Multifunctional

An additive and drilling fluid technology, applied in the field of drilling fluid additives, can solve the problems of difficult control of rheological properties, high final shear force of drilling fluid, restrict development and application, etc., achieve good lubrication and oil layer protection effects, and inhibit shale expansion. , mild performance

Inactive Publication Date: 2007-02-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MMH positive gel has the disadvantages of insufficient inhibition of mudstone, high final shear force of drilling fluid, large filtration loss, few compatible treatment agents, and difficult control of rheological properties.
The performance of black organic positive gel to protect oil and gas layers has been greatly improved compared with MMH positive gel, but due to its own fluorescence, which affects mud logging and has environmental pollution problems, its further development and development are largely restricted. application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The multifunctional drilling fluid additive is an emulsion with an average particle size of 220-400nm. The components are as follows, all in parts by weight, and the total amount is 100 parts:

[0035] 15 parts of paraffin, 15 parts of white oil, 2 parts of nonionic surfactant Tween 80, 2 parts of nonionic surfactant Span 80, 1 part of cationic surfactant cetyltrimethylammonium bromide , 65 parts of water.

[0036] Preparation:

[0037] By mixing 15 parts of paraffin and 15 parts of white oil into the oil phase; 2 parts of nonionic surfactant Tween 80, 2 parts of Span 80 and 1 part of cationic surfactant cetyltrimethylammonium bromide The mixed system is a mixed surfactant; add the oil phase and the mixed surfactant to the reactor and heat it to 80°C; heat the water to 70°C; add the preheated water to the reactor until the system becomes opaque and viscous Until the thick gel phase (that is, the emulsion changes from W / O type to O / W type), stir at 2000-3000rpm for 10m...

Embodiment 2

[0050] As described in Example 1, the difference is:

[0051] The multifunctional drilling fluid additive is an emulsion, the average particle size is 150-300nm, and the components are as follows, all in parts by weight, and the total amount is 100 parts:

[0052] 20 parts of paraffin, 20 parts of white oil, 4.5 parts of nonionic surfactant Tween 20, 4.5 parts of Span 80, 1 part of cationic surfactant cetyltrimethylammonium chloride, 50 parts of water.

[0053] Oil ratio (w / w)

Embodiment 3

[0055] As described in Examples 1 and 2, the difference is:

[0056] The multifunctional drilling fluid additive is an emulsion with an average particle size of 120-400nm. The components are as follows, all in parts by weight, and the total amount is 100 parts:

[0057] 20 parts of paraffin, 10 parts of white oil, 3.5 parts of nonionic surfactant Tween 80, 4.5 parts of Span 60, 2 parts of cationic surfactant tetradecyltrimethylammonium bromide, 60 parts of water.

[0058] Oil ratio (w / w)

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Abstract

The invention discloses a multifunctional drilling fluid additive. By 100 weight percentages, the components are: 10~30 wt. paraffin, 10~30 wt. white oil, 5~15 wt. non-ionic surface active agent, 0.02~5 wt. cationic surface active agent and water. The invention also discloses the method for preparation of the drilling fluid additive: mixing the paraffin and white oil into oil phase; mixing the non-ionic surface active agent and cationic surface active agent into mixed surface active agent; adding the oil phase and mixed surface active agent into the reactor, heating; then adding proper volume preheating water into the reactor till opaque viscous gel phase occurring in the architecture; agitating with rotary speed of 2000~3000rpm and keep the emulsifying temperature during reaction; adding the rest of water into the reactor and stop heating, agitating with 1000rpm, make the emulsion cool down to ambient temperature and get the paraffin pinpoint emulsion.

Description

technical field [0001] The invention relates to a drilling fluid additive for petroleum drilling engineering, a preparation method and application thereof. Background technique [0002] In oil drilling engineering, drilling fluid is essential. It can carry and suspend cuttings, stabilize well wall and balance formation pressure, cool and lubricate drill bits and drilling tools, and transmit hydrodynamic force, etc. The performance of drilling fluid directly affects the quality of drilling well and drilling speed. Therefore, it is necessary to add a variety of treatment agents to the drilling fluid to improve and stabilize the performance of the drilling fluid, and to adjust and maintain the drilling fluid at any time so that the performance of the drilling fluid meets the requirements of the formation and drilling technology. [0003] Drilling fluids can be divided into oil-based drilling fluids, water-based drilling fluids, gas-based drilling fluids and synthetic-based dri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/04
Inventor 孙德军刘伟荣苏长明王宝锋郭保雨
Owner SHANDONG UNIV
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