Perforation, fracturing integrated method and its technique pipe

A process pipe string and fracturing technology, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of complex operation procedures, high development cost, long cycle, etc., and achieve simple supporting tools and convenient construction. Simple, short cycle effect

Inactive Publication Date: 2007-10-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for the multi-layered fracturing of a well, it is necessary to trip the perforating hydraulic injector and hydraulic fracturing downhole tools many times, the operation procedure is complicated, the cycle is long, and the economy is poor. Oil and gas layers, especially for low pressure, low production, low permeability oil and gas wells, will cause great harm
With the deepening of oil and gas field development, its development is becoming more and more difficult, and the development cost is getting higher and higher. It is sometimes difficult to achieve ideal stimulation effects and economic benefits by adopting conventional fracturing and acidizing production stimulation measures

Method used

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  • Perforation, fracturing integrated method and its technique pipe
  • Perforation, fracturing integrated method and its technique pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A. Lower the entrance hole and the integrated process string of fracturing, and lower the hydraulic ejector 4 to the position where the perforation is required;

[0019] B. Positive washing: Wash the well with well washing fluid before perforating, with a displacement of 1000l / min, until the water quality of the inlet and outlet is consistent;

[0020] C. Hydraulic jet perforation: Inject the perforating fluid from the tubing (the fracturing fluid carries the sand with the original rubber, the proppant is 40 mesh quartz sand, and the sand concentration is 120kg / m 3 ), when the sand-carrying liquid is 250m away from the nozzle, the displacement is increased and the perforation is sprayed. When perforating, the perforating liquid is injected from the tubing and returned from the oil and the collar;

[0021] D. Hydraulic jet fracturing: After the hydraulic jet perforation is completed, the fracturing fluid is injected from the tubing. At the same time, the oil jacket annulus i...

Embodiment 2

[0023] A. Lower the entrance hole and the integrated process string of fracturing, and lower the hydraulic ejector 4 to the position where the perforation is required;

[0024] B. Positive washing: Wash the well with well washing fluid before perforating, and the washing and discharging volume is 500l / min, until the water quality of the inlet and outlet is consistent;

[0025] C. Hydraulic jet perforation: inject the perforating fluid from the tubing (the fracturing fluid carries the sand with the original rubber, the proppant is 60 mesh quartz sand, and the sand concentration is 120kg / m 3 ), when the sand-carrying liquid is 200m away from the nozzle, the displacement is increased and the perforation is sprayed. When perforating, the perforating liquid is injected from the tubing and returned from the oil and the collar;

[0026] D. Hydraulic jet fracturing: After the hydraulic jet perforation is completed, the fracturing fluid is injected from the tubing. At the same time, the oi...

Embodiment 3

[0028] A. Lower the entrance hole and the integrated process string of fracturing, and lower the hydraulic ejector 4 to the position where the perforation is required;

[0029] B. Positive washing: Wash the well with well washing fluid before perforating, with a displacement of 210l4min, until the inlet and outlet water quality is consistent;

[0030] C. Hydraulic jet perforation: Inject the perforating fluid from the tubing (the fracturing fluid carries sand with the original rubber, the proppant is 47 mesh quartz sand, and the sand concentration is 120kg / m 3 ), when the sand-carrying liquid is 230m away from the nozzle, the displacement is increased and the perforation is sprayed. When perforating, the perforating liquid is injected from the tubing and returned from the oil and the collar;

[0031] D. Hydraulic jet fracturing: After the hydraulic jet perforation is completed, the fracturing fluid is injected from the tubing. At the same time, the oil jacket annulus is injected w...

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Abstract

An integral method of perforating hole and fracturing in oil industry and its process pipe column. The first step: aiming the hydraulic ejector 4 at the oil and gas well designed perforating hole section and processing hydraulic projecting, forming a (or more) projecting pore path on the oil and gas layer; the second step: after the pore path is formed, projecting the fracturing fluid into pore path from ejector nipple through oil pipe in very high speed, while projecting certain fluid into the annular according design to improve the well bore pressure, so the ground layer generates cracks and the cracks start extending towards deeper layer. The process pipe column includes hydraulic ejector (4), single-flow valve (5), screen pipe (6) and so on, the oil pipe (1), universal joint (2), eccentric locator (3), hydraulic ejector (4), single-flow valve (5), screen pipe (6) and blind head (7) are connected sequentially, it applies to the multistage layered pressing crack of barefoot horizontal well and composes the perforating hole and fracturing into one unit; it has longer penetrating depth and bigger perforating hole aperture than ordinary polyenergy perforating and avoids the injury of reservoir caused by ordinary perforating.

Description

Technical field [0001] The invention discloses a perforation and fracturing integrated method and its process string used in the petroleum industry, which is suitable for single-layer or layered fracturing reforms of oil and gas wells with multiple completion modes, and concentrated injection The new production-increasing measure technology integrating pore, fracturing and packing, the supporting tools are simple, the construction is convenient and simple, and the period is short. Background technique [0002] The traditional hydraulic jet perforating and hydraulic fracturing are separate. The hydraulic jet specially designed for perforating is used for perforating, the perforating hydraulic jet is raised, and then hydraulic fracturing downhole tools are inserted to implement oil and gas well fracturing. Transformation. Especially for the multi-layer stratified fracturing reformation of a well, it requires multiple trips and downs of the perforating hydraulic ejector and hydrauli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B43/11E21B43/26
Inventor 付钢旦赵粉霞鄢长灏桂捷张华光任勇
Owner PETROCHINA CO LTD
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