Tight sandstone reservoir rock elasticity modulus calculation method

A technology of elastic modulus and rock, applied in the field of rock elastic modulus calculation of tight sandstone reservoirs, can solve the problems of tight sandstone reservoirs such as small porosity and permeability, unbalanced rock pore fluid pressure, and low accuracy

Active Publication Date: 2015-02-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0003] The main difference between tight reservoirs and conventional reservoirs is that the porosity and permeability of tight sandstone reservoirs are smaller. When seismic waves pass through tight sandstone reservoirs, the pressure of rock pore fluids is unbalanced. Therefore, the Gassmann equation has low accuracy in petrophysical analysis of tight sandstone reservoirs

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  • Tight sandstone reservoir rock elasticity modulus calculation method
  • Tight sandstone reservoir rock elasticity modulus calculation method
  • Tight sandstone reservoir rock elasticity modulus calculation method

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[0053] Aiming at the problem in the prior art that users cannot accurately judge the time for dust removal and cooling, the present application discloses a remote spray device control system.

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] see figure 1 A schematic flow chart showing an embodiment of a method for calculating the rock elastic modulus of a tight sandstone reservoir according to the present invention.

[0056] Such as figure 1 It can be seen that the method includes:

[0057] A: Obtai...

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Abstract

The invention discloses a tight sandstone reservoir rock elasticity modulus calculation method. The method includes analyzing characteristics of a conventional sandstone reservoir and tight sandstone reservoir respectively according to rock physical parameters; researching the main characteristics of low porosity, low pore connectivity and high irreducible water saturation of the tight sandstone; analyzing pore shapes and pore distribution features of the rocks on the basis of a rock physical model sensitive to the inclusion shape; considering the simultaneous existence of the fluid even mixing and patchy saturation distribution, combining with an attenuation model to analyze the problem that earth physical data produced in manners of low permeability and high viscosity are match mutually in different frequency bands, and applying a rock physical module established according to the tight sandstone reservoir to reservoir rock speed estimation.

Description

technical field [0001] The present application relates to the field of well logging, and more specifically, relates to a method for calculating the rock elastic modulus of tight sandstone reservoirs. Background technique [0002] With the deepening of geophysical exploration research, the underground conditions we face become increasingly complex. Seismic exploration research for unconventional reservoirs can improve the success rate of exploration to a certain extent, improve production efficiency and reduce the cost of exploration and development. [0003] The main difference between tight reservoirs and conventional reservoirs is that the porosity and permeability of tight sandstone reservoirs are smaller. When seismic waves pass through tight sandstone reservoirs, the pressure of rock pore fluids is unbalanced. Therefore, the The Gassmann equation has low precision in petrophysical analysis of tight sandstone reservoirs. Contents of the invention [0004] In view of t...

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Application Information

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IPC IPC(8): G01V1/30
Inventor 宗兆云印兴耀吴国忱李龙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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