A self-disturbing capsule solid foaming agent

Abstract

The invention relates to a self-perturbing capsule-type solid foam scrubbing agent for oil and gas field gas production. The self-perturbing capsule-type solid foam scrubbing agent realizes full mixing with water in the well bottom so that drainage and gas recovery efficiency of the horizontal well is improved. The solid foam scrubbing agent is processed to form a capsule-type capsule shell, the capsule has the outer surface comprising two halves of capsule shell parts with sealing interlayers, two sides of the capsule shell are provided with two small symmetrical holes, the capsule shell is prepared from the solid foam scrubbing agent, the sealing interlayers of the capsule shell are filled with a liquid foam scrubbing agent, the center in the capsule shell is divided into two parts through a water-soluble diaphragm, the upper part is filled with ammonium chloride solids, the lower part is filled with sodium bicarbonate solids, and the two halves of the capsule are connected by the water-soluble diaphragm. The solid foam scrubbing agent is used in the drainage and gas recovery processes, is simple, convenient and economic, solves the problem that the foam scrubbing agent in a gas well has poor foaming ability under the condition of no bubble, effectively improves a reaction rate and a foam liquid-carrying capacity, has high drainage and gas recovery efficiency and saves a cost.

Description

technical field [0001] The invention relates to a self-disturbance capsule-like solid foaming agent used in oil and gas field gas recovery operations, especially used in horizontal well drainage and gas recovery. Background technique [0002] As the development of the gas field enters the middle and late stages, the flow rate of natural gas in the gas layer will gradually decrease, more and more water will be produced, and the gas-water ratio will become smaller and smaller. At that time, the water in the gas layer will accumulate at the bottom of the well, which will suppress the pressure at the bottom of the well and seriously affect the production of the gas well. Foam drainage gas recovery is the most widely used and effective method to effectively discharge the bottom well fluid. [0003] The current foaming agent dosing device can only complete the injection of the foaming agent at the wellhead. Once the foaming agent contacts with water, it will start to react. It is...

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Problems solved by technology

[0003] The current foaming agent dosing device can only complete the injection of the foaming agent at the wellhead. Once the foaming agent contacts with water, it will start to react. It is difficult to make it fully mix and react with the fluid at the bottom of the well. The foaming agent has a small range , and, in the absence of air flow agitation, the foaming ability of the foam row rod is low, and its foaming effect cannot be fully and efficiently used for drainage and gas recovery

The invention published by the Chinese Patent Application No. 201410479075.2 "A Self-Foaming Foam Drainage Agent and Its Preparation Method" only mentions the self-foaming formula of the foam discharge agent, but cannot achieve the result of self-disturbance

[0004] After literature research, the article No. 1673-064X(2015)03-0059-08 "Evaluation of Foam Removal Agents Currently Used in Changqing Gas Field and Research on Self-Generation Foam Removal Agents" mentioned the formulation and experimental verification of self-generated foam repellants, but There is no related report on a self-disturbing self-gas capsule-like bubble discharge stick

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