Hydraulic sand jet perforation, fracture and sand filling integrated technological method

A process method and hydraulic jetting technology, which are applied in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems of reduced construction efficiency, easy damage of packers, and inability to meet construction techniques, and improve the transformation effect. Effect

Active Publication Date: 2014-12-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the conditions of large displacement construction, the packer is easily damaged, which cannot meet the needs of construction technology and reduce construction efficiency

Method used

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  • Hydraulic sand jet perforation, fracture and sand filling integrated technological method
  • Hydraulic sand jet perforation, fracture and sand filling integrated technological method
  • Hydraulic sand jet perforation, fracture and sand filling integrated technological method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: The oil well is 3500m deep, with upper and lower oil layers, the inner diameter of the casing is 124.3mm, and the outer diameter of the tubing is 73.03mm;

[0021] This method uses hydraulic sand blasting perforation and fracturing process pipe string operations, and the pipe string is connected to the safety joint 2, the hydraulic injector 3, the check valve 4 and the inclined tip 5 sequentially through the oil pipe 1 from top to bottom, and the terminal of the inclined tip 5 is 30 ° beveled slope, the water jet 3 is provided with eight symmetrically arranged nozzles, the nozzle aperture is 6 mm, and its process steps are as follows:

[0022] A. Run in hydraulic sand blasting perforation and fracturing process string: run in this process string so that the hydraulic injector 3 reaches the lower layer II position where perforation is required;

[0023] B. Positive washing: before perforating, wash the well with well-washing fluid. The displacement of the well...

Embodiment 2

[0029] Example 2: The oil well is 3500m deep, with upper and lower oil layers, the inner diameter of the casing is 124.3mm, and the outer diameter of the tubing is 73.03mm;

[0030] This method uses hydraulic sand blasting perforation and fracturing process pipe string operations, and the pipe string is connected to the safety joint 2, the hydraulic injector 3, the check valve 4 and the inclined tip 5 sequentially through the oil pipe 1 from top to bottom, and the terminal of the inclined tip 5 is Bevel with 40° bevel. The water power injector 3 has eight symmetrically arranged nozzles with a diameter of 6 mm. The process steps are as follows:

[0031] A. Run in hydraulic sand blasting perforation and fracturing process string: run in this process string so that the hydraulic injector 3 reaches the lower layer II position where perforation is required;

[0032] B. Positive washing: before perforating, wash the well with well-washing fluid. The displacement of the well-washing...

Embodiment 3

[0038] Example 3: The oil well is 3500m deep, with upper and lower oil layers, the inner diameter of the casing is 124.3mm, and the outer diameter of the coiled tubing is 1.75inmm;

[0039] This method uses hydraulic sand blasting perforation and fracturing process pipe string operations, and the pipe string is connected to the safety joint 2, the hydraulic injector 3, the check valve 4 and the inclined tip 5 sequentially through the oil pipe 1 from top to bottom, and the terminal of the inclined tip 5 is 40° oblique angle, the water jet 3 has three uniformly arranged nozzles, the nozzle aperture is 6mm, and the process steps are as follows:

[0040] A. Run in hydraulic sand blasting perforation and fracturing process string: run in this process string so that the hydraulic injector 3 reaches the lower layer II position where perforation is required;

[0041] B. Positive washing: before perforating, wash the well with well-washing fluid. The displacement of the well-washing we...

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PUM

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Abstract

The invention discloses a hydraulic sand jet perforation, fracture and sand filling integrated technological method which is designed for meeting the requirement for hydraulic sand jet perforation and fracture integrated work and ensuring the construction capacity of a pipe column under the large discharge capacity condition. The method of fracturing the lower layer through hydraulic jet, filling the lower layer with sand, sealing the lower layer and then conducting upper layer section hydraulic jet fracture construction is adopted, and therefore it is ensured that the lower layer is effectively refitted, a pipe column packer is prevented from being damaged, dragging and fracture of multiple sections of a horizontal well of an oil field can be executed, large-discharge-volume fracture refitting, with the high anisotropism, the large physical difference and the dense oil deposit, between reservoirs can be achieved, the refitting effect of the horizontal well with the dense oil deposit is improved, and the aim of increasing the yield is achieved. By means of a hydraulic safe connector on the technological pipe column, the pipe column above the connector can be conveniently jacked up when the pipe column is stuck.

Description

technical field [0001] The invention relates to a hydraulic sand blasting perforation fracturing and sand filling combined process method, which belongs to the technical field of oil and gas well fracturing reconstruction. Background technique [0002] The current hydraulic sand blasting perforation and fracturing integrated process string can realize the integrated transformation of perforation and fracturing in one pass, which can greatly shorten the operation period and simplify the construction procedure. For oil and gas wells with multiple reservoirs in one well and good homogeneity or little difference in physical properties between layers, the string can realize self-sealing and perform accurate fracturing stimulation on each layer. However, when the heterogeneity and differences among the various reservoirs of the construction well are strong, the pipe string may cause the fracturing fluid that should have entered the upper layer to "leak" into the lower layer, so th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B43/14E21B21/00
Inventor 冯飞付钢旦桂捷赵粉霞任勇王在强何华邵媛刘明
Owner PETROCHINA CO LTD
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