Check patentability & draft patents in minutes with Patsnap Eureka AI!

Evaluation method for multi-stage fracture shape of horizontal well staged fracturing

A fracture shape, staged fracturing technology, applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., can solve the important factors of fracture spacing and cluster spacing production, recovery factor and economic benefit are not clear , Stress shadow effect representation and calculation are not clear, etc., to achieve the effect of increasing the volume

Inactive Publication Date: 2018-12-07
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the fracturing design of horizontal wells, fracture spacing and cluster spacing, which are important factors affecting production, recovery and economic benefits, are still unclear. The core lies in the characterization and calculation of the stress shadow effect produced by hydraulic fractures. clear

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
  • Evaluation method for multi-stage fracture shape of horizontal well staged fracturing
  • Evaluation method for multi-stage fracture shape of horizontal well staged fracturing
  • Evaluation method for multi-stage fracture shape of horizontal well staged fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0031] The present invention first considers the heterogeneity of the shale formation, establishes a relevant mechanical model, calculates the boundaries of natural fracture opening and shear fracture respectively, and preliminarily evaluates the interference between hydraulic fractures and natural fractures according to the basic parameters of the target reservoir. direction of the crack. Secondly, using shale outcrop samples, a physical simulation experiment of multi-cluster horizontal well fracturing was carried out. By changing the cluster perforation spacing, dynamic microseismic monitoring data and fracturing curves are used, combined with the results obtained in the first step, to evaluate the influence of stress shadows and provide a basis for optimal fracturing design of shale gas horizontal wells.

[0032] Specifically, the present invention includes two pa...

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 an evaluation method for a multi-stage fracture shape of horizontal well staged fracturing, and belongs to the field of oil and gas stimulation. The evaluation method for the multi-stage fracture shape of horizontal well staged fracturing includes the steps that (1) a natural fracture opening mechanical model and a shear fracturing mechanical model of shale are established,a natural fracture opening boundary and a shear fracturing boundary are calculated, and according to basic parameters of a target reservoir, the trend of a fracture after the hydraulic fracture and natural fracture interference is preliminarily evaluated; and (2) an outcrop rock sample of the shale is adopted, and a fracturing physical simulation experiment of multi-cluster horizontal wells is carried out by changing the spacing of cluster perforations to obtain the optimal cluster perforation spacing.

Description

technical field [0001] The invention belongs to the field of oil and gas production stimulation, and in particular relates to a method for evaluating multi-stage fracture morphology in staged fracturing of a horizontal well. Background technique [0002] In recent years, the progress and large-scale application of horizontal well and volume fracturing technology in unconventional fields at home and abroad have enabled the efficient and economical development of unconventional oil and gas resources and played a revolutionary role. However, in the fracturing design of horizontal wells, fracture spacing and cluster spacing, which are important factors affecting production, recovery and economic benefits, are still unclear. The core lies in the characterization and calculation of the stress shadow effect produced by hydraulic fractures. clear. Most of the previous studies focused on the interaction between two parallel fractures under static conditions. For shale with natural f...

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
IPC IPC(8): E21B49/00E21B43/26
CPCE21B43/26E21B49/00
Inventor 周健蒋廷学陈作张保平张旭东姚奕明徐胜强吴峙颖
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com