Horizontal well volume fracturing tubular column and method based on conventional oil tube pressure dragging

A technology of dragging under pressure and volume fracturing is applied in the fields of fluid extraction, earthwork drilling, wellbore/well components, etc., which can solve the problems of prolonging construction time and increasing construction cost, improving construction efficiency and reducing construction cost. , the effect of shortening the construction time

Active Publication Date: 2014-11-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that in the existing volumetric fracturing construction process, it is necessary to releas

Method used

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  • Horizontal well volume fracturing tubular column and method based on conventional oil tube pressure dragging
  • Horizontal well volume fracturing tubular column and method based on conventional oil tube pressure dragging

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Embodiment Construction

[0030] In order to overcome the problems in the existing volumetric fracturing construction process, it is necessary to release the formation pressure through spraying to carry out the dragging operation of the pipe string, which prolongs the construction time and increases the construction cost. This embodiment provides a horizontal well volumetric fracturing string based on conventional tubing dragging under pressure, such as figure 1 As shown, the tubing 8 is included, and the horizontal section of the tubing 8 is sequentially connected with a closable hydraulic injection tool 4, a differential pressure control circulation valve 5, a packer 6, and a guiding centralizer 7. The hydraulic injection tool 4, pressure The connections between the differential control circulation valve 5, the packer 6 and the guiding centralizer 7 are threaded connections, the hydraulic injection tool 4 is a mechanically closed hydraulic spray gun, and the packer 6 is a mechanical compression packer...

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Abstract

The invention belongs to the technical field of ultra-low permeability reservoir reform, and particularly relates to a horizontal well volume fracturing tubular technological column and method based on conventional oil tube pressure dragging. The horizontal well volume fracturing tubular column and method are used for oil horizontal well volume fracturing technology. A conventional oil tube is adopted for conveying, a packer packs a constructed layer, hydraulic sand blasting perforation is carried out through hydraulic sand blasting, a ground annular preventer and a fracturing tree pressure dragging tubular column are combined to achieve oil and gas horizontal well continuous subsection volume fracturing construction, the problems that in an existing volume fracturing construction technological process, tubular column dragging operation can be carried out by releasing formation pressure, construction time is prolonged, and the constriction cost is increased are solved, construction time is shortened, construction efficiency is improved, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of ultra-low permeability reservoir reconstruction, is used for volume fracturing technology of oil wells and horizontal wells, and in particular relates to a horizontal well volume fracturing tube process column and a fracturing method based on conventional tubing dragging under pressure. Background technique [0002] With the further development of the oilfield, the horizontal well volume fracturing method, as an efficient stimulation method, will be the main stimulation method for ultra-low permeability reservoirs. The volumetric fracturing technology has the characteristics of large fluid volume, large displacement, and large sand volume. The pump injection in the tubing cannot meet the design displacement requirements, and it needs to be injected into the tubing and the casing annulus at the same time. At present, volume fracturing of horizontal wells in some oilfields largely adopts "packers to isolate...

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Application Information

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IPC IPC(8): E21B43/26E21B43/114
Inventor 孙虎王祖文隆世明苏敏文邓小强邓继学李尊团宁治军张文许建伟王建树李景彬安永江
Owner BC P INC CHINA NAT PETROLEUM CORP
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