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Broad spectrum type high-efficient blocking agent for drilling fluid

A broad-spectrum, plugging agent technology, applied in the field of petroleum drilling aids, to achieve the effect of wide application range, no environmental pollution, and protection of oil and gas layers

Active Publication Date: 2013-06-12
石家庄华莱鼎盛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technologies have not provided specific guidance on how to make the plugging agent for drilling fluid have a broad-spectrum plugging effect and have a good plugging effect on fractures from millimeter to micron.

Method used

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  • Broad spectrum type high-efficient blocking agent for drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: The broad-spectrum high-efficiency plugging agent for drilling fluid is mainly composed of paraffin-coated polymer water-absorbing swelling resin (the surface of which is coated with paraffin), supplemented by micro-elastic plugging materials chemical fiber powder, cotton Cashmere powder, peanut shell powder, nanmu powder, asphalt powder, walnut shell powder for bridging and plugging materials, and superfine calcium carbonate for rigid plugging materials are mixed, and the weight percentage and particle size of each component are as follows: 40% polymer water-absorbing swellable resin covered, particle size is 300 mesh; chemical fiber powder 15%, particle size is 150 mesh; lint powder 4%, particle size is 100 mesh; peanut shell powder 10%, particle size is 80 mesh; Phoebe powder 10% %, the particle size is 100 mesh; asphalt powder 10%, the particle size is 80 mesh; walnut shell powder 6%, the particle size is 120 mesh; superfine calcium carbonate 5%, the parti...

Embodiment 2

[0020] Example 2: The broad-spectrum high-efficiency plugging agent for drilling fluid is mainly composed of polymer water-absorbing swelling resin coated with paraffin, supplemented by micro-elastic plugging materials such as chemical fiber powder, cotton wool powder, peanut shell powder, Phoebe powder, asphalt powder, walnut shell powder as a bridging and sealing material, and superfine calcium carbonate as a rigid sealing material are mixed. The above polymer water-absorbing swelling resin coated with paraffin is AMPS-AM-AA terpolymer polymer water-absorbing swelling resin.

[0021] The weight percent and particle size of each component are: 30% polymer water-absorbing swelling resin coated with paraffin wax, with a particle size of 300 mesh; 20% chemical fiber powder, with a particle size of 150 mesh; 3% cotton wool powder, with a particle size of 100 mesh; Peanut shell powder 10%, particle size is 80 mesh; Phoebe powder 10%, particle size is 100 mesh; asphalt powder 15%, ...

Embodiment 3

[0027] Example 3: The broad-spectrum high-efficiency plugging agent for drilling fluid is mainly composed of polymer water-absorbing swelling resin coated with paraffin, supplemented by micro-elastic plugging materials such as chemical fiber powder, cotton wool powder, peanut shell powder, Phoebe powder, asphalt powder, walnut shell powder as a bridging and sealing material, and superfine calcium carbonate as a rigid sealing material are mixed. The above polymer water-absorbing swelling resin coated with paraffin is AMPS-AM-AA terpolymer polymer water-absorbing swelling resin.

[0028] The weight percentage and particle size of each component are: 30% polymer water-absorbing swelling resin coated with paraffin, with a particle size of 270 mesh; 20% chemical fiber powder, with a particle size of 150 mesh; 3% cotton linter powder, with a particle size of 80 mesh; Peanut shell powder 10%, particle size is 80 mesh; Phoebe powder 10%, particle size is 80 mesh; asphalt powder 15%, p...

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Abstract

The invention discloses a broad spectrum type high-efficient blocking agent for drilling fluid, which comprises the following components in percentage by weight and granularity: 20-50 percent of polymeric water absorbent swollen resin which is coated by paraffin, wherein the granularity is 270-400 meshes; 10-20 percent of chemical fiber, wherein the granularity is 140-170 meshes; 1-5 percent of velveteen powder, wherein the granularity is 80-120 meshes; 5-15 percent of peanut shell powder, wherein the granularity is 60-100 meshes; 5-15 percent of phoebe zhennan powder, wherein the granularity is 80-120 meshes; 10-20 percent of asphalt powder, wherein the granularity is 60-100 meshes;1-10 percent of walnut shell powder, wherein the granularity is 100-140 meshes; and 1-10 percent of super-fine calcium carbonate, wherein the granularity is 900-1100 meshes; and the polymeric water absorbent swollen resin which is coated by the paraffin is AMPS-AM-AA terpolymer polymeric water absorbent swollen resin. The broad spectrum type high-efficient blocking agent for the drilling fluid has the effect of broad spectrum blocking, has the good blocking effect on cracks with the size from millimeter dimension to micron dimension, dose not damage an oil and gas reservoir, can protect a hydrocarbon reservoir, does not have the bad influence on property of the drilling fluid, and is an excellent plugging agent while drilling.

Description

technical field [0001] The invention relates to a petroleum drilling aid, in particular to a broad-spectrum high-efficiency plugging agent for drilling fluid. Background technique [0002] At present, in oil drilling operations, in order to prevent the water in the drilling fluid from entering the formation and causing drilling accidents, the construction party usually adds a plugging agent to solve the above problems. At present, the most widely used plugging agents are single pressure sealing agent and bridging plugging agent, but these two kinds of plugging agents do not have a broad-spectrum plugging effect, and can only target fractures with a specific width. The protective effect of the layer is not good, which has a great impact on the performance of the drilling fluid and affects the drilling speed. CN102127400A discloses a low-permeability reservoir plugging agent for drilling fluid protection, comprising the following components: 10-40 parts of acid-soluble fiber,...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/03
Inventor 陈利赵秀平
Owner 石家庄华莱鼎盛科技有限公司
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