Thickening agent, preparation method and application thereof
A thickening agent and reactor technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of low operating efficiency, poor production increase effect of oil and gas fields, etc., achieve short time consumption, easy popularization and application, and improve durability The effect of high temperature performance
Active Publication Date: 2022-08-05
PETROCHINA CO LTD
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[0004] The embodiment of the present invention provides a thickener, a preparation method and its application, which can solve the problems of poor production increase effect and low operating efficiency in oil and gas fields
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preparation example Construction
[0056] On the other hand, the embodiment of the present invention provides a kind of preparation method of thickening agent, and this preparation method comprises:
[0057] Step 1: According to the mass ratio of each component, three monosodium 2-acrylamido-2-methylpropanesulfonate, methacryloyloxyethyltrimethylammonium chloride and 4-ethylbenzenesulfonate The body is added to the reactor, and the first volume of deionized water is added to the reactor to prepare an aqueous solution with a mass concentration of 30% to 45%.
[0058] The mass ratio of 2-acrylamide-2-methylpropanesulfonate sodium, methacryloyloxyethyltrimethylammonium chloride and 4-ethylbenzenesulfonate sodium is 22924~11462:311.55~20.77 : 10.41 to 2.08, and the molar ratio is 100 to 50: 1.5 to 0.1: 0.05 to 0.01.
[0059] Step 2: Pour nitrogen gas with a purity of 99.999% into the reactor, and after the first time interval, in the second time interval, add cosolvents, chain transfer agents, azos to the aqueous ...
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Abstract
The invention discloses a thickening agent, a preparation method and application thereof, and belongs to the technical field of oilfield acidification. The chemical structural formula of the thickening agent provided in the embodiment of the present invention is as follows: wherein, the value of x:y:z is 35000-60000:80-600:10-55, and x, y and z are all integers; the thickening agent The viscosity average molecular weight is 9 million to 13 million. The thickener can effectively reduce the frictional resistance between the thickening acid and the acid pump. In addition, the chemical structural formula of the thickener contains a functional group and a sulfonic acid group of methacryloyloxyethyltrimethylammonium chloride which can improve the high temperature resistance of the thickener. Therefore, the thickening agent can reduce the frictional resistance between the thickening acid and the acid pump, and improve the high temperature resistance of the thickening acid. The preparation method of the thickening agent is simple in process, short in time, and convenient for popularization and application.
Description
technical field [0001] The invention relates to the technical field of oilfield acidification. In particular, it relates to a thickening agent, preparation method and application thereof. Background technique [0002] In the process of oil and gas field exploitation, acidification is an important measure for reservoir reconstruction in oil and gas fields. Acidizing stimulation mainly refers to injecting densified acid into the formation through the wellbore, so that the injected densified acid reacts with the rock cement or other soluble matter in the oil and gas layer, increasing pores and fractures, thereby improving the permeability of the oil and gas layer. , to achieve the purpose of increasing the production of oil and gas fields. However, under high temperature conditions, the movement rate and reaction rate of hydrogen ions in the densified acid are fast, and the densified acid is consumed by the rock cements or other soluble substances in the near-wellbore zone be...
Claims
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IPC IPC(8): C08F220/58C08F220/34C08F212/14C09K8/74
CPCC08F220/58C09K8/725C09K8/74C09K2208/28
Inventor 王道成孙川张燕吴文刚周承美廖珈
Owner PETROCHINA CO LTD