Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Determining method for surveying reserves of hypotonic clastic rock oil-gas reservoir

A technology for clastic rock and reserves, applied in the field of geophysical exploration and well logging, can solve the problems of large reserves error, oil (gas) area can not objectively reflect the actual situation, lack of exploration well control, etc., to save workload, reduce costs, The effect of improving economic efficiency

Active Publication Date: 2011-01-05
PETROCHINA CO LTD
View PDF0 Cites 76 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the oil and gas reserve calculation specification, it is predicted that the main sand belt of low-permeability clastic rocks can extend to the place where there is no control of exploration wells, and the oil (gas) area is still determined by artificially specified well point extrapolation method. The main purpose of this artificially specified It is to ensure the accuracy of calculated reserves, but the disadvantage of this method is that the determined oil (gas) area cannot objectively reflect the actual situation, and the calculated reserves sometimes have relatively large errors

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
  • Determining method for surveying reserves of hypotonic clastic rock oil-gas reservoir
  • Determining method for surveying reserves of hypotonic clastic rock oil-gas reservoir
  • Determining method for surveying reserves of hypotonic clastic rock oil-gas reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0069] Below in conjunction with example the present invention will be further described:

[0070] The specific implementation process of the calculation method for low-permeability clastic rock oil (gas) reservoir reserves:

[0071] The first step is to use known methods to determine the formation, sedimentary facies, reservoir characteristics and oil and gas accumulation rules of the reserve calculation area. It is to study the regional petroleum geological characteristics of the reservoir, mainly the sedimentary background, reservoir characteristics and controlling factors of oil (gas) accumulation;

[0072] The second step is to draw a sandstone thickness contour map according to the drilling and logging data in the reserve calculation area, combined with the seismic sand layer prediction data and the characteristics and laws determined in step 1, using known methods;

[0073] The third step is to carry out statistical regression analysis on the daily oil and gas producti...

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 relates to a determining method for surveying the reserves of hypotonic clastic rock oil-gas reservoir positioned on a clastic rock oil (gas) geological reservoir enrichment boundary, comprising the following steps of: carrying out statistical regression on the daily produced oil-gas data and water data of the traditional testing oil well and the traditional testing gas well and thecorresponding physical data, oil-bearing data and electrical data of an oil layer to determine the physical lower limit value, the oil-bearing lower limit value and the electrical lower limit value of an oil-gas layer, which correspond to industrial oil-gas flows; determining the minimum values of output and a sand body thickness according to the relationship between an effective thickness and test oil output and between the sand body thickness and test production; determining the area boundary of the oil-gas reservoir by using a sandrock thickness isoline method and an effective thickness isoline method; and calculating the reserves of the hypotonic clastic rock oil-gas reservoir. The invention solves the problem that the oil-bearing area of the traditional hypotonic clastic rock oil (gas) reservoir is extrapolated depending on artificial well points, is convenient to apply in the calculation of the reserves, can not only be used for more accurately calculating the reserves of oil (gas) reservoir, but also furthest save the exploration discovery workload and reduce the discovery cost of ton reserves, thereby enhancing the economic benefits of oil-gas exploration and development.

Description

technical field [0001] The invention relates to geophysical prospecting and logging technology, and is a method for determining the reserves of low-permeability clastic rock oil and gas reservoirs for investigating the enrichment boundary of clastic rock oil (gas) geological reservoirs. Background technique [0002] There are many methods for calculating oil and gas reserves. Among them, it is very difficult to determine the boundaries of oil (gas) areas. No matter in terms of theoretical understanding or from the perspective of production practice, it is necessary to establish a reasonable low-permeability fracture Calculation methods for clastic oil (gas) reservoir reserves are very necessary. [0003] At present, the calculation of low-permeability clastic rock oil (gas) reservoir reserves is carried out according to the enterprise standard "Calculation Specifications for Oil and Gas Reserves". Among them, the oil (gas) area boundary is determined by the well point extra...

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): G01V9/00
Inventor 付金华王宏娥姜英昆帅世敏张发旗杨昀周虎刘新社张忠义
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products