Unconventional oil and gas reservoir horizontal well section three-dimensional rock mass mechanics modeling method and device

A technology of horizontal well section and mechanical model, applied in the fields of instrumentation, calculation, electrical and digital data processing, etc., can solve the problems of lack, complex pore structure, large differences in microscopic pore throat characteristics, etc., and achieve the effect of accurate acquisition.

A technology of horizontal well section and mechanical model, applied in the fields of instrumentation, calculation, electrical and digital data processing, etc., can solve the problems of lack, complex pore structure, large differences in microscopic pore throat characteristics, etc., and achieve the effect of accurate acquisition.

CN103258091AInactive Publication Date: 2013-08-21PEKING UNIV
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  • Unconventional oil and gas reservoir horizontal well section three-dimensional rock mass mechanics modeling method and device
  • Unconventional oil and gas reservoir horizontal well section three-dimensional rock mass mechanics modeling method and device
  • Unconventional oil and gas reservoir horizontal well section three-dimensional rock mass mechanics modeling method and device

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Embodiment Construction

[0053] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0054] In order to enable those skilled in the art to better understand the present invention, the basic concepts related to the present invention are introduced as follows:

[0055] Compared with the rock mass physical properties of general low-permeability oil layers, unconventional oil and gas reservoirs (this invention mainly takes tight sandstone oil and gas as an example) have tighter lithology and poorer physical properties, transitioning from argillaceous silt to silty mud It is dominated by sex lithology, mud-covered sand sequence, single sand body is fragmented, and fault blocks are developed, with higher shale content, high irreducible water content, insufficient oil-water differentiation, and unique rock mass physical p...

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Abstract

The invention provides an unconventional oil and gas reservoir horizontal well section three-dimensional rock mass mechanical modeling method and device. The method includes the steps of determining an unconventional oil and gas reservoir horizontal well section object region; obtaining three-dimensional earthquake prestack gathered data in the object region; conducting elastic parametric inversion by adopting the three-dimensional earthquake prestack gathered data and obtaining a three-dimensional space elastic parameter data body in the object region, wherein the three-dimensional space elastic parameter data body comprises a rock mass poisson ratio and Young modulus; calculating a rock mass brittleness index according to the rock mass poisson ratio and the Young modulus; establishing a rock mass mechanical parameter model based on three-dimensional grid nodes according to the three-dimensional space elastic parameter data body and the rock mass brittleness index. The unconventional oil and gas reservoir horizontal well section three-dimensional rock mass mechanical modeling method and device can simply, effectively and accurately obtain an unconventional oil and gas reservoir rock mass mechanical model.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir development, in particular to a method for establishing a three-dimensional rock mass mechanical model of a horizontal well section of an unconventional oil and gas reservoir, and a device for establishing a three-dimensional rock mass mechanical model for a horizontal well section of an unconventional oil and gas reservoir. Background technique [0002] Unconventional oil and gas reservoirs refer to oil and gas deposits whose characteristics, accumulation mechanism and exploitation technology are different from conventional oil and gas reservoirs. There are many types of unconventional oil and gas resources, generally including tight and ultra-tight sandstone oil and gas, shale oil and gas, super-heavy (thick) oil, bituminous sandstone, coalbed methane, water-soluble gas, natural gas hydrate, etc. Among them, tight oil and gas (including tight sandstone oil and gas and tight carbona...

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Application Information

Patent Timeline
21 Aug 2013
Publication
CN103258091A
IPC
G06F17/50
Inventors
师永民; 张玉广