Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fracturing method

A fracturing and pressure technology, applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., can solve the problems of improving the applicability of volume fracturing, the development of natural fractures, and not involving the structural stress field

Inactive Publication Date: 2021-09-07
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the successful operation of volume fracturing has extremely strict requirements on reservoir conditions, such as strong brittleness, developed natural fractures, and small in-situ stress difference. Most reservoirs are difficult to meet the construction standards of volume fracturing.
However, the research in the prior art focuses on the improvement and optimization of the existing process technology itself to improve the effect of volume fracturing, but does not involve the structural stress field to improve the applicability of volume fracturing in different reservoir conditions.

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
  • Fracturing method
  • Fracturing method
  • Fracturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further described below in conjunction with accompanying drawing.

[0035] figure 1 A process flow diagram of the fracturing method according to the present invention is shown. The fracturing method is to provide a fracturing method for horizontal wells. Specifically, as in step 1 of S1, the perforation operation is first performed in the horizontal well section 1, so as to form the perforation 3 extending into the formation 2 in the horizontal well section 1, such as image 3 shown. As in step 2 of S2, then, formation improvement operations are performed to form a new stress field in the near-wellbore zone in formation 2 (such as Figure 2a , 2b and 4), and open the micro-crack 4 (such as Figure 5 shown). As in step 3 of S3, finally, on the basis of step 2, perform hydraulic fracturing operation, thereby forming the main fracture 5, as Figure 6 shown.

[0036] In this fracturing method, before the hydraulic fracturing operation, ...

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 provides a fracturing method for a horizontal well. The fracturing method comprises the steps that 1, perforation is conducted on a horizontal section of the horizontal well; 2, the stress gradient of a near wellbore zone is improved, and microfractures are formed in the stratum; and 3, hydraulic fracturing operation is carried out to generate main fractures, according to the fracturing method, before fracturing operation is carried out, the operation of improving the stratum is carried out firstly to form a new stress field and open micro fractures in the vicinity of a near wellbore zone, the reservoir which is not originally suitable for volume fracturing can also achieve the volume fracturing transformation effect, and good practicability and popularization value are achieved.

Description

technical field [0001] The invention relates to the field of oil and gas field development engineering, in particular to a fracturing method for horizontal wells. Background technique [0002] Volume fracturing refers to the continuous expansion of natural fractures and shear slip of brittle rocks in the process of hydraulic fracturing, forming a fracture network in which natural fractures and artificial fractures intersect, thereby increasing the volume of stimulation, increasing initial production and final recovery Rate. [0003] Volume fracturing technology is usually used in horizontal wells in order to obtain the effect of large-scale stimulation of the reservoir. For example, Zhu Weiyao (2018) applied for the patent "Tight oil horizontal well three-dimensional fracture network cluster network fracturing optimization method (CN201811146295.8)", which provides a fracture network optimization evaluation method based on seepage productivity, and then optimizes the fractu...

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 Applications(China)
IPC IPC(8): E21B43/26E21B43/11
CPCE21B43/26E21B43/11
Inventor 李小龙李凤霞王海波贺甲元周彤刘长印
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com