Anti-acid Foam Drainage Agent

A foam drainage agent, water drainage and gas recovery technology, applied in chemical instruments and methods, mining fluids, earth drilling and production, etc., can solve the problems that cannot be solved such as production reduction or even stop spraying of high temperature ultra-deep gas wells, poor high temperature resistance

Active Publication Date: 2021-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing foam drainage agent has poor high temperature resistance in acidic environment, and cannot solve the problem of production reduction or even stop spraying caused by liquid accumulation in high temperature ultra-deep gas wells. Foam drainage agent is a method of drainage and gas recovery, which is applied to high-temperature deep wells. It has very good temperature resistance under acidic conditions, and has strong liquid-carrying, foaming and foam-stabilizing properties.

Method used

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  • Method of Drainage and Gas Recovery Using High Temperature and Anti-acid Foam Drainage Agent
  • Method of Drainage and Gas Recovery Using High Temperature and Anti-acid Foam Drainage Agent
  • Method of Drainage and Gas Recovery Using High Temperature and Anti-acid Foam Drainage Agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Preparation of foaming agent HFL01

[0067] a. Add 127.6 grams (0.55 moles) of pentaethylenehexamine and 1.4 grams (0.025 moles) of potassium hydroxide solid in the reaction flask equipped with mechanical stirring, thermometer, dropping funnel and atmospheric distillation device, and slowly drop them under stirring Add 148 grams (0.5 moles) of methyl oleate, react at a reaction temperature of 120 to 160°C for 6 hours, and collect the methanol generated by the reaction at the same time to obtain the desired amide compound C 17 h 33 CO(NHCH 2 CH 2 ) 5 NH 2 , yield 93.8%.

[0068] b. After removing the water in the three-necked flask device equipped with a reflux condenser, a dropping funnel, and a thermometer, add 11.4 grams (0.3 moles) of lithium aluminum hydride and 90 milliliters of dry dioxane, stir, disperse and mix, and then - Add 49.6 grams (0.1 moles) of C 17 h 33 CO(NHCH 2 CH 2 ) 5 NH 2 40wt% dioxane solution, after the dropwise addition, the temp...

Embodiment 2

[0073] With [Example 1], the difference is that when measuring the performance of HFL01, the pH is adjusted to 7, 4 and 2 with hydrochloric acid to simulate neutral and acidic gas environments, and the results are shown in Table 2.

Embodiment 3

[0075] With 【Example 1】, the difference is:

[0076] d. Polyamine compounds 1 (R 1 =C 18 h 35 , m=5, R 2 =R 3 =R 4 =CH 3 , t1=t2=s1=s2=0) 58.2 grams (0.1 mol) and 29.5 grams (0.15 mol) of 3-chloro-2-hydroxypropanesulfonate and 100 milliliters of ethanol / water (v / v=1) were mixed in In a four-necked flask equipped with mechanical stirring, a thermometer and a reflux condenser, it was heated to reflux for 5 hours. Evaporate the solvent and add water to obtain the polyamine compound 1 (R 1 =C 18 h 35 , m=5, R 2 =R 3 =R 4 =CH 3 , t1=t2=s1=s2=0) sodium hydroxypropanesulfonate product is the foaming agent HFL02, and the results are shown in Table 3.

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Abstract

The invention relates to a method for draining water and producing gas by adopting a high-temperature-resistant acid-resistant foam water drainage agent, and mainly solves a problem that an existing foam water drainage agent is poor in high-temperature resistance and high-salt resistance in an acid environment containing H2S and CO2 so as not to solve problems of production reduction and even spraying stop, which are caused by liquid accumulation of a high-temperature high-salt ultra-deep gas well. The invention well solves the problem by adopting the technical scheme that the method for draining water and producing gas by adopting the high-temperature-resistant acid-resistant foam water drainage agent comprises the following steps of: (1) mixing the foam water drainage agent with water toobtain foam water drainage agent solution; (2) enabling the foam water drainage agent solution or mixed solution of the foam water drainage agent solution and oil to be in sufficient contact with gasto form foam fluid, and displacing the water or an oil-water mixture in the foam water drainage agent solution, wherein the high-temperature-resistant acid-resistant foam water drainage agent comprises the following components in parts by mass: 1 part of alkylamine surfactant as shown in a formula (1) and 0 to 10 parts of nanoparticles. The method can be used for water drainage and gas productionof the acid high-temperature high-salt ultra-deep gas well. (with reference to the specification).

Description

technical field [0001] The invention relates to a method for water drainage and gas recovery using a high-temperature-resistant and acid-resistant foam drainage agent. Background technique [0002] With the intensification of gas field exploitation, water production from gas fields has become a key issue restricting the normal production of gas wells. Foam drainage gas recovery is a drainage gas recovery technology developed rapidly at home and abroad in recent years. It has the advantages of simple equipment, convenient construction, low cost, wide range of applicable well depths, and does not affect the normal production of gas wells. Foam drainage is to inject foam drainage agent into the well through the tubing or tubing annulus, and generate foam with certain stability under the agitation of the air flow. The liquid phase deposited by slippage in the pipe turns into foam, which changes the relative density of the fluid in the lower part of the pipe, and the continuousl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22C09K8/584
CPCC09K8/584C09K2208/10E21B43/16
Inventor 沈之芹何秀娟李应成马俊伟
Owner CHINA PETROLEUM & CHEM CORP