Gas field foam drainage agent

A foam drainage agent and gas field technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of general foam stability, inability to be effectively discharged, poor foam discharge effect, etc., and achieve the goal of increasing toxicity Effect

Active Publication Date: 2012-08-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the average stability of the foam produced, there is not enough energy to lift the foam out of the wellhead quickly and in time for geopressured gas wells (wellhead oil pressure is lower than 6MPa), and many foams slip and burst in the w

Method used

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  • Gas field foam drainage agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The gas field foam drainage agent of the present embodiment is made up of the following components by weight: 95 parts of surfactants, 3 parts of methylcellulose, 5 parts of DC-7 foam control agents (Dow Corning), wherein surfactants are made of Sapindus chinensis extract, imidazoline and dodecyl dimethyl betaine are composed according to the weight ratio of 1:2:2. Wherein the extraction method of Sapindus chinensis extract is as follows:

[0015] Take Socceria chinensis and crush it into small pieces of 1 cm, add water and soak at 80°C for 36 hours, then add flocculant aluminum sulfate to flocculate for 12 hours, take the supernatant liquid and concentrate it under reduced pressure to 5wt% water content to obtain the Sagittarius Extract.

Embodiment 2

[0017] The gas field foam drainage agent of the present embodiment is made up of the following components by weight: 100 parts of surfactants, 5 parts of methyl cellulose, 7 parts of DC-7 foam control agents (Dow Corning), wherein the surfactants are made of The sapinsia extract, imidazoline and dodecyl dimethyl betaine are composed according to the weight ratio of 2:1:2. Wherein the extraction method of Sapindus chinensis extract is as follows:

[0018] Take Socceria chinensis and crush it into small pieces of 3 cm, add water and soak for 72 hours at 100°C, then add flocculant aluminum sulfate to flocculate for 18 hours, take the supernatant liquid and concentrate it under reduced pressure to 3wt% water content to obtain Sagittarius Extract.

Embodiment 3

[0020] The gas field foam drainage agent of the present embodiment is made up of the following components by weight: 105 parts of surfactants, 7 parts of methyl cellulose, 10 parts of DC-7 foam control agents (Dow Corning), wherein surfactants are made of Sapindus chinensis extract, imidazoline and dodecyl dimethyl betaine are composed according to the weight ratio of 2:2:1. Wherein the extraction method of Sapindus chinensis extract is as follows:

[0021] Take Socceria chinensis and crush it into small pieces of 2 cm, add water and soak at 90°C for 48 hours, then add flocculant aluminum sulfate to flocculate for 24 hours, take the supernatant liquid and concentrate it under reduced pressure to contain 1 wt% of water, to obtain Sagittarius Extract.

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Abstract

The invention discloses a gas field foam drainage agent which comprises the components in parts by weight: 95-105 parts of surface active agent, 3-7 parts of methyl cellulose and 5-10 parts of bubble control agent, wherein the surface active agent comprises soapberry extract, imidazoline, dodecyl dimethyl betaine according to the weight ratio of 1-2: 1-2: 1-2. The foam generated by the gas field foam drainage agent in water has good stability, and the stability of the foam reaches 141mm; the water content of the foam is less than or equal to 2.18%; and the mineralization resistance is 200000mg/L, the condensate oil resistance is 30%, the temperature resistance is more than 90 DEG C, and the optimal effective concentration is 3-5%. Furthermore, the gas field foam drainage agent is non-toxic, easily degraded and free from pollution to the environment.

Description

technical field [0001] The invention relates to a gas field foam drainage agent, in particular to a low-pressure foam drainage agent in the field of oil and gas field development. It belongs to the field of oilfield chemical technology, Background technique [0002] The formation water produced during the exploitation of gas fields will affect the production of natural gas to varying degrees. There are two main sources of formation water: one is the intrusion of free water in the formation, such as edge water, bottom water, and interlayer water; Condensate water appears. [0003] If the gas well itself has enough energy, the formation water will be taken out of the wellhead by the rising airflow; if the energy of the gas well itself is insufficient, the formation water will gradually accumulate in the wellbore and near the bottom of the well due to the slippage effect during the gas flow lifting process , the accumulated liquid phase will cause damage to the formation nea...

Claims

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Application Information

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IPC IPC(8): C09K8/584
Inventor 杨益荣戚杰刘伟张文洪郑锋吴伟然
Owner CHINA PETROLEUM & CHEM CORP
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