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Flow type regulator for oil-based drilling fluid as well as preparation method thereof

A flow pattern regulator, oil-based drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of inability to meet oil-based drilling fluid flow pattern regulation requirements, limited sources, and increased viscosity, etc. To achieve the effect of increasing viscosity and cutting, improving rheological properties, and increasing plastic viscosity

Inactive Publication Date: 2018-09-21
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main component of flow regulators commonly used abroad is polyamide with large molecular weight, which has a good cutting effect and has little effect on the viscosity of oil-based drilling fluids. However, the price is high and the source is limited. There is a big gap between domestic products and foreign countries. The increase in viscosity is accompanied by a sharp increase in viscosity, which cannot meet the flow pattern adjustment requirements of oil-based drilling fluids

Method used

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  • Flow type regulator for oil-based drilling fluid as well as preparation method thereof
  • Flow type regulator for oil-based drilling fluid as well as preparation method thereof
  • Flow type regulator for oil-based drilling fluid as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Weigh 6g of bentonite, and pulverize the bentonite in a pulverizer (2000rpm) for 2min, then wash and dry in turn to obtain purified soil; pulverize the purified soil, add 80mL of water to it, stir to make a stable suspension, add carbonic acid The sodium bentonite was reacted for 30 minutes, dried, ground, and sieved to obtain sodium bentonite; a quaternary ammonium salt cationic surfactant and a sulfonate anionic surfactant were selected to perform a composite modification on the sodium bentonite to obtain organic soil, wherein the modified The temperature is 75°C, the amount of quaternary ammonium salt cationic surfactant is 6mmol, the amount of sulfonate anionic surfactant is 4mmol, and the reaction time of compound modification is 1.5h; stir evenly, dry and pulverize to obtain Compound modified organic soil.

Embodiment 2

[0067] Weigh 6g of bentonite, and pulverize the bentonite in a pulverizer (2000rpm) for 2min, then wash and dry in turn to obtain purified soil; pulverize the purified soil, add 80mL of water to it, stir to make a stable suspension, add carbonic acid The sodium bentonite was reacted for 30 minutes, dried, ground, and sieved to obtain sodium bentonite; a quaternary ammonium salt cationic surfactant and a sulfonate anionic surfactant were selected to perform a composite modification on the sodium bentonite to obtain organic soil, wherein the modified The temperature is 85°C, the amount of quaternary ammonium salt cationic surfactant is 8mmol, the amount of sulfonate anionic surfactant is 6mmol, and the reaction time of compound modification is 2h; stir evenly, dry and pulverize to obtain compound Modified organic soil.

Embodiment 3

[0069] Weigh 6g of bentonite, and pulverize the bentonite in a pulverizer (2000rpm) for 2min, then wash and dry in turn to obtain purified soil; pulverize the purified soil, add 80mL of water to it, stir to make a stable suspension, add carbonic acid The sodium bentonite was reacted for 30 minutes, dried, ground, and sieved to obtain sodium bentonite; a quaternary ammonium salt cationic surfactant and a sulfonate anionic surfactant were selected to perform a composite modification on the sodium bentonite to obtain organic soil, wherein the modified The temperature is 95°C, the amount of quaternary ammonium salt cationic surfactant is 10mmol, the amount of sulfonate anionic surfactant is 8mmol, and the reaction time of composite modification is 2.5h; stir evenly, dry and pulverize to obtain Compound modified organic soil.

[0070] The concrete formula of above-mentioned each example is as shown in table 1 below:

[0071] Table 1 Experimental synthesis reaction conditions

[0...

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Abstract

The invention discloses a flow type regulator for oil-based drilling fluid as well as a preparation method thereof. The flow type regulator is prepared by compounding composite modified organic soil and modified thermoplastic elastic resin according to a certain proportion, wherein the composite modified organic soil is formed by performing composite modification on sodium bentonite; and the modified thermoplastic elastic resin is formed by grafting glycidyl methacrylate (GMA) on thermoplastic elastic resin ABMS. Compared with the prior art, the flow type regulator for oil-based drilling fluid, which is provided by the invention, can improve the dynamic shearing force of the oil-based drilling fluid and improve the rheological property of the oil-based drilling fluid on the premise of notimproving the plastic viscosity obviously, and can enhance the suspending property and the rock debris carrying properties of the oil-based drilling fluid.

Description

technical field [0001] The invention relates to the technical field of chemicals for oil-based drilling fluid, in particular to a flow pattern regulator for oil-based drilling fluid and a preparation method thereof. Background technique [0002] With the increasing demand for energy in countries around the world, the stratum and drilling techniques of oil and gas exploration are becoming more and more difficult, and the proportion of exploration and development of deep wells, ultra-deep wells, and unconventional oil reservoirs is also increasing. Downhole complex situations such as well wall stability and high temperature resistance caused by it are also emerging continuously. These problems put forward higher and higher requirements for drilling fluid. [0003] Oil-based drilling fluid is a drilling fluid in which oil is the continuous phase. Compared with water-based drilling fluids, the main characteristics of oil-based drilling fluids are high temperature resistance, s...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/03C09K8/24
CPCC09K8/03C09K8/035C09K8/24
Inventor 刘均一陈二丁郭保雨邱维清王宝田张海青王俊蒋莉王旭东赵红香
Owner 中石化石油工程技术服务有限公司
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