High-temperature-resistant composite filtrate reducer for seawater drilling fluid and preparation method of high-temperature-resistant composite filtrate reducer

A technology of fluid loss reducer and drilling fluid, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of difficulty in obtaining fluid loss reduction effect, poor high temperature resistance performance, etc., and achieve excellent fluid loss reduction performance. and thermal stability, excellent filtration performance, and easy biodegradation

Active Publication Date: 2021-06-29
山东红锦石油技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluid loss control agent can only meet the fluid loss control requirements at a temperature of 150°C, and its main components are modified starch and polyacrylonitrile hydrolyzate, both of which hav

Method used

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  • High-temperature-resistant composite filtrate reducer for seawater drilling fluid and preparation method of high-temperature-resistant composite filtrate reducer
  • High-temperature-resistant composite filtrate reducer for seawater drilling fluid and preparation method of high-temperature-resistant composite filtrate reducer
  • High-temperature-resistant composite filtrate reducer for seawater drilling fluid and preparation method of high-temperature-resistant composite filtrate reducer

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A high temperature resistant composite fluid loss reducer for seawater drilling fluid, characterized in that, based on the total mass of the composite fluid loss reducer, the composite fluid loss reducer comprises polymer A-A-C 85wt% and sodium nitrohumate 15wt%.

[0035] Wherein, based on the total mass of the polymer A-A-C, the polymer A-A-C is made of the following raw materials in weight percentage: 20wt% of 2-acrylamide-2-methylpropanesulfonic acid, 30wt% of acrylamide, modified plant source Agent 48wt%, initiator 2wt%.

[0036] The plant-derived modifying agent is nano-microcrystalline cellulose extracted from bagasse, and its preparation method includes the following steps,

[0037] S1: Prepare H with a mass concentration of 65% 2 SO 4 solution;

[0038] S2: Using a high-speed pulverizer to repeatedly pulverize the plant material so that the particle size of the material is 1-3 mm; add 10 times the mass of distilled water to the pulverized material, and stir ...

Embodiment 2

[0047] The preparation method is the same as in Example 1, except that the amount of each component in Example 2 is: based on the total mass of the polymer A-A-C, the polymer A-A-C is made of the following raw materials in weight percentage: 2-acrylamide- 18wt% of 2-methylpropanesulfonic acid, 25wt% of acrylamide, 55wt% of plant-derived modifier, and 2wt% of initiator.

Embodiment 3

[0049] The preparation method is the same as in Example 1, except that the amount of each component in Example 3 is: based on the total mass of the polymer A-A-C, the polymer A-A-C is made of the following raw materials in weight percentage: 2-acrylamide- 25wt% of 2-methylpropanesulfonic acid, 30wt% of acrylamide, 43wt% of plant-derived modifier, and 2wt% of initiator.

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Abstract

The invention relates to the technical field of filtrate reducer for drilling fluids, and in particular, relates to a high-temperature-resistant composite filtrate reducer for a seawater drilling fluid and a preparation method of the high-temperature-resistant composite filtrate reducer. A main chain of the filtrate reducer is chemically modified by using nanocrystalline cellulose, so that a polymer A-C-C has excellent filtrate reduction performance and thermal stability, the specific high-temperature-resistant filtrate reducer sodium nitrohumate is preferably selected to be compounded with the polymer A-C-C for use, a synergistic effect is exerted, and the performance of the compound filtrate reducer is further improved. The high-temperature-resistant composite filtrate reducer for the seawater drilling fluid has the advantages of excellent filtrate reduction performance, high temperature resistance and the like, the preparation raw materials are low in acquisition difficulty and easy to biodegrade, and the high-temperature-resistant composite filtrate reducer has good environmental protection performance and wide application prospects.

Description

technical field [0001] The invention relates to the technical field of fluid loss reducers for drilling fluids, in particular to a high-temperature resistant composite fluid loss reducer for seawater drilling fluids and a preparation method thereof. Background technique [0002] With the continuous development of oil and gas exploration and development, especially the gradual deepening of offshore exploration, higher requirements are put forward for the performance of drilling fluid additives. Commonly used fluid loss control agents generally have problems such as poor high temperature resistance and poor fluid loss control performance, which not only affect the production of oil and gas wells, but may also cause serious ecological pollution to the operating environment. Aiming at the high temperature resistance performance, many researches are currently focused on the development of copolymers based on sulfonic acid monomers such as AMPS. However, the molecular chains forme...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08F251/02C08F220/56C08F220/58
CPCC09K8/035C08F251/02C09K2208/10C08F220/56C08F220/585
Inventor 赵沿东蔡维良程跃凤郭淑华赵倩
Owner 山东红锦石油技术开发有限公司
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