Branch horizontal well exploitation method based on Bessel function

A technology of Bessel function and mining method, which is applied in the field of shale gas mining operations, and can solve problems such as reducing the development life of gas wells and blocking shale gas flow channels

Inactive Publication Date: 2017-01-25
YANAN UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a branched horizontal well mining method based on Bessel function, which solves

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
  • Branch horizontal well exploitation method based on Bessel function
  • Branch horizontal well exploitation method based on Bessel function
  • Branch horizontal well exploitation method based on Bessel function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] A kind of branch horizontal well exploitation method based on Bessel function of the present invention, specifically comprises the following steps:

[0045] Step 1: Determine the absolute core permeability k of the target reservoir 0 and the viscosity μ of shale gas g , where the core absolute permeability k 0 Viscosity μ of shale gas is measured by an automatic core permeability tester g Obtained by curve fitting method;

[0046] Step 2: Establish the gas-water two-phase seepage formula under the influence of Bessel function:

[0047] q w = - k 0 k r w μ ...

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 branch horizontal well exploitation method based on the Bessel function. The method specifically includes the following steps that firstly, the theoretical value of the shale gas yield of a branch horizontal well is calculated; secondly, according to the theoretical value, the branch horizontal well goes into operation according to daily actual yield, a curve chart of the daily actual yield and time of the branch horizontal well is drawn, when trip points appear in the curve chart, the curve chart is adjusted till no trip points appear in the curve chart, and when cumulative water yield is equal to critical water yield, the branch horizontal well is scrapped. Adjustment is conducted after trip points are generated, shale gas can conveniently carry produced water in a horizontal well shaft, damage caused when gas and water mixtures go back to the well bottom is reduced, and accumulation of the produced water at the well bottom is reduced, so that maintenance expenses are reduced, efficiency is high, and maintenance cost is saved.

Description

technical field [0001] The invention belongs to the technical field of shale gas exploitation operations, and relates to a branched horizontal well exploitation method based on Bessel functions. Background technique [0002] In shale gas development, drilling branch wells on the basis of horizontal wells can increase the length of the target layer, increase the oil drainage area, and increase oil and gas production. The technology is developing rapidly and has entered the stage of large-scale application. At present, branched horizontal well technology is an effective means of exploiting shale gas reservoirs. In the exploitation of shale gas wells, in order to obtain the maximum cumulative production, generally, one method is to control the pressure at the bottom of the horizontal well of the gas well, and the other method is to control the wellhead flow rate of the gas well to be constant. [0003] However, the existing shale gas branched horizontal well production method...

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): G06F17/50G06Q50/06E21B43/00
CPCE21B43/00G06F30/367G06F2119/06G06Q50/06
Inventor 李忠厚
Owner YANAN 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