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Oil-based drilling fluid with high temperature and high pressure resistance

An oil-based drilling fluid, high temperature resistance technology, applied in the field of oil-based drilling fluid, can solve the problems of poor high temperature and high pressure resistance, environmental pollution, high toxicity, etc., achieve high viscosity and shear force, meet cuttings carry, low toxicity Effect

Inactive Publication Date: 2016-02-24
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, one is that the existing oil-based drilling fluids are highly toxic and cause serious environmental pollution; the other is that the existing oil-based drilling fluids have poor resistance to high temperature and high pressure

Method used

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  • Oil-based drilling fluid with high temperature and high pressure resistance
  • Oil-based drilling fluid with high temperature and high pressure resistance
  • Oil-based drilling fluid with high temperature and high pressure resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Preparation method and basic rheological parameter measurement of resistant high temperature and high pressure oil-based drilling fluid

[0019] (1) The preparation method is as follows:

[0020] Calculated based on the amount added per 300g of No.5 white oil, the preferred mass parts of the above components are: 15g homemade organic soil HIS, 12g emulsifier, 12g fluid loss reducer, 3g wetting agent TWEEN-80, 4.5g Alkalinity regulator, 4.5g weighting agent.

[0021] 1) First, weigh out No. 5 white oil, emulsifier, homemade organic soil, fluid loss agent, wetting agent, alkalinity regulator and weighting agent according to the above-mentioned ratio.

[0022] 2) Add No. 5 white oil to the container (mud cup), heat to 180℃ at 10000r / min, add 180℃ oxidized asphalt powder and stir for 30min, cool to room temperature and then add dodecylbenzene sulfonic acid in order Sodium SDBS, homemade organic soil (HIS), wetting agent (TWEEN-80), alkalinity regulator (CaO) and weighting agent...

Embodiment 2

[0042] High temperature and high pressure resistant oil-based drilling fluid, which is prepared by mixing homemade organic soil, emulsifier, fluid loss agent, wetting agent, alkalinity regulator, and weighting agent in parts by weight. Calculated by the amount added in the oil, the mass parts of the above components are: 10g homemade organic soil HIS, 10g sodium dodecylbenzene sulfonate SDBS, 10g 180℃ oxidized asphalt powder, 2g TWEEN-80, 3gCaO, 3g recrystallized stone. Others are the same as in Example 1.

Embodiment 3

[0044] High temperature and high pressure resistant oil-based drilling fluid, which is prepared by mixing homemade organic soil, emulsifier, fluid loss agent, wetting agent, alkalinity regulator, and weighting agent in parts by weight. Calculated by the amount added in the oil, the mass parts of the above components are: 20g homemade organic soil HIS, 15g sodium dodecylbenzene sulfonate SDBS, 15g 180℃ oxidized asphalt powder, 5g TWEEN-80, 6gCaO, 6g recrystallized stone. Others are the same as in Example 1.

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Abstract

The invention relates to an oil-based drilling fluid with high temperature and high pressure resistance. The oil-based drilling fluid is prepared by mixing self-made organic soils, an emulsifier, a fluid loss additive, a wetting agent, an alkalinity conditioning agent and a weighting agent according to weight parts. The oil-based drilling fluid has a simple preparation method and is easy to operate on-site; the oil-based drilling fluid has good rheological property, good fluid loss property, good high temperature and high pressure resistance and good inhibition, thereby meeting the requirements for carrying rock debris and stable borehole wall during drilling, and reducing possibility of clamping drill bits.

Description

Technical field [0001] The invention relates to an oil-based drilling fluid, in particular to an oil-based drilling fluid capable of resisting high temperature and high pressure and easy hydration, dispersion and expansion of drilling stratum, and is suitable for shale and high temperature and high pressure well section drilling. Background technique [0002] Oil-based drilling fluid has excellent high temperature and high pressure resistance and lubrication performance, and is suitable for high temperature and high pressure wells, deep wells and ultra-deep wells. With the complexity of drilling strata, the requirements for drilling fluid in the drilling process become more and more stringent. Compared with traditional water-based drilling fluids, oil-based drilling fluids have excellent lubrication and inhibition properties, and have excellent protection for special formations that are easy to hydrate and swell and hydrated and dispersed shale layers. They can strengthen the wel...

Claims

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Application Information

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IPC IPC(8): C09K8/32
CPCC09K8/32
Inventor 杨双春付龙张然潘一秦博张秋实荣继光王璐张亮王鹏
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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