Shale gas pool construction and production favorable area comprehensive determining method
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A discriminating method and technology of favorable areas, applied in the field of mineral exploitation, can solve problems such as insufficient reflection of shale gas reserves
Active Publication Date: 2014-12-10
CHINA UNIV OF PETROLEUM (BEIJING) +1
View PDF4 Cites 33 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Because there are many factors affecting shale gas reservoirs, the existing discrimina...
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0041] Example 1 Correlation Analysis of Test Gas Output, Gas Content and Each Index
[0042] The work area is located in the Changning-Weiyuan Shale Gas National Demonstration Area in the south of the Sichuan Basin. The horizon is the Longmaxi Formation rich in organic matter shale. The shale gas content is the sum of the free gas content and the adsorbed gas content, wherein the free gas content is obtained by an experimental method; the adsorbed gas content is measured by an on-site desorption method.
[0043] In this example, a correlation analysis is carried out between the test gas output and seven other indicators: total organic carbon content, organic matter maturity, shale gas content, fracturing index Fi, formation pressure coefficient α, burial depth and shale thickness, and extract The combination of total organic carbon content (TOC), fracturing index, formation coefficient and shale thickness is obtained.
[0044] Depend on Figure 1 ~ Figure 4 It can be seen t...
Embodiment 2
[0050] The work area is located in the Changning-Weiyuan Shale Gas National Demonstration Area in the south of the Sichuan Basin. The layer is the Longmaxi Formation rich in organic matter shale, and its cumulative development area totals 7,936.7 square kilometers. As of July 2013, there are 26 wells in the study area, including 6 wells in Changning block and 20 wells in Weiyuan block.
[0051] For technical routes and steps, see Figure 5 with Image 6 . The specific process is:
[0052] 1) Collect the index data required for the identification of favorable areas for production construction in the work area, the index data are total organic carbon content (TOC), organic matter maturity (Ro), shale gas content, shale thickness (H), Formation pressure coefficient, Young's modulus, Poisson's ratio, and burial depth. The above indicators are measured by conventional technical means.
[0053] 2) Combining the three indicators of total organic carbon content (TOC), organic mat...
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
Login to view more
Abstract
The invention provides a shale gas pool construction and production favorable area comprehensive determining method. The method includes the steps of 1) collecting indicator data required for construction and production favorable area determining in a work area; 2) drawing a hydrocarbon generation favorable area plan of the work area through the combination with three indicators of the total content of organic carbon, the organic matter maturity and the content of shale gas; 3) combining Young's modulus with Poisson's ratio for calculating a fracturing index Fi and screening out a favorable geological development area through the combination with three indicators of the fracturing index, the formation pressure coefficient and the burial depth; 4) defining the product of the total content of organic carbon, the fracturing index, the formation coefficient and the thickness of quality shale as a gas testing indicator, screening out development effects of reservoir in the work area with the gas testing indicator and drawing a gas testing favorable area plan of the work area; 5) finally obtaining a construction and production favorable area plan of the work area. According to the shale gas pool construction and production favorable area comprehensive determining method, the favorable hydrocarbon generation and development area can be finally and comprehensively determined by screening out important indicators required for the selection of a preferred shale gas construction and production core area.
Description
technical field [0001] The invention belongs to the field of mineral mining, and in particular relates to a method for comprehensively identifying shale minerals. Background technique [0002] As a kind of unconventional gas reservoir, shale gas reservoir has the typical characteristics of unconventional gas reservoirs, in which parameters such as gas content, TOC, maturity, fracture, porosity, permeability, depth, thickness, mineral composition, etc. vary greatly . China's shale gas exploration is still in its initial stage, and the evaluation indicators for selected areas currently mainly include: organic geochemical parameters, reservoir thickness and burial depth, reservoir space and physical properties, rock mineral composition and mechanical properties, adsorption characteristics and gas accumulation mechanism, Reservoir fluid temperature and pressure characteristics and current regional stress field, etc. In the prior art, the judgment of favorable areas for shale g...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more