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Radial hydraulic jetting drilling technology

A hydraulic jetting and technical technology, applied in the field of perforation, can solve the problems of limited formation conditions, high drilling cost of horizontal wells, and difficulty in selecting wells and layers, and achieves the effects of low cost and short time.

Inactive Publication Date: 2012-01-11
ZHAODONG HUAYING OILFIELD DRILLING TECH SERVICE
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AI Technical Summary

Problems solved by technology

[0002] The maximum penetration depth of perforation currently used in oilfields is about one meter, and radial hydraulic drilling technology can fundamentally change the lack of perforation penetration, but the hydraulic fracturing measures in it are within the interval where the packer is stuck , the pressure-opening position and fracture direction cannot be controlled, hydraulic slotting and deep penetration perforation oil layer stimulation radius is small, and the stimulation effect is limited; the drilling cost of horizontal wells and sidetracking horizontal wells is high, and the application of formation conditions is limited
As the oilfield enters a period of ultra-high water cut, the underground situation becomes more and more complicated, and it becomes more and more difficult to select wells and layers by adopting various potential tapping measures, and the effect of increasing production and injection gradually becomes worse

Method used

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  • Radial hydraulic jetting drilling technology

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Embodiment Construction

[0021] The composition of the equipment used in the technology of the present invention is mainly divided into two parts, that is, ground equipment and downhole equipment, wherein the ground equipment mainly includes: ground high-pressure jet generation conduction device, ground computer monitoring data acquisition processor; downhole equipment mainly includes: whipstock , Underground window opening equipment and high-pressure water injection device.

[0022] Using the radial hydraulic jet drilling technology of the present invention, its specific construction process includes the following steps:

[0023] 1. Preparation before construction

[0024] 1. Before radial hydrojet construction, carefully analyze the operation wells to be implemented, and determine the feasibility and construction workload of hydrojet according to the actual situation of the oil well;

[0025] 2. The construction well site must have enough working space, and it is required to have the ability to pas...

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Abstract

The invention discloses a radial hydraulic jetting drilling technology, which solves the problems that in the existing radial jetting drilling technology, the cracking position and the crack direction can not be controlled, and a hydraulic cut slot and a deep penetration hole oil layer have small construction radii. In the technology, a cutting knife is used for cutting a window in the oil layer sleeve pipe position to be constructed, high-pressure fluid is generated through a ground high-pressure circulation generation device, small directional boreholes with the diameter being 40mm to 50mm and the length being 100m are jet in the required direction and depth through the rock breaking effect of high-pressure hydraulic jetting and pass through a pollution zone to be connected with bypassed oil regions, the aerial drainage radius is increased, and the permeation condition is improved, so the oil well yield is increased, and the oil layer recovery ratio is improved.

Description

technical field [0001] The invention relates to a perforating technology for oil and gas field development, well completion operations, and oil and gas reservoir stimulation for increasing production and injection, in particular to a radial hydraulic drilling technology. Background technique [0002] The maximum penetration depth of perforation currently used in oilfields is about one meter, and radial hydraulic drilling technology can fundamentally change the lack of perforation penetration, but the hydraulic fracturing measures in it are within the interval where the packer is stuck , the pressure-opening position and fracture direction cannot be controlled, hydraulic slotting and deep penetration perforation oil layer stimulation radius is small, and the stimulation effect is limited; the drilling cost of horizontal wells and sidetracking horizontal wells is high, and the application formation conditions are limited to a certain extent. As the oilfield enters a period of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18E21B7/04
Inventor 吴家毅邵天祥王伟
Owner ZHAODONG HUAYING OILFIELD DRILLING TECH SERVICE
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