Solid oil-resistant foam drainage agent composition and preparation method and application thereof

Abstract

The invention relates to a solid foam drainage agent composition and a preparation method and application thereof. The solid foam drainage agent composition and the preparation method and applicationthereof mainly solve the problems of liquid accumulation at shaft bottom, production reduction or even spraying stopping of a gas well and difficult filling of a liquid foam drainage agent due to thefact that foam formed by an existing foam drainage agent in the development process of condensate wells is insufficient in oil resistance and the drainage performance of the foam is poor. According tothe technical scheme, the solid foam drainage agent composition is prepared from the following components in parts by mass: 1 part of alkylamine polyether benzenesulfonate with a general molecular formula represented by the formula (I), 0.1-50 parts long-chain polyether nitrogen-containing compounds with a general molecular formula represented by formula (II), 0.2-100 parts of solid fillers and 0-0.5 part of a binding agent; and R' is any one of the alkyl groups of C<8>-C<20>; R<1> is fatty groups of C<10>-C<26>; and R<2> is alkylene groups of C<1>-C<4>; and the problems of liquid accumulation at the shaft bottom, production reduction or even spraying stopping of the gas well and difficult filling of the foam drainage agent are well solved, and the solid foam drainage agent composition can be used in gas well drainage gas production industry. (Please see the specification for the formula).

Description

technical field [0001] The invention relates to a solid oil-resistant foam drainage composition and its preparation method and application, in particular to a solid foam drainage composition for wells containing condensate oil and gas, a preparation method and its application. Background technique [0002] With the intensification of gas field exploitation, water production from gas fields has become a key issue restricting the normal production of gas wells. Foam drainage gas recovery is a drainage gas recovery technology developed rapidly at home and abroad in recent years. It has the advantages of simple equipment, convenient construction, low cost, wide range of applicable well depths, and does not affect the normal production of gas wells. Foam drainage is to inject foam drainage agent into the well through the tubing or tubing annulus, and generate foam with certain stability under the agitation of the air flow. The liquid phase deposited by slippage in the pipe turns...

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Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that in the process of gas well development, the foam formed by the existing foam drainage agent has insufficient oil resistance and temperature resistance, and the foam drainage performance is poor, resulting in fluid accumulation at the bottom of the well, reduced production of the gas well, or even stop spraying and liquid injection Difficult problem, to provide a solid oil-resistant foam drainage agent composition, which can be used for drainage and gas recovery of condensate oil and gas wells, can carry liquid efficiently, and has good oil resistance, thermal stability, foaming performance and liquid carrying capacity

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