Oil displacement type slickwater well washing blockage removal construction method

A construction method and slick water technology, which can be used in flushing wellbore, earthwork drilling, wellbore/well components, etc., can solve problems such as secondary pollution of formations, reduce pollution damage, solve secondary pollution, and improve oil well production and the effect of oil recovery

Pending Publication Date: 2022-05-06
延长油田股份有限公司南泥湾采油厂
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Problems solved by technology

However, under the existing technology, the guar gum well flushing fluid or plugging removal fluid cannot be completely discharged back into the formation, which may easily cause secondary pollution of the formation, and lacks the synergistic effect of "well cleaning + plugging removal + huff and puff + oil displacement" to improve the oil quality of the reservoir. recovery factor

Method used

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  • Oil displacement type slickwater well washing blockage removal construction method
  • Oil displacement type slickwater well washing blockage removal construction method

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The oil displacement type slick water washing well plugging removal construction method of the present invention, refer to figure 1 , including the following steps:

[0029] Step 1, determine the formulation of the slick water washing fluid in the target interval; specifically:

[0030] The composition and proportion of the well flushing fluid are: 0.1% drag reducer + 0.2% multifunctional additive + 0.05% bactericide + 0.5% HE-BIO biological oil displacement agent + 99.15% water.

[0031] Among them, the role of JHFR-2 drag reducer is mainly to prevent the transition from laminar flow to turbulent flow or to reduce the degree of turbulent flow. It is characterized by self-reflux, no residue, and is an environmentally friendly and low-damage nano-slippery water system.

[0032] JHFD-2 multifunctional additive has anti-swelling effect....

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Abstract

The invention discloses an oil displacement type slickwater well washing blockage removal construction method, which utilizes slickwater to wash a well, carry sand and dredge a shaft, and the slickwater has the effects of salt resistance, resistance reduction, swelling prevention and the like, so that the pollution damage to a stratum can be reduced; in addition, oil-displacing agent well washing fluid is injected through a pump, and the process technology for improving the recovery efficiency by integrating well washing, plug removal, huff and puff and oil displacement is achieved. Compared with a conventional well washing and plug removal technology, the method has obvious progress, the secondary pollution to a reservoir is solved, and the oil well yield and the crude oil recovery rate are improved.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and relates to an oil displacement type slippery water washing well plugging removal construction method. Background technique [0002] Conventional well flushing is to use pump injection equipment to inject active water or guar gum liquid or guar gum flowback fluid with a certain viscosity into the wellbore, and carry sand, wax and other impurities in the wellbore to the surface, so as to achieve the purpose of dredging the wellbore. [0003] Conventional plugging removal is to remove blockages in the formation, such as asphalt, colloid, wax, Fe, etc., and at the same time degrade fracturing fluid residues to remove pollution and blockage near the wellbore. [0004] As the means to increase the production of oil wells, the two technologies of well washing and plugging removal have the same purpose, both of which are to dredge the seepage channel of crude oil and relieve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/00E21B43/27
CPCE21B21/00E21B43/27
Inventor 李平樊平天呼园平王亚鹏余维初隋宝新李新石昊
Owner 延长油田股份有限公司南泥湾采油厂
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