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Device for evaluating tolerance of gel natural gas in high-temperature and high-pressure environment and method thereof

A high-temperature, high-pressure, evaluation device technology, applied in the direction of measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve problems such as difficult to simulate the long-term dynamic coexistence environment of high temperature and high pressure gas in gas injection wells

Pending Publication Date: 2021-11-19
ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a device and method for evaluating the tolerance of jelly natural gas in a high temperature and high pressure environment, which can solve the problem of using traditional methods of gelling in ampoules to evaluate the performance of jelly in the prior art, which is difficult to simulate the high temperature and high pressure of gas injection wells And the deficiency of long-term dynamic coexistence environment with gas

Method used

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  • Device for evaluating tolerance of gel natural gas in high-temperature and high-pressure environment and method thereof
  • Device for evaluating tolerance of gel natural gas in high-temperature and high-pressure environment and method thereof
  • Device for evaluating tolerance of gel natural gas in high-temperature and high-pressure environment and method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Add 0.8g of polyacrylamide, 0.3g of urotropine, 0.3g of resorcinol, and 0.4g of stabilizer in sequence while stirring in 98.2g of simulated seawater, and keep stirring until uniform to obtain a gelling solution of the profile control system. Its composition is 0.8% polyacrylamide, 0.3% urotropine, 0.3% resorcinol, 0.4% high temperature stabilizer and 98.2% simulated seawater in terms of mass fraction. After gelling at a high temperature of 120°C for 24 hours, the evaluation was carried out according to steps S1-S8. The evaluation device was fed with natural gas, the experimental temperature was 120°C, and the pressure was 20MPa. The performance of the gel was measured every 15 days, and the retention rate of the gel strength was calculated. Elastic modulus after aging for different times / Elastic modulus after 24 hours of gelling.

Embodiment 2

[0099] Add 0.8g of polyacrylamide, 0.3g of urotropine, 0.3g of resorcinol, and 0.4g of stabilizer in sequence while stirring in 98.2g of simulated seawater, and keep stirring until uniform to obtain a gelling solution of the profile control system. Its composition is 0.8% polyacrylamide, 0.3% urotropine, 0.3% resorcinol, 0.4% high temperature stabilizer and 98.2% simulated seawater in terms of mass fraction. After gelling at 120°C for 24 hours, the evaluation is carried out according to steps S1-S8, but simulated water is introduced into the evaluation device, the experimental temperature is 120°C, and the pressure is 20MPa. The performance of the gel is measured every 15 days, and the strength retention of the gel is calculated. The ratio is elastic modulus after aging for different times / elastic modulus after 24 hours of gelation.

[0100] Embodiment 1,2 evaluation result is as image 3 shown.

[0101] This technical solution provides an evaluation device and method for th...

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Abstract

The invention aims to provide a device for evaluating tolerance of gel natural gas in a high-temperature and high-pressure environment and a method thereof, which can overcome the defect that in the prior art, the high-temperature and high-pressure environment of a gas injection well and the long-term dynamic coexistence environment of the gas injection well and the gas are difficult to simulate, and the device comprises a constant-temperature box and a high-temperature and high-pressure container, the constant-temperature box is used for simulating the environment temperature required by the experiment; the high-temperature and high-pressure container is arranged in the constant-temperature box, a cavity for containing samples is formed in the high-temperature and high-pressure container, and detachable sealing pieces are arranged at the two ends of the high-temperature and high-pressure container; an inlet valve and an outlet valve are arranged on the sealing pieces at the two ends of the high-temperature and high-pressure container respectively, and the inlet valve, the cavity and the outlet valve form a channel for media to pass through.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development engineering, in particular to a device and method for evaluating the tolerance of jelly natural gas in a high-temperature and high-pressure environment. Background technique [0002] Most of my country's oil fields have entered the stage of secondary oil recovery, and the formation energy is insufficient, so water injection or gas injection is needed to supplement the formation energy to drive out crude oil. The gas injection development process is relatively simple, the injected gas is easily dissolved in crude oil, and miscible flooding can be formed under formation conditions to improve oil displacement efficiency. As the associated gas of oilfields, natural gas is abundant underground, and it is often emptied or burned directly during mining projects, resulting in huge waste. The development of natural gas injection can recycle and utilize the produced crude oil associat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 袁辉王业飞郑华安朱毅仁贾辉丁名臣吴绍伟薛新房
Owner ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP
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