Once tubular column process for combination oil production by multiple fracturing for oil gas well

A technology for layered fracturing and oil and gas wells, applied in the direction of drilling pipes, casings, production fluids, etc., can solve the problems of intensified conflicts between layers, difficulty in achieving fracturing effects, etc., achieve low operational risks, increase production and production effects , The effect of shortening the working time

Inactive Publication Date: 2009-04-29
CNPC GREATWALL DRILLING ENG
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Problems solved by technology

Due to the different formation parameters and characteristics such as permeability and porosity of various reservoirs of oil a

Method used

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  • Once tubular column process for combination oil production by multiple fracturing for oil gas well

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Embodiment Construction

[0010] The implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0011] As shown in the figure, the oil and gas well layered fracturing combined production process string given in this embodiment has three sets of formations. Hydraulic anchors 3, 6, 9 and packers 4, 7, 10 are respectively assembled on the pipe string above the corresponding parts of the three layers, and sliding sleeves 5 are respectively installed at the parts corresponding to the first and second layers. , 8, a ball seat 11 is provided at the lower end of the pipe string. In the figure, the subject matter represented by each label is as follows:

[0012] 1- oil pipe; 2- casing; 3, 6, 9- hydraulic anchor; 4, 7, 10- separator; 5, 8- sliding sleeve; 11- ball seat; 12, 13, 14- oil layer.

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Abstract

The invention relates to a process for fracturing reconstruction and extraction for oil and gas well in oil field. In the process, different fracture technology parameters are determined based on geology materials, then down-hole tools such as a hydraulic anchor, a packer, a sliding sleeve, a ball cup and the like are put into the well in order, the packer is packed and the hydraulic anchor is anchored by once tamping, then deliver balls perform corresponding fracturing reconstruction to the oil gas reservoirs through the switch function of the sliding sleeves, and after the construction works are completed, the merged extraction can be performed. The process determines corresponding fracture pipe string structures based on different reservoirs and different fracture parameters, can realize the selective fracture reconstruction and commingled production mode for the reservior by onetime, has full controllability for each reservior fracture order, has little work risk, can greatly shorten the operation time of fracture construction, and can achieve the purpose of improving the yield of the oil and gas well and the extraction effect.

Description

Technical field: [0001] The invention relates to a process for fracturing reconstruction and exploitation of oil and gas wells in an oil field, which belongs to the category of petroleum exploitation technology. Background technique: [0002] In the process of oil field exploration and development and production of oil and gas wells, in order to improve the production of oil and gas wells and the effect of oil field development, it is often necessary to perform fracturing on the reservoirs of oil and gas production wells. At present, when fracturing oil and gas wells on site, all layers of the whole well are generally fractured. Due to the different formation parameters and characteristics such as permeability and porosity of various reservoirs of oil and gas wells, this kind of general fracturing operation method cannot be treated differently. To achieve the ideal fracturing effect. Invention content: [0003] The purpose of the present invention is to provide an oil an...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B17/00
Inventor 姜涛李志龙王成方旭东
Owner CNPC GREATWALL DRILLING ENG
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