A fracturing method and system based on ultimate flow-limiting design

A technology of ultimate and fracturing fluid, which is applied in the field of fracturing methods and systems based on ultimate current limiting design, and can solve the problems of inability to overcome the inhomogeneity of hydraulic fractures, affecting development efficiency, and inability to expose reservoirs well. Improve the efficiency of reservoir development and promote the effect of uniform stimulation

Active Publication Date: 2020-11-06
CHINA UNIV OF PETROLEUM (BEIJING) +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For horizontal wells that mainly develop a set of reservoirs, since logging can only obtain geomechanical parameters in the near-wellbore zone, the current perforation method cannot overcome the inhomogeneity in the development of hydraulic fractures in the process of vertical and lateral expansion; and Interference between fracture clusters, flow competition and the impact of blasthole erosion in each cluster will aggravate the uneven development of fracture clusters in the fracturing section, resulting in poor exposure of the reservoir and affecting development efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A fracturing method and system based on ultimate flow-limiting design
  • A fracturing method and system based on ultimate flow-limiting design
  • A fracturing method and system based on ultimate flow-limiting design

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present invention, rather than to limit the scope of the present invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0033] Those skilled in the art know that the embodiments of the present invention can be implemented as a system, device, device, method or computer program product. Therefore, the present disclosure may be embodied in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0034] The principle and spirit of the present invention will be explained in detail below...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a fracturing method and system based on limit current limiting design. The fracturing method based on limit current limiting design comprises the following steps of: updating the change of a stress field affected by crack propagation in a geological model according to logging data and core test data from the initial moment; calculating the perforating hole friction resistance, the crack interior friction resistance and the crack opening pressure, sequentially obtaining the crack lengths of perforating hole clusters according to the crack size corresponding to each moment, and marking the ending moment of fracturing; obtaining the standard deviation of the crack lengths of all perforating hole clusters at the end of fracturing by adjusting the number of the perforating hole clusters and the number of perforating holes in the fracturing section; and when the standard deviation reaches the standard threshold value, generating a reservoir stratum fracturing scheme according to the number of the perforating hole clusters in the corresponding fracturing section and the number of perforating holes of each perforating hole cluster. The fracturing method and system provided by the invention can obtain the optimized fracturing scheme by adjusting the number of the perforating hole clusters and the number of the perforating holes in the fracturing section, and promote the uniform transformation of multiple clusters of cracks in the fracturing section, expose the production layer to the greatest extent, and improve the development efficiency of a reservoir stratum.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploitation, in particular to a fracturing method and system based on an extreme flow-limiting design. Background technique [0002] At present, the current-limited fracturing method used in the field of oil and gas exploitation has been proposed for a long time. It can be aimed at vertical wells. According to the difference in opening pressure of multiple reservoirs, the fracturing fluid in the wellbore can be reduced by designing the perforation friction. It entered different reservoirs successively, and finally realized the uniform fracture creation of Duoke reservoir. [0003] For horizontal wells that mainly develop a set of reservoirs, since logging can only obtain geomechanical parameters in the near-wellbore zone, the current perforating method cannot overcome the inhomogeneity in the development of hydraulic fractures in the process of vertical and lateral expansion; an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B43/11E21B43/119E21B47/00
CPCE21B43/11E21B43/119E21B43/26E21B47/00
Inventor 梁天博周福建胡晓东李明辉李秀辉袁立山左洁刘雄飞姚二冬李奔
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products