Oil-based drilling fluid blocking agent and preparation method thereof

An oil-based drilling fluid and plugging agent technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve problems such as difficulty in uniform dispersion, poor compatibility of base oil, environmental pollution, etc. Filter loss effect, improve plugging performance, cost and environmental protection effect

Inactive Publication Date: 2019-10-01
CNPC BOHAI DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current oil-based drilling fluid plugging agents are mainly asphalt, humic acid, high molecular polymer, and inorganic particle products. Among them, asphalt and humic acid products have the disadvantages of polluting the environment and reducing drilling speed. The use in sensitive areas is limited; polymer products have the disadvantages of high cost and difficulty in degradation; inorganic particle products have the disadvantages of poor compatibility with base oil and difficulty in uniform dispersion and function

Method used

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  • Oil-based drilling fluid blocking agent and preparation method thereof
  • Oil-based drilling fluid blocking agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of oil base drilling fluid plugging agent, its preparation method is as follows:

[0028] S1. Put 100 parts by weight of the olive pomace material on the tray of the blast oven, heat up to 40°C, and dry for 12 hours. During this period, take out the tray every 2 hours to turn the olive pomace material and then put it back in the oven, and continue to bake Dry, stop heating after 12 hours, take it out after cooling to room temperature naturally;

[0029] S2. Pour the product dried in step S1 into a ball mill, add 0.2 parts by weight of magnesium stearate, blend and pulverize, and pass through a 60-mesh sieve to obtain the oil-based drilling fluid plugging agent.

Embodiment 2

[0031] A kind of oil base drilling fluid plugging agent, its preparation method is as follows:

[0032] S1. Put 100 parts by weight of the olive pomace material on the tray of the blast oven, heat up to 40°C, and dry for 12 hours. During this period, take out the tray every 2 hours to turn the olive pomace material and then put it back in the oven, and continue to bake Dry, stop heating after 12 hours, take it out after cooling to room temperature naturally;

[0033] S2. Pour the product dried in step S1 into a ball mill, add 0.2 parts by weight of magnesium stearate, blend and pulverize, and pass through a 100-mesh sieve to obtain the oil-based drilling fluid plugging agent.

Embodiment 3

[0035] A kind of oil base drilling fluid plugging agent, its preparation method is as follows:

[0036] S1. Put 100 parts by weight of the olive pomace material on the tray of the blast oven, heat up to 40°C, and dry for 12 hours. During this period, take out the tray every 2 hours to turn the olive pomace material and then put it back in the oven, and continue to bake Dry, stop heating after 12 hours, take it out after cooling to room temperature naturally;

[0037] S2. Pour the product dried in step S1 into a ball mill, add 0.2 parts by weight of magnesium stearate, blend and pulverize, and pass through a 150-mesh sieve to obtain the oil-based drilling fluid plugging agent.

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Abstract

The invention discloses an oil-based drilling fluid blocking agent and a preparation method thereof. The oil-based drilling fluid blocking agent is prepared from a solid state mixture being 60 to 150meshes prepared by compounding oil-containing plant residue materials containing rich plant fiber and auxiliary materials accounting for 0.2 to 1 percent of the oil-containing plant residue materials,wherein the oil-containing plant residue materials are residue left after the grease removal from the oil-containing plant; the auxiliary materials are at least one kind of materials from calcium carbonate powder, magnesium stearate powder, talcum powder, superfine silica powder and calcium hydrophosphate powder with the mesh number being smaller than or equal to 60 meshes. The blocking agent isobtained through proportionally mixing the oil-containing plant residue materials and then performing drying, crushing, grinding and sieving. The preparation method is simple; the raw materials can beeasily obtained; the cost is low. The oil-based drilling fluid blocking agent has the characteristics of water absorption and oil absorption expansion, deformation capability, degradability, oleophilic performance and easy dispersion; the influence on the viscosity of the drilling fluid is small; waste materials can be reused; the cost is low; the environment is protected.

Description

technical field [0001] The invention relates to the technical field of oilfield plugging agents, in particular to an oil-based drilling fluid plugging agent and a preparation method thereof. Background technique [0002] Oil-based drilling fluid is a drilling fluid system composed of oil as the continuous phase, water as the dispersed phase, and emulsifiers, shearing agents, plugging agents, fluid loss reducers, alkalis and other chemical agents. Compared with water-based drilling fluid, it has the advantages of good lubrication, anti-pollution, high temperature resistance, strong suppression, and protection of oil and gas layers. Therefore, it is more and more widely used in deep and ultra-deep wells, complex structure wells, special formation wells, Extended reach horizontal wells and other difficult wells. [0003] How to improve the plugging performance of oil-based drilling fluid to reduce the fluid loss of drilling fluid, reduce the pressure transmission caused by liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03
CPCC09K8/03C09K2208/08
Inventor 王磊磊张现斌谷艳峰郭剑梅闫晓婷龙涛陈庭贵冯超刘强郭立华张鹏赵大光
Owner CNPC BOHAI DRILLING ENG
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