Foam water-drainage agent and its aqueous solution

A technology of foam drainage agent and aqueous solution, which is applied in the field of foam drainage agent, gas field foam drainage agent and its aqueous solution to achieve the effects of good biodegradability, prolonging life cycle and high resistance to salinity.

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent (publication number: CN 102634327 A) discloses a gas field foam drainage agent, which consists of 95 to 105 parts of Sapinberry extract, imidazoline, and dodecyl dimethyl betaine in a weight ratio (1 to 2 ): (1~2): (1~2) composed of surfactant, 3~7 parts of methyl cellulose and 5~10 parts of foam control agent, with the ability to resist 30% condensate oil and 90 °C high temperature ability, but its anti-mineralization ability is only 200g / L

Method used

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  • Foam water-drainage agent and its aqueous solution
  • Foam water-drainage agent and its aqueous solution
  • Foam water-drainage agent and its aqueous solution

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The foam drainage agent of this embodiment is composed of the following components in parts by weight: 50 parts of Sapindus chinensis extract, fatty alcohol polyoxyethylene ether AEO 18 20 parts, 1 part of polyacrylamide, 5 parts of triethanolamine.

[0028] The preparation method of the extract of Sapindus chinensis comprises the following steps: (1) Accurately weigh 100 parts by weight of the whole fruit of Sapinsia chinensis, crush it, add 300 parts by weight of water, and soak it at 80° C. for 36 hours; (2) in step (1) Add 2 parts by weight of polyaluminum sulfate to the soaked solution to flocculate for 12 hours, and after flocculation, take the supernatant and concentrate until the water content is 3% to obtain the Sapindus chinensis extract.

[0029] The aqueous solution of the foam drainage agent in this embodiment is respectively composed of 2.0%, 3.0%, 4.0%, 5.0%, and 6.0% of the volume percentage of the foam drainage agent and the remaining water.

Embodiment 2

[0031] The foam drainage agent of this embodiment is composed of the following components in parts by weight: 70 parts of Sapindus chinensis extract, fatty alcohol polyoxyethylene ether AEO 18 30 parts, 3 parts of polyacrylamide, 8 parts of triethanolamine.

[0032] The preparation method of the extract of Sapindus chinensis comprises the following steps: (1) Accurately weigh 100 parts by weight of the whole fruit of Sapinsia sativa, crush it, add 300 parts by weight of water, and soak it at 90° C. for 48 hours; (2) in step (1) Add 2 parts by weight of polyaluminum sulfate to the soaked solution to flocculate for 18 hours, and after flocculation, take the supernatant and concentrate until the water content is 2.5% to obtain the Sapindus chinensis extract.

[0033] The aqueous solution of the foam drainage agent in this embodiment is respectively composed of 2.0%, 3.0%, 4.0%, 5.0%, and 6.0% of the volume percentage of the foam drainage agent and the remaining water.

Embodiment 3

[0035] The foam drainage agent of this embodiment is composed of the following components in parts by weight: 80 parts of Sapindus chinensis extract, fatty alcohol polyoxyethylene ether AEO 18 40 parts, 5 parts of polyacrylamide, 10 parts of triethanolamine.

[0036] The preparation method of the extract of Sapindus chinensis comprises the following steps: (1) Accurately weigh 100 parts by weight of the whole fruit of Sapinsia sativa, crush it, add 300 parts by weight of water, and soak it at 100°C for 72 hours; (2) in step (1) Add 2 parts by weight of polyaluminum sulfate to the soaked solution to flocculate for 24 hours, and after flocculation, take the supernatant and concentrate to a water content of 4% to obtain the Sapindus chinensis extract.

[0037] The aqueous solution of the foam drainage agent in this embodiment is composed of 2.0%, 3.0%, 4.0%, 5.0%, and 6.0% of the volume percentage of the foam drainage agent and the remaining water.

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Abstract

The invention discloses a foam water-drainage agent and its aqueous solution, and belongs to the technical field of the oilfield chemical engineering. The foam water-drainage agent is composed of 50-80 parts by weight of a Sapindus mukurossi Gaertn extract, 20-40 parts of fatty alcohol polyoxyethylene ether AEO18, 1-5 parts by weight of polyacrylamide and 5-10 parts by weight of triethanolamine. The foam water-drainage agent has the characteristics of strong foaming capability after meeting water, good foam stability, and high liquid carrying capability and high mineralization resistance of foams, and is suitable for the use in natural gas wells containing gas condensate and having a high mineralization and a large water output; the foam water-drainage agent has a foam stability of 170mm, has a foam water content of not more than 2.0%, has a mineralization resistance of 250g/L, has a gas condensate resistance of 30%, has a temperature resistance of 90DEG C, is non-toxic, is easy to degrade, and does not pollute the environment; and the foam water-drainage agent has the advantages of compatibility with chemicals comprising methanol, a corrosion inhibitor, a scale inhibitor and the like, no chemical reaction with gas or liquid components, no increase to the toxicities of gases or combustion products, and no corrosion to equipment or pipelines.

Description

technical field [0001] The invention relates to a foam drainage agent, in particular to a gas field foam drainage agent and its aqueous solution, and belongs to the technical field of oilfield chemical industry. Background technique [0002] In the middle and later stages of natural gas well exploitation, due to the decline of the bottom energy of the gas well itself, the formation water also enters the wellbore along with the natural gas, and accumulates at the bottom of the well or near the well, causing the gas production of the gas well to decrease or to be drowned by water. At present, the commonly used drainage gas recovery methods include pipe string drainage, gas lift drainage, foam drainage, ultrasonic atomization drainage, rod pump drainage, etc. The foam drainage gas recovery method is simple in equipment, convenient in construction, low in cost, and applicable to a wide range of well depths. The characteristics of not affecting the normal production of gas wells ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
Inventor 郑锋戚杰刘伟张文才刘争芬吴伟然李海林周子淳张亚军蒋文才
Owner CHINA PETROLEUM & CHEM CORP
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