Method for calculating productivity of staged fracturing horizontal well of non-uniform shale oil reservoir

A staged fracturing and productivity calculation technology, applied in earthwork drilling, wellbore/well components, design optimization/simulation, etc., can solve problems such as non-uniform permeability fields of reservoirs that cannot be considered

Active Publication Date: 2020-11-24
SOUTHWEST PETROLEUM UNIV
View PDF15 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention aims to provide a method for calculating the productivity of horizontal wells with staged fracturing in heterogeneous shale reservoirs, which solves the problem that the existing analytical calculation methods cannot consider the non-uniform permeability field of the reservoir, and is used to predict the non-uniform The production of staged fractured horizontal wells in the permeability field provides a favorable basis for the optimal design and post-fracture evaluation of staged fractured horizontal wells in shale reservoirs

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
  • Method for calculating productivity of staged fracturing horizontal well of non-uniform shale oil reservoir
  • Method for calculating productivity of staged fracturing horizontal well of non-uniform shale oil reservoir
  • Method for calculating productivity of staged fracturing horizontal well of non-uniform shale oil reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0082] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. Unless otherwise defined, the technical terms or scientific terms used in the disclosure of the present invention shall have the usual meanings understood by those skilled in the art to which the disclosure belongs. The disclosure of the present invention uses "comprises" or "comprises" and other similar words to mean that the elements or objects appearing before the words include the elements or objects listed after the words and their equivalents, without excluding other elements or objects.

[0083] The present invention provides a method for calculating the productivity of horizontal wells with staged fracturing in heterogeneous shale reservoirs, comprising the following steps: ...

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 non-uniform shale oil reservoir staged fracturing horizontal well productivity calculation method. The method comprises the following steps that S1, a shale reservoir is divided into a matrix transformation area and a hydraulic fracture area, and a double-area linear flow physical model is established; S2, establishing a non-uniform permeability field based on position change; S3, establishing seepage mathematical models of the matrix transformation area and the hydraulic fracture area; S4, introducing dimensionless quantity, and simplifying the seepage mathematical model by adopting Laplace transformation; S5, solving pressure solutions of the matrix transformation area and the hydraulic fracture area; and according to the relation between the oil well constant production pressure solution and the oil well constant pressure production solution under the Laplace space, the Stehfest numerical inversion method and dimensionless definition conversion are combined, and the non-uniform shale oil reservoir staged fracturing horizontal well yield is obtained. According to the method, the heterogeneity of the oil reservoir flowing area is considered, an analyticalsolution is given, the actual situation is better met, and engineering application is easier.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas reservoir development, in particular to a method for calculating the productivity of horizontal wells with staged fracturing in heterogeneous shale reservoirs. Background technique [0002] At present, my country's and even the world's oil and gas exploration and development are gradually moving towards unconventional oil and gas fields, and horizontal wells + multi-stage multi-cluster fracturing technology has become an important technical means for exploiting such oil and gas reservoirs. Due to the characteristics of low porosity and low permeability of shale reservoirs, operators need to use horizontal well staged multi-cluster fracturing technology to form fracture networks in shale reservoirs, create "artificial oil and gas reservoirs", and achieve the purpose of improving oil and gas flow capacity. [0003] Due to sedimentation and diagenesis, the shale reservoir itself ha...

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): E21B43/26E21B49/00G06F30/20
CPCE21B43/26E21B49/00G06F30/20
Inventor 任岚蒋豪赵金洲林然肖静雯
Owner SOUTHWEST PETROLEUM UNIV
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap