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Method and system for simulating pore space fluid distribution of core

A technology for simulating the distribution of cores and fluids, which is applied in the field of petroleum logging and can solve the problems of inability to quantitatively study the microscopic parameters of the reservoir.

Inactive Publication Date: 2014-03-05
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

However, petrophysical experiments cannot quantitatively study the influence of reservoir microscopic parameters on rock macroscopic physical properties, and a research method for reservoir microscopic parameters is urgently needed

Method used

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  • Method and system for simulating pore space fluid distribution of core
  • Method and system for simulating pore space fluid distribution of core
  • Method and system for simulating pore space fluid distribution of core

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Embodiment Construction

[0023] 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.

[0024] In the embodiment of the present invention, modeling needs to be performed based on natural core samples. Modeling requires the use of computer to reconstruct the 3D digital core of natural core samples, including the skeleton of the rock, the geometric shape, size, distribution, and interconnection of pores and throats, such as figure 1 As shown, simulate a digital rock core of a specific size (for example: 200*200*200), and set an integer number of grid units of rock skeletons around the simulation area (such as figure 1 The white area in ), the interior of the rock skeleton is a pore structure (such as figure 1 the black area in ), such as figure 2 Shown is the equivalent schematic diagram of the initial fluid distrib...

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Abstract

The embodiment of the invention discloses a method and a system for simulating the pore space fluid distribution of a core. The method comprises the following steps: establishing a digital core simulation area through a natural core sample, wherein a first area and a second area are formed in the digital core simulation area, the first area is a rock matrix, and the second area is a pore space; setting initial distribution of fluid in the second area and initial evolution conditions of an evolution equation of a lattice Boltzmann method of a Shan-Chen model according to the water saturation and the fluid type of the natural core sample, performing evolution calculation on the fluid distribution condition in the second area based on the evolution equation of the lattice Boltzmann method of the Shan-Chen model according to the initial evolution conditions and the initial distribution of the fluid in the second area, and acquiring the fluid distribution condition in the second area when the evolution calculation is stabilized. According to the method, the simulation accuracy of the fluid distribution condition is improved, and quantitative research of physical attributes of rocks is promoted.

Description

technical field [0001] The invention relates to the technical field of petroleum logging, in particular to a method and system for simulating fluid distribution in core pore space. Background technique [0002] Due to the increasing demand for oil and gas resources, the exploration and development of oil and gas fields have gradually shifted from conventional reservoirs to unconventional reservoirs, such as shale, tight sandstone, carbonate rock, oil sand, etc. Rock physics research is becoming more and more important in the evaluation of oil and gas reservoirs. For the above complex reservoirs, rock physics research has encountered many difficulties, such as: low porosity and low permeability rocks are difficult to displace, and fractures are well developed. It is difficult to obtain representative cores for carbonate rocks, and it is difficult to carry out petrophysical experiments for shale and oil sands. However, petrophysical experiments cannot quantitatively study the...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 姜黎明杜环虹章海宁屈乐朱益华
Owner BC P INC CHINA NAT PETROLEUM CORP
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