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A kind of fracturing flowback fluid pretreatment agent and pretreatment method for preparing drilling fluid

A technology of fracturing flowback fluid and pretreatment agent, which is applied in the direction of sedimentation treatment, mining wastewater treatment, and special treatment targets. High utilization rate, easy operation and low processing cost

Active Publication Date: 2022-07-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, to provide a kind of fracturing flowback fluid pretreatment agent and pretreatment method for preparing drilling fluid, which overcomes 1 in the prior art: adopt specialized mechanical equipment to treat the flowback fluid Drainage for gel breaking, ion removal, and sterilization, etc. The technical operation procedures are relatively complicated, and the well site occupies a large area; 2: There are large workloads and potential risks such as equipment transportation, installation, and electricity safety; 3: Existing The technologies are all concentrated on treating the flowback fluid and re-preparing the flowback fluid, but there are basically no issues involved in preparing the drilling fluid after the flowback fluid is treated.

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  • A kind of fracturing flowback fluid pretreatment agent and pretreatment method for preparing drilling fluid

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specific Embodiment approach

[0028] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with this technology, and are not used to limit the conditions that the present invention can be implemented. , any modification of the structure, the change of the proportional relationship or the adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed in the present invention can cover .

[0029] At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used to limit this specification. The implementable scope of the invention, and the change or adjustment of the relative relat...

Embodiment 1

[0032]The present invention discloses a fracturing flowback fluid pretreatment agent for preparing drilling fluid. The parts by weight of the components are: 3-10 parts of hardness remover, 0.2-3 parts of foam inhibitor, 0.5-4 parts of bactericide, 1-5 parts of pH adjuster, 0.2-2 parts of high-valent ion shielding agent, among which pretreatment The weight ratio of agent to fracturing flowback fluid is 1:70~110.

Embodiment 2

[0034] The present invention discloses a fracturing flowback fluid pretreatment agent for preparing drilling fluid. The parts by weight of the components are: 3-10 parts of hardness remover, 0.2-3 parts of foam inhibitor, 0.5-4 parts of bactericide, 1-5 parts of pH adjuster, 0.2-2 parts of high-valent ion shielding agent, among which pretreatment The weight ratio of agent to fracturing flowback fluid is 1:70~110.

[0035] Preferably, the parts by weight of the components are: 5-7 parts of hardness remover, 0.5-1.5 parts of foam inhibitor, 1-2 parts of bactericide, 2-3 parts of pH adjuster, and 0.5-3 parts of high-valent ion shielding agent 1 part, wherein the weight ratio of the pretreatment agent to the fracturing flowback fluid is 1:80~100.

[0036] Preferably, the parts by weight of the components are: 6 parts of hardness remover, 1.2 parts of foam inhibitor, 1 part of bactericide, 2 parts of pH adjuster, and 0.6 part of high-valent ion shielding agent, wherein the pretrea...

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Abstract

The present invention discloses a fracturing flowback fluid pretreatment agent and a pretreatment method for preparing drilling fluid. composition, wherein the parts by weight of each component are: hardness remover 3-10 parts, foam inhibitor 0.2-3 parts, bactericide 0.5-4 parts, pH adjuster 1-5 parts, high-valent ion shielding agent 0.2-2 parts , in which the weight ratio of pretreatment agent to fracturing flowback fluid is 1:70~110. The invention is easy to operate and low in processing cost, and is especially suitable for the drilling and test integration operation site of large well groups in Changqing tight oil and gas field. The bacterial content is effectively controlled, which can avoid the degradation, fermentation and failure of the prepared drilling fluid additives due to high bacterial content, which seriously affects the stability of the drilling fluid system.

Description

technical field [0001] The invention belongs to the technical field of oilfield drilling, and in particular relates to a fracturing flowback fluid pretreatment agent and a pretreatment method for preparing drilling fluid. Background technique [0002] The fracturing process is the main measure to stimulate the production of oil wells. It is widely used in various oil fields. During the fracturing operation in the oil field, a large amount of flowback fluid will be continuously produced. Due to the characteristics of poor performance, fracturing flowback fluid has become one of the main pollutants in oilfields. After the flowback liquid is treated, it is difficult to discharge, and the treatment cost is high, which has become an important factor restricting the development of oilfields and environmental protection. [0003] The fracturing flowback fluid produced by the Changqing Oil and Gas Field due to reservoir reconstruction is over one million cubic meters each year. Due...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/10
CPCC02F9/00C02F1/66C02F5/14C02F1/50C02F2001/007C02F2303/04C02F2103/10C02F2303/12
Inventor 贾俊张小平陈在君杨斌陈磊陈恩让吴超赵建震赵雷张雅楠王京光董宏伟凡帆刘伟王勇强尹敬君郑玉辉胡久艳赵海锋郝超段成才张振活
Owner BC P INC CHINA NAT PETROLEUM CORP
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