Oil-based drilling fluid shaft completion cleaning fluid and preparation method thereof

A technology of oil-based drilling fluid and cleaning fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve the problems of unsuitable oil-based drilling fluid and no oil-based drilling fluid, oil-based cleaning fluid, etc.

Inactive Publication Date: 2015-01-07
克拉玛依市金鑫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, due to the protection of oil and gas layers, the reason for using oil-based drilling fluid is that the reservoir is highly water-sensitive. If water-based cleaning fluid is used to Cleaning the oil-based drilling fluid will be completely contradictory and contrary to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, the raw materials of the oil-based drilling fluid wellbore completion cleaning fluid include by weight percentage: 25% to 30% of organic acid solution, 1% to 3% of emulsifier, 0.5% to 0.7% of organic solvent, fast penetrating agent 0.5% to 2%, corrosion inhibitor 0.05% to 0.1%, and the balance of base oil.

Embodiment 2

[0029] Embodiment 2, the raw materials of the oil-based drilling fluid wellbore completion cleaning fluid include by weight percentage: organic acid solution 25% or 30%, emulsifier 1% or 3%, organic solvent 0.5% or 0.7%, fast penetrating agent 0.5% or 2%, corrosion inhibitor 0.05% or 0.1%, and the balance of base oil.

Embodiment 3

[0030] Embodiment 3, the raw materials of the oil-based drilling fluid wellbore completion cleaning fluid include by weight percentage: organic acid solution 25%, emulsifier 1%, organic solvent 0.5%, fast penetrating agent 0.5%, corrosion inhibitor 0.05% and 72.95% base oil.

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PUM

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Abstract

The invention relates to the technical field of drilling fluid cleaning fluids, particularly to an oil-based drilling fluid shaft completion cleaning fluid and a preparation method thereof. The oil-based drilling fluid shaft completion cleaning fluid comprises raw materials in percentage by weight as follows: 25%-30% of an organic acid solution, 1%-3% of an emulsifier, 0.5%-0.7% of an organic solvent, 0.5%-2% of a quick penetrating agent, 0.05%-0.1% of a corrosion inhibitor and the balance of base oil. The oil-based drilling fluid shaft completion cleaning fluid is an oil-based cleaning fluid, is an acid-in-oil emulsion, is applied after open hole completion or screen pipe (slotted pipe) completion, can be used for restoring near-wellbore holes between a shaft and a stratum, can be used for opening an oil and gas channel, has the higher cleaning rate, can be used for clearing away substances adhered to the shaft, can be used for dredging a near-wellbore reservoir channel, can be used for washing a screen pipe (slotted pipe) and can be used for protecting an oil-gas bed.

Description

technical field [0001] The invention relates to the technical field of drilling fluid cleaning fluid, and relates to an oil-based drilling fluid wellbore completion cleaning fluid and a preparation method thereof. Background technique [0002] The ultimate goal of drilling and well completion is to drill the reservoir and form a channel for oil and gas flow to establish good production conditions for oil and gas wells. Any phenomenon that prevents fluid from flowing from the reservoir around the wellbore to the bottom of the well is called damage to the reservoir. Before the oil and gas layers are drilled, the rocks and mineral components of the oil and gas reservoirs, and the fluids they contain are relatively in a physical, chemical, thermodynamic and hydrodynamic equilibrium state. During the construction process, due to the effects of physical and chemical factors, the original equilibrium state may be destroyed, the reservoir will be seriously damaged, and the productiv...

Claims

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Application Information

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IPC IPC(8): C09K8/52
CPCC09K8/52C09K2208/32
Inventor 王茂仁冯建建王晨王军肖达士张梁肖露
Owner 克拉玛依市金鑫科技有限公司
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