Production method of composite preventive salt for salt prevention and blocking removal in shaft

A production method and a technology for preventing salt, which are applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems such as the effect of dosing is not very obvious, and achieve the advantages of removing inorganic blockage, inhibiting a large amount of salt precipitation, and improving the solubility of NaCl. Effect

Inactive Publication Date: 2019-05-24
曹高维
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Problems solved by technology

The well started to be washed again on the 6th and 7th day, indicating that the effect of dosing is not very obvious for wells with serious salt accumulation

Method used

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  • Production method of composite preventive salt for salt prevention and blocking removal in shaft
  • Production method of composite preventive salt for salt prevention and blocking removal in shaft
  • Production method of composite preventive salt for salt prevention and blocking removal in shaft

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] see Figure 1 to Figure 9 , the present invention provides a technical solution: a composite anti-salt production method for salt prevention and plugging removal in a wellbore, comprising the following steps:

[0034] S1: Prepare 2-9 parts of petroleum ether, 4-9 parts of cyclopentanol, 15-22 parts of deionized water, 6-10 parts of organic acid, 2-9 parts of inorganic acid, 11-19 parts of acidifying corrosion inhibitor, 9-16 parts of swel...

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Abstract

The invention discloses a production method of a composite preventive salt for salt prevention and blocking removal in a shaft. The composite anti-salt production method comprises the steps of S1, preparing, 2-9 parts of petroleum ether, 4-9 parts of cyclopentanol, 15-22 parts of deionized water, 6-10 parts of an organic acid, 2-9 parts of an inorganic acid, 11-19 parts of an acidizing corrosion inhibitor, 9-16 parts of an anti-swelling agent, 10-13 parts of an activator, 12-16 parts of a shielding agent, 8-11 parts of a regulating agent, 11-15 parts of a complex cleanup additive, and 3-8 parts of a dispersant; S2, grinding the solid particles of the step S1; S3, adding the components of the step S1 into a reactor, and mixing; S4, extracting the reacted material to obtain a composite preventive salt. The composite preventive salt agent helps improve NaCl solubility, the NaCl with improved solubility exists in ion form, and massive salt deposition from a formation is inhibited.

Description

technical field [0001] The invention relates to the technical field of salt prevention and plugging removal in wellbore, in particular to a composite salt prevention production method for salt prevention and plugging removal in wellbore. Background technique [0002] Salt formation in oil wells in Wendong inter-salt reservoir has the following characteristics: the higher the water content of crude oil, the heavier the salt formation in oil wells; another factor causing salt formation in oil wells is the change of the state of saline fluid, and choosing an appropriate flow rate can reduce the speed of salt formation. It even prevents salt formation: [0003] 1. The influence of the oil-water ratio of the produced fluid on salt accumulation: From the investigation of the current situation of oil well salt accumulation, it is reflected that with the prolongation of production time, the properties of the oil well produced fluid change, the salt accumulation period shortens, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/528C09K8/03
Inventor 曹高维
Owner 曹高维
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