A Simulation Method of Relative Permeability of Oil-Water Two-Phase
A technology of relative permeability and simulation method, applied in the field of oil production, can solve the problems such as difficulty in carrying out steady-state and non-steady-state phase permeability experiments for rock samples, and unreliable oil-water two-phase permeability curves in measurement errors.
Active Publication Date: 2020-12-01
PETROCHINA CO LTD
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Problems solved by technology
As the analysis objects faced by reservoir physics become more and more complex, such as low-permeability reservoirs and shale, etc., the experimental analysis methods have exposed the following deficiencies: the experimental period is long or it is difficult to carry out steady-state and unsteady-state facies for certain rock samples. At the same time, the measurement error caused by the long test period will also lead to unreliable oil-water two-phase permeability curves.
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[0101] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.
[0102] The embodiment of the present application provides a method for simulating the relative permeability of oil-water two-phase, the method comprising the following steps:
[0103] Step S101: Carry out a constant-speed mercury injection experiment on the rock sample to be analyzed to obtain the pore throat data of the rock sample ( Figure 1-3 Shown is the pore radius and throat radius distribution data obtained by constant-speed mercury injection of a medium-high permeability core), and the pore-throat data include the frequency distribution data of pore radius and the frequency distribution data of throat radius.
[0104] Step S102: Construct a pore network based on t...
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The invention provides a simulation method of the oil-water two-phase relative permeability. The simulation method comprises the following steps of acquiring pore throat data of a rock sample, whereinthe pore throat data includes pore radius frequency distribution data and throat radius frequency distribution data; based on the pore throat data, constructing a pore network; establishing an oil-water two-phase fluid flowing simulation criterion in the pore network; and according to the two-phase fluid flowing simulation criterion, implementing two-phase fluid flowing simulation in the pore network to acquire pore network water-phase relative permeability data and pore network oil-phase relative permeability data under different pore network water saturations. In the technical scheme provided by the invention, according to the pore throat data, by performing pore network simulation calculation, oil-water two-phase relative permeability data of the rock sample to be tested can be rapidlyacquired, so that a corresponding oil-water two-phase relative permeability curve can be drawn.
Description
technical field [0001] The invention relates to a method for simulating the distribution characteristics of the oil-water two-phase of a core sample, in particular to a method for simulating the relative permeability of the oil-water two-phase based on constant-speed mercury injection, and belongs to the technical field of oil production. Background technique [0002] Two-phase relative permeability is an important parameter to describe the oil-water two-phase seepage in the reservoir. By analyzing the oil-water two-phase permeability curve, it can reflect many production dynamics of the reservoir in the process of water flooding development. At the same time, it can be used in reservoir engineering calculation and Oil-water two-phase permeability data are needed in the numerical simulation process. [0003] At present, the method of obtaining the relative permeability curve of oil-water two-phase is mainly through the experimental method, which is divided into steady-state ...
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IPC IPC(8): G01N15/08
CPCG01N15/082
Inventor 贾宁洪吕伟峰刘庆杰李彤马德胜吴康云杨济如王家禄杨胜建
Owner PETROCHINA CO LTD