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Oil-proof sustained-release solid foaming drainage agent used for gas wells, and preparation method and applications thereof

A foam drainage agent and technology of drainage agent, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of high local concentration of foam drainage agent, waste of chemicals, etc. The effect of long and simple operation of the preparation process

Active Publication Date: 2017-05-31
四川锦盛油田技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing solid foam drainage wells have a fast dissolution rate, which easily causes the local concentration of foam drainage agent to be too high, resulting in waste of agents, and cannot be better applied to gas field produced water with high condensate oil and high mineral density. In order to solve the problems under high temperature and high temperature downhole conditions, an oil-resistant slow-release solid foam drainage agent for gas wells, its preparation method and application are provided
At the same time, the preparation process of the present invention is simple to operate, does not cause pollution to the environment, does not chemically react with gas and liquid components, does not corrode equipment and pipelines, can solve the outstanding problems of current gas well production, and is suitable for various types of water production gas well

Method used

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  • Oil-proof sustained-release solid foaming drainage agent used for gas wells, and preparation method and applications thereof
  • Oil-proof sustained-release solid foaming drainage agent used for gas wells, and preparation method and applications thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0027] The medicament formula and synthesis process involved in the invention can produce a high-condensate oil-resistant, high-salinity-resistant, high-temperature-resistant slow-release solid foam drainage agent for gas wells. Now set forth the preparation method of the foam drainage agent, the specific steps are as follows.

[0028] 1. Prepare

[0029] 1) Preparation of raw materials.

[0030] 2) Check whether there are foreign objects in the reactor, and if there are foreign objects, remove them in time.

[0031] 3) Start the mixer and observe whether it is working normally, if not, carry out corresponding maintenance.

[0032] 4) Calibrate scales:

[0033] a) Zero adjustment.

[0034] b) Calibrate the instrument with a 500g standard weight.

[0035] 2. Production:

[0036] 1) Depending on the size of the reaction kettle, fully mix fatty amidopropyl hydroxysultaine, lauryl amidopropyl betaine, and cocodiethanolamine according to the ratio (mass percentage: 40% to 20%...

Embodiment 1

[0046] (1) Configuration of foaming ingredients

[0047] Weigh each component according to the following mass ratio: 20kg fatty amidopropyl hydroxysultaine, 40kg lauryl amidopropyl betaine, 40kg cocodiethanolamine, stir for 30 minutes, and mix the components evenly to obtain the foaming component .

[0048] (2) Configure drainage agent

[0049] Weigh each component according to the following mass ratio: 30kg of foaming component, 20kg of polyethylene glycol, 35kg of acrylic resin, and 15kg of sodium sulfate, and mix the weighed components evenly to obtain the product.

[0050] It has been determined that the product prepared in this example has a dissolution time of more than 72 hours in 90°C water; the anti-condensate oil ability is 65%; the temperature resistance ability is ≥ 120°C, and the high salinity resistance reaches 250,000ppm; the foam drainage agent foams Capacity is 162mm.

Embodiment 2

[0052] (1) Configuration of foaming ingredients

[0053] Weigh each component according to the following mass ratio: 35kg fatty amidopropyl hydroxysultaine, 35kg lauryl amidopropyl betaine, 30kg cocodiethanolamine, stir for 45 minutes, and mix the components evenly to obtain the foaming component .

[0054] (2) Configure drainage agent

[0055] Weigh each component according to the following mass ratio: 40kg of foaming component, 15kg of polyethylene glycol, 30kg of acrylic resin, and 15kg of sodium sulfate, and mix the weighed components evenly to obtain the product.

[0056] It has been determined that the product prepared in this example has a dissolution time of more than 72 hours in 90°C water; the anti-condensate oil ability is 58%; the temperature resistance ability is ≥ 120°C, and the high salinity resistance reaches 250,000ppm; the foam drainage agent foams Capacity is 155mm.

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Abstract

The invention discloses an oil-proof sustained-release solid foaming drainage agent used for gas wells, and a preparation method and applications thereof. The oil-proof sustained-release solid foaming drainage agent is mainly used for solving problems of conventional solid foaming drainage agents that high local concentration and waste are caused because of high dissolving speed, and preferable application is different to realize when gas well output water is high in gas condensate content, high in mineralization degree, and high in temperature. The dissolving time of the oil-proof sustained-release solid foaming drainage agent at 90 DEG C formation water condition is longer than 72h, and agent effect lasting time is long; the oil-proof sustained-release solid foaming drainage agent is capable of resisting gas condensate of 50% or higher, temperature of 120 DEG C or higher, and mineralization degree of 250000ppm; the foaming power is equal to or larger than 140mm; foam stabilizing time is long; and compatibility with agents such as methyl alcohol, corrosion inhibitors, and scale inhibitors is high. The preparation method is simple; no environment pollution is caused; no chemical reaction of products with gas and liquid ingredients is caused; equipment or pipeline corrosion is not caused; the prominent problems of gas wells are solved; and the oil-proof sustained-release solid foaming drainage agent is suitable for a plurality of water-producing gas wells.

Description

technical field [0001] The invention relates to the field of oil fields, in particular to an oil-resistant slow-release solid foam drainage agent for gas wells, a preparation method and application thereof. Background technique [0002] In the middle and late stages of natural gas well production, effective drainage of gas wells is an important means to maintain stable and increase production of gas wells. Among the many water-bearing gas well drainage measures, foam drainage has the advantages of simple equipment, convenient construction, and low cost, making foam drainage far exceed the drainage measures such as ultrasonic atomization drainage, velocity string drainage, and gas lift drainage in gas fields. application frequency. At present, foam drainage has become a routine maintenance measure for gas field drainage and gas production. [0003] Commonly used foam drainage agents have two forms: solid and liquid. Due to the natural environment limitation of the measure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58C09K8/584
Inventor 杨泽超杨智凡小瑜杨剑锋
Owner 四川锦盛油田技术服务有限公司
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