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Foaming material for gas field foam discharging agent, slow dissolving foam discharging agent, and preparation method of slow dissolving foam discharging agent

A technology of foaming material and foaming agent, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of poor foaming effect, disconnection of gas well oil casing, easy rupture, etc., and achieves increased toxicity and foaming. The effect of strong liquid-carrying ability and slow dissolution rate

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for some horizontal wells, the string structure is complex, there are multiple packers in the well, and they cannot be unsealed, resulting in disconnection of the oil casing of the gas well. In order to ensure that the agent can fully flow down, the well needs to be shut down. When the well is shut down, the fluid in the upper part of the tubing will fall back to the bottom of the well. Therefore, in order to make the agent mix with the bottomhole fluid, the well must be shut in for a long enough time. The field test should be at least 6 hours. This not only affects the production rate of the gas well, but also makes it difficult to start the bubble drainage due to the large amount of fluid flowing back to the horizontal section, and the foam drainage effect is poor
Secondly, the horizontal well is a highly deviated well, and the build-up section is long, and the foam is easily broken in the build-up section, which affects the foam discharge effect. At the same time, when the rods are cast, the foam discharge rods can only reach the build-up section and cannot enter the horizontal section. Affect the throwing effect, resulting in poor bubble discharge effect

Method used

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  • Foaming material for gas field foam discharging agent, slow dissolving foam discharging agent, and preparation method of slow dissolving foam discharging agent
  • Foaming material for gas field foam discharging agent, slow dissolving foam discharging agent, and preparation method of slow dissolving foam discharging agent
  • Foaming material for gas field foam discharging agent, slow dissolving foam discharging agent, and preparation method of slow dissolving foam discharging agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The foaming material used in the foaming agent in this embodiment is composed of Sapindus chinensis extract, fatty alcohol polyoxyethylene ether AEO 18 It is compounded with lauric acid diethanolamide, and its mass ratio is 50:4:3.5.

[0025] The slow-dissolving foam discharge agent in this example is composed of the following components in percentage by weight: 50% Sapindus japonica extract, fatty alcohol polyoxyethylene ether AEO 18 4%, lauric acid diethanolamide 3.5%, polyvinyl alcohol (PVA) 13%, enteric acrylic resin 29.5%.

[0026] The preparation method of slow-dissolving foam discharge agent in the present embodiment is, comprises the following steps:

[0027] (1) Preparation of the extract of Sapindus chinensis: in parts by weight, take 100 parts of the whole fruit of Sapindus chinensis, crush it, add it to 300 parts of water, and soak it at 80°C for 72 hours; add it to the solution after soaking 2 parts of polyaluminum sulfate, take the supernatant after 18 h...

Embodiment 2

[0031] The foaming material for the foaming agent in this example is composed of Sapindus chinensis extract, fatty alcohol polyoxyethylene ether AEO18 and lauric acid diethanolamide, and its mass ratio is 55:4.4:3.1.

[0032] The slow-dissolving foam discharge agent in this embodiment is composed of the following components in percentage by weight: 55% Sapindus chinensis extract, fatty alcohol polyoxyethylene ether AEO 18 4.4%, lauric acid diethanolamide 3.1%, polyvinyl alcohol (PVA) 12.5%, enteric-coated acrylic resin 25%.

[0033] The preparation method of the slow-dissolving foam discharge agent in this embodiment is the same as that in Embodiment 1.

Embodiment 3

[0035] The foaming material used in the foaming agent in this embodiment is composed of Sapindus chinensis extract, fatty alcohol polyoxyethylene ether AEO 18 It is compounded with lauric acid diethanolamide, and its mass ratio is 60:5:2.5.

[0036] The slow-dissolving foam discharge agent in this embodiment is composed of the following components in percentage by weight: 60% of Sapindus chinensis extract, fatty alcohol polyoxyethylene ether AEO18 5%, lauric acid diethanolamide 2.5%, polyvinyl alcohol (PVA) 12%, enteric acrylic resin 20.5%.

[0037] The preparation method of the slow-dissolving foam discharge agent in this embodiment is the same as that in Embodiment 1.

[0038] The fatty alcohol polyoxyethylene ether AEO adopted in the above-mentioned embodiment 1-3 18 Purchased from Jiangsu Haian Chemical Industry, lauric acid diethanolamide was purchased from Nantong Chenrun Chemical Co., Ltd., polyvinyl alcohol was purchased from Zhengzhou Shengfeng Chemical Raw Material ...

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Abstract

The invention discloses a foaming material for a gas field foam discharging agent, a slow dissolving foam discharging agent, and a preparation method of the slow dissolving foam discharging agent, and belongs to the technical field of the oilfield chemistry. The foaming material comprises, by weight, 1 part of Sapindus mukurossi Gaertn extract, 0.03-0.1 parts of fatty alcohol polyoxyethylene ether AEO18 and 0.01-0.1 parts of lauric diethanolamide. The foaming material can be obtained by compounding the above three components, can mutually enhance surface active substances in the foaming material, improves the stability and environmental disturbance resistance of foams, improves the biodegradability of a surfactant, and reduces the toxicity of the foam discharging agent and the pollution of the foam discharging agent to the environment. PVA and an enteric acrylic resin are added as dressing materials, so the dissolving rate of the foaming material in water can be effectively controlled, thereby the foam discharging agent obtained by using the foaming agent is slowly dissolved in water, has a strong salinity resistance and a strong condensate oil resistance, has a very strong secondary foaming ability, has good compatibility with drugs comprising methanol, a corrosion inhibitor, a scale inhibitor and the like, and does not chemically react with gas or liquid components.

Description

technical field [0001] The invention specifically relates to a foaming material for a gas field foaming agent, a slow-dissolving foaming agent using the foaming material and a preparation method thereof, and belongs to the technical field of oilfield chemistry. Background technique [0002] The formation water produced during the exploitation of gas fields will affect the production of natural gas to varying degrees. In order to help gas wells discharge formation produced water, people have used drainage technologies such as foam drainage, plunger gas lift drainage, ultrasonic atomization drainage, gas lift drainage, split plunger drainage, rod pump drainage, rodless pump drainage, etc. . Foam drainage gas recovery technology has the advantages of simple equipment, easy construction, quick results, low cost, less gas well energy loss, and no impact on gas well production, and has been widely used in gas production at home and abroad. [0003] At present, many domestic manu...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 郑锋戚杰蒋文才刘伟王贵生刘争芬徐卫峰王雷周子淳杨波
Owner CHINA PETROLEUM & CHEM CORP
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