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Filtrate reducer suitable for high-temperature stratum and preparation method

A filtrate reducer and formation technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as unreachable standards for use, and achieve high contact probability, high temperature resistance, and stable grafting rate Effect

Pending Publication Date: 2020-06-30
SHANGHAI EVEREST FINE CHEMICALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a fluid loss control agent suitable for high-temperature formations and a preparation method, which solves the problem that most of the existing fluid loss control agents cannot meet the standards for use in high-temperature environments after they are produced. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: A fluid loss reducer suitable for high-temperature formations, including the following raw materials in parts by weight: 1 part of EPDM rubber, 2 parts of polyolefin elastomer, 1 part of anhydrous calcium chloride, 1 part of dicumyl oxide, 2 parts of dibenzoyl peroxide, 2 parts of acrylic acid and 3 parts of acetone.

[0025] A method for preparing a fluid loss control agent suitable for high-temperature formations, comprising the following steps:

[0026] (α) Add 1 part of EPDM rubber and 2 parts of polyolefin elastomer into a torque rheometer at 100°C to melt, and add 1 part of crosslinking agent dicumyl peroxide;

[0027] (b) Mix 1 part of EPDM rubber and 2 parts of polyolefin elastomer evenly, then raise the temperature to 160°C to make 1 part of dicumyl peroxide act, and discharge after 800 seconds to obtain EPDM rubber Mix powder with polyolefin elastomer, after the reaction of EPDM rubber and polyolefin elastomer, put the mixed powder of EPDM rubbe...

Embodiment 2

[0031] Embodiment 2: A fluid loss reducer suitable for high-temperature formations, including the following raw materials in parts by weight: 3 parts of EPDM rubber, 4 parts of polyolefin elastomer, 2 parts of anhydrous calcium chloride, 3 parts of dicumyl oxide, 3 parts of dibenzoyl peroxide, 4 parts of acrylic acid and 5 parts of acetone.

[0032] A method for preparing a fluid loss control agent suitable for high-temperature formations, comprising the following steps:

[0033] (α) Add 3 parts of EPDM rubber and 4 parts of polyolefin elastomer into a torque rheometer at 110°C for melting, and add 3 parts of crosslinking agent dicumyl peroxide;

[0034] (b) Mix 3 parts of EPDM rubber and 4 parts of polyolefin elastomer evenly, then heat up to 160°C to make 3 parts of dicumyl peroxide act, and discharge after 850 seconds to obtain EPDM rubber Mix powder with polyolefin elastomer, after the reaction of EPDM rubber and polyolefin elastomer, put the mixed powder of EPDM rubber a...

Embodiment 3

[0038] Embodiment 3: A fluid loss reducer suitable for high-temperature formations, including the following raw materials in parts by weight: 5 parts of EPDM rubber, 8 parts of polyolefin elastomer, 3 parts of anhydrous calcium chloride, 5 parts of dicumyl oxide, 4 parts of dibenzoyl peroxide, 5 parts of acrylic acid and 6 parts of acetone.

[0039] A method for preparing a fluid loss control agent suitable for high-temperature formations, comprising the following steps:

[0040] (α) Add 5 parts of EPDM rubber and 8 parts of polyolefin elastomer into a torque rheometer at 100°C for melting, and add 6 parts of crosslinking agent dicumyl peroxide;

[0041] (b) Mix 5 parts of EPDM rubber and 8 parts of polyolefin elastomer evenly, then raise the temperature to 160°C to make 6 parts of dicumyl peroxide act, react for 900 seconds and discharge to obtain EPDM rubber Mix powder with polyolefin elastomer, after the reaction of EPDM rubber and polyolefin elastomer, put the mixed powde...

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PUM

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Abstract

The invention relates to the technical field of filtrate reducer preparation, and discloses a filtrate reducer suitable for the high-temperature stratum and a preparation method of the filtrate reducer. The preparation method comprises the following steps: taking 4 parts of acrylic acid, 10 parts of rubber powder and 3 parts of dibenzoyl peroxide in a water-phase powder chemical grafting method, and adding different parts of water under the condition of nitrogen protection at 90 DEG C; wherein it can be judged that the grafting rate tends to be stable when the water amount ranges from 10 partsto 12 parts, the monomer is more uniformly dispersed in the water due to the increase of the water quantity, the contact probability of the monomer and the mixed powder of ethylene propylene diene monomer and polyolefin elastomer is higher, the success rate during manufacturing is effectively improved; through different tests, the addition amount of water, the use amount of an initiator and the use amount of a monomer have great influence on the grafting rate, and the filtrate reducer prepared from the ethylene propylene diene monomer and polyolefin elastomer mixed powder and acrylic acid farexceeds a standard line in high-temperature and high-pressure rate loss, so that the high-temperature-resistant effect can be greatly improved by preparing the filtrate reducer through the method.

Description

technical field [0001] The invention relates to the technical field of fluid loss control agent production, in particular to a fluid loss control agent suitable for high-temperature formations and a preparation method thereof. Background technique [0002] Filtrate reducer is one of the most important treatment agents in drilling fluid. It plays an important role in stabilizing the borehole wall and protecting oil and gas layers. The purpose of adding fluid loss reducer in drilling fluid is to form low permeability on the borehole wall. , thin and dense filter cake, reduce the fluid loss of drilling fluid as much as possible, with the continuous development of technology, most of the current fluid loss control agents are not suitable for most drilling operations, and most of the After the fluid loss control agent is produced, most of them cannot meet the standards for use in high temperature environments. Contents of the invention [0003] (1) Solved technical problems ...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08F279/02C08F255/02C08F220/06
CPCC08F255/02C08F279/02C09K8/035C08F220/06
Inventor 丁海瑞
Owner SHANGHAI EVEREST FINE CHEMICALS CO LTD