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Industrial acidification system and method for offshore oil fields and oil-water wells

A factory-like, oilfield technology, applied in earthwork drilling, wellbore/well components, cleaning equipment, etc., can solve problems such as high risk of platform hoisting and installation, high cost of equipment relocation, and difficult resource organization, etc., to optimize personnel and equipment configuration, reduce relocation costs, relocation and hoisting risks, and save operating time

Inactive Publication Date: 2016-10-26
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology

[0007] In order to achieve the above-mentioned purpose, the present invention aims to solve the difficulties in resource organization, high cost of equipment relocation (especially the workover equipment and other procedures in the wellbore preparation stage before acidizing construction), high risk of platform hoisting and installation, and various construction procedures in the original acidizing mode. a series of questions

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  • Industrial acidification system and method for offshore oil fields and oil-water wells
  • Industrial acidification system and method for offshore oil fields and oil-water wells

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Embodiment Construction

[0030] Hereinafter, the factory acidizing system and method for oil and water wells in offshore oil fields of the present invention will be described in detail.

[0031] figure 1 A schematic construction layout diagram of a factory acidizing system for oil and water wells in an offshore oil field is shown according to an exemplary embodiment of the present invention.

[0032] Such as figure 1 As shown, according to an exemplary embodiment of the present invention, the industrialized acidizing system for oil and water wells in offshore oilfields includes an acid solution preparation unit 10 , an acidification construction unit 20 and a raffinate recovery unit 30 adjacent to each other. Among them, the acid liquid preparation unit 10 is used for the storage of raw materials and the preparation of the acidizing working fluid (hereinafter referred to as acid liquid), the acidizing construction unit 20 is used for carrying out acidizing construction operations on each oil and wate...

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Abstract

The invention discloses an industrial acidification system and method for offshore oil fields and oil-water wells. The industrial acidification system comprises an acid liquid preparation unit, an acidizing treatment unit and a residual liquid recycling unit which are adjacent to one another. The acid liquid preparation unit is connected with a wellhead of one oil-water well or wellheads of the multiple oil-water wells in the acidizing treatment unit through an acid injection pipeline. An acid injection adjusting subunit, a control subunit and a data analyzing subunit are arranged on the acid injection pipeline. Producing wells of the one or more oil-water wells are connected with the residual liquid recycling unit through a liquid return pipe. Flowback residual liquid is neutralized in the residual liquid recycling unit and returned. The industrial acidification method comprises the following steps that the industrial acidification system for the offshore oil fields and the oil-water wells is obtained by utilizing and connecting an offshore oil field production platform and anchoring arrangement; acidizing treatment preparation is conducted; industrial acidizing treatment is conducted on the oil-water wells through the industrial acidification system for the offshore oil fields and the oil-water wells; and acidification aftertreatment is conducted according to the types of the oil-water wells.

Description

technical field [0001] The invention relates to the technical field of acidizing oil and water wells in offshore oil fields, and more specifically relates to a factory acidizing system and method for oil and water wells in offshore oil fields. Background technique [0002] Due to factors such as the harsh environment and relatively high production costs of offshore oilfield production platforms, economic exploitation can only be achieved by forming a production capacity scale. Therefore, in order to achieve the greatest economic benefits, it is important to increase the oil recovery rate of the production platform within the production cycle. One of the main pursuit goals of the development. [0003] There are mainly two types of wells for oil and water wells in offshore oilfield production platforms, oil production wells and water injection wells. With the increase of the production cycle of oil production wells, due to the gradual consumption of formation energy, the prod...

Claims

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Application Information

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IPC IPC(8): E21B37/06
CPCE21B37/06
Inventor 刘平礼刘光成刘义刚刘长龙赵立强山金城高尚罗志锋郑举李年银王天慧符扬洋张岺高建崇
Owner CHINA NAT OFFSHORE OIL CORP
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