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Gas oil base invert oil-emulsion drilling fluid and preparation method

A technology for emulsifying drilling fluid and oil-based oil, applied in chemical instruments and methods, drilling compositions, etc., to achieve the effect of strong anti-pollution ability, easy biodegradation and good temperature resistance

Inactive Publication Date: 2012-11-28
COSL CHEM TIANJIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of existing gas-to-oil-based drilling fluids, and solves the salt and temperature resistance of gas-to-oil-based drilling fluids

Method used

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  • Gas oil base invert oil-emulsion drilling fluid and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 Configured gas-to-oil-based emulsion drilling fluid with a density of 1.92 / cm3 and an oil-to-water ratio of 70 / 30

[0047] Measure 245ml of gas-based oil with a graduated cylinder and pour it into a high mixing cup. Add 3.85g of tall oil base hydrolysate after oxidation of main milk and pine pulp, and 7.0g of auxiliary milk-sodium dodecylbenzene sulfonate. Wetting agent-2.45g of the condensation reaction product of fatty acid and polyvinyl polyamine, stir it on a high-speed stirrer at 10000r / min for 5 minutes to dissolve it; add 105ml of 25% calcium chloride aqueous solution and continue stirring for 15 minutes; Then add 7g of organic soil, 10.5g of calcium oxide, 19.25g of filtrate reducer-oxidized asphalt, and continue to stir for 10 minutes; add 605g of barite and continue to stir for 20 minutes, and the required gas-to-oil-based drilling fluid is prepared.

[0048] Put the prepared oil-based drilling fluid into an aging tank, heat it at 200℃ for 16 hours, take ...

Embodiment 2

[0049] The configuration density of Example 2 is 2.12g / cm 3 , A gas-to-oil based emulsion drilling fluid with an oil-water ratio of 80 / 20

[0050] Measure 240ml gas-to-oil with a graduated cylinder and pour it into a high mixing cup, and add 3.3g of tall oil base hydrolysate after oxidation of main milk and pine pulp, and 6.0g of auxiliary milk-sodium dodecylbenzene sulfonate. Wetting agent-2.45g of the condensation reaction product of fatty acid and polyvinyl polyamine, stir on a high-speed stirrer at 11000r / min for 5 minutes to dissolve; add 60ml of 30% calcium chloride aqueous solution, and continue to stir 15 Add 6g of organic soil, 9g of calcium oxide, 16.5g of filtrate reducer-oxidized asphalt, and continue to stir for 10 minutes; add 750g of barite and continue to stir for 25 minutes. The required gas-to-oil-based drilling fluid is prepared.

[0051] Put the prepared oil-based drilling fluid into an aging tank, heat it at 200°C for 16 hours, take it out to cool down, pour it...

Embodiment 3

[0052] The configuration density of Example 3 is 2.45g / cm 3 , A gas-to-oil based emulsion drilling fluid with an oil-water ratio of 90 / 10

[0053] Measure 270ml gas-based oil with a graduated cylinder and pour it into a high mixing cup, and add 2.4g of tall oil base hydrolysate after oxidation of main milk and pine pulp, and 5.40g of auxiliary milk-sodium dodecylbenzene sulfonate. Wetting agent-the condensation reaction product of fatty acid and polyvinyl polyamine 3.0g, stir it on a high-speed stirrer at 12000r / min for 5 minutes to dissolve; add 30ml of 40% calcium chloride aqueous solution and continue stirring for 15 minutes Add 6g of organic soil, 9g of calcium oxide, 16.5g of filtrate reducer-oxidized asphalt, and continue to stir for 15 minutes; add 1160g of barite and continue to stir for 25 minutes. The preparation of the required gas-to-oil-based emulsion drilling fluid is completed.

[0054] Put the prepared oil-based drilling fluid into an aging tank, heat it at 200°C fo...

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Abstract

The invention relates to a gas oil base invert oil-emulsion drilling fluid and a preparation method, wherein the total volume of gas oil and calcium chloride aqueous solution is 100 parts: the volume ratio of oil phase to water phase is between 95:5 and 70:30, and the concentration of calcium chloride aqueous solution is 5%-saturation; the required gas oil, primary emulsion, auxiliary emulsion and wetting agent are added into a high speed mixing beaker, and are mixed at high speed for 2-5 minutes; the calcium chloride aqueous solution is added and mixed at high speed for 15 minutes; organic soil, calcium oxide and a fluid loss agent are added and mixed at high speed for 10 minutes; and the required amount of barite is added according to density, and is mixed at high speed for 25 minutes. The gas oil base invert oil-emulsion drilling fluid is used for overcoming the defects of the existing gas oil base drilling fluid and solving the problems of the salt resistance and temperature resistance of the gas oil base drilling fluid, and can resist the temperature above 200 DEG C.

Description

Technical field [0001] The invention relates to a gas-to-oil-based water-in-oil emulsified drilling fluid, which is an artificially synthesized gas-to-oil-based water-in-oil emulsified drilling fluid used in the field of petroleum geological exploration and development, and belongs to synthetic oil-based water-in-oil emulsion drilling fluids The temperature resistance of the drilling fluid can reach above 200℃. Background technique [0002] Gas-to-oil-based emulsified drilling fluid is a special water-in-oil synthetic oil-based drilling fluid. It is a saturated hydrocarbon drilling fluid with good rheological properties, because gas-to-oil-based drilling fluids have better viscosity. Temperature index and low temperature rheological characteristics, with good environmental acceptability and technical construction safety, so it is widely used in deep water drilling and oil fields with high environmental requirements. [0003] Gas-to-oil-based drilling fluid is a new drilling fluid ...

Claims

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Application Information

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IPC IPC(8): C09K8/36
Inventor 潘代奇李银素姜兰兰曾瑶江宏黄献西刘雪婧荆鹏刘刚罗建生张行知陈俊生
Owner COSL CHEM TIANJIN
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