Method and device for analyzing oil-string casing failure

A technology of oil layer and casing, which is applied in the field of analysis of failure of oil layer casing, can solve the problems of poor accuracy, wrong analysis results, large differences, etc., and achieve the effect of improving accuracy

Active Publication Date: 2016-07-13
PETROCHINA CO LTD
View PDF1 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the oil layer casing failure caused by volume fracturing, the influence of the huge and uneven stimulation volume produced by volume fracturing technology and the complex formation fracture network on the in-situ stress and rock deformation and sliding in heterogeneous formations is very complicated , the position where the oil layer casing may be deformed is quite different from the position where the oil layer casing may be deformed under other fracturing technologies. If the above-mentioned oil layer casing failure analysis method is used, the wrong analysis results will often be obtained, thus making The accuracy of the analysis of oil and gas well reservoir casing failure is poor

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 and device for analyzing oil-string casing failure
  • Method and device for analyzing oil-string casing failure
  • Method and device for analyzing oil-string casing failure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The embodiment of the present invention provides a method for analyzing the failure of oil layer casing, such as figure 1 As shown, the processing flow of the method may include the following steps:

[0040] Step 101, obtaining the geological parameters and engineering parameters of strata at different depths within the preset range where the target oil and gas well is located, wherein the geological parameters include stratum inclination angle, stratum lithology profile, stratum rock mechanics parameter profile, stratum in-situ Stress profile and fault information within the preset range where the target oil and gas well is located. Engineering parameters include the well trajectory of the target oil and gas well, cementing quality information, perforation position information, fracturing construction parameters, and casing damage position information.

[0041] Step 102, according to the geological parameters and engineering parameters, determine the information of the...

Embodiment 2

[0045] An embodiment of the present invention provides a method for analyzing casing failure in an oil layer, and the execution subject of the method is a terminal. Wherein, the terminal may be any terminal, such as a notebook computer.

[0046] The following will combine specific implementation methods, figure 1 The processing flow shown is described in detail, and the content can be as follows:

[0047] Step 101, obtaining the geological parameters and engineering parameters of strata at different depths within the preset range where the target oil and gas well is located, wherein the geological parameters include stratum inclination angle, stratum lithology profile, stratum rock mechanics parameter profile, stratum in-situ Stress profile and fault information within the preset range where the target oil and gas well is located. Engineering parameters include the well trajectory of the target oil and gas well, cementing quality information, perforation position information,...

Embodiment 3

[0074] Based on the same technical idea, the embodiment of the present invention also provides a device for analyzing the failure of the casing in the oil layer, such as figure 2 As shown, the device includes:

[0075] The obtaining module 210 is used to obtain geological parameters and engineering parameters of strata at different depths within the preset range where the target oil and gas well is located, wherein the geological parameters include stratum inclination angle, stratum lithology profile, stratum rock mechanics parameter profile, stratum The in-situ stress profile of the target oil and gas well and the fault information within the preset range of the location of the target oil and gas well. Engineering parameters include the well trajectory of the target oil and gas well, cementing quality information, perforation position information, fracturing construction parameters, casing damage location information;

[0076] The first determination module 220 is used to d...

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 embodiment of the invention discloses a method and device for analyzing oil-string casing failure and belongs to the technical field of well completion engineering safety of unconventional oil and gas resource exploitation.The method comprises the steps that geological parameters and engineering parameters of stratums of different depths within a preset range at the position where a target oil and gas well is located are obtained, information of a high-risk area of an oil-string casing of the oil and gas well is determined according to the geological parameters and the engineering parameters, dynamic crustal-stress change and rock stratum deformation situation in the fracturing process of the stratum where the high-risk area of the oil-string casing is located are obtained according to the geological parameters, the engineering parameters and the information of the high-risk area of the oil-string casing of the oil and gas well, and the deformation occurrence of the oil-string casing is determined based on the obtained dynamic crustal-stress change and the obtained rock stratum deformation situation.By the adoption of the method and the device for analyzing the oil-string casing failure, the accuracy of analysis conducted on the oil-string casing failure under large-scale segmented volume fracturing conditions can be improved.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas resource development and completion engineering safety technology, in particular to a method and device for analyzing the failure of an oil layer casing. Background technique [0002] In the process of developing unconventional oil and gas resources, in order to increase the industrial production capacity of oil and natural gas, fracturing technology is usually used to improve the permeability of the reservoir. broadly used. [0003] With the application of volume fracturing technology, after volume fracturing of reservoirs, a large number of oil and gas well casings fail, which has a huge impact on the extraction efficiency of oil and natural gas. A commonly used method for failure analysis of oil layer casing is to measure the geological parameters of formations at different depths within the preset range where oil and gas wells are located, such as the inclination angle betw...

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): G06F17/50E21B17/00
Inventor 佘朝毅周浪张华礼刘祥康马勇李玉飞卢亚锋李晓蔓曹权钟海峰
Owner PETROCHINA CO LTD
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