An experimental data processing method for reservoir dynamic capillary effect evaluation

An experimental data processing and dynamic technology, applied in suspension and porous material analysis, instrumentation, permeability/surface area analysis, etc., can solve problems such as delay in response time test data

Active Publication Date: 2020-09-04
SOUTHWEST PETROLEUM UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Especially in the case of high fluid viscosity or rapid pressure change, the response time of the pressure sensor will delay the test data, and it is necessary to correct the measured fluid pressure

Method used

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  • An experimental data processing method for reservoir dynamic capillary effect evaluation
  • An experimental data processing method for reservoir dynamic capillary effect evaluation
  • An experimental data processing method for reservoir dynamic capillary effect evaluation

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Embodiment Construction

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the present invention will be further described below in conjunction with the drawings and application examples of experimental data processing methods in the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0050] details as follows:

[0051] Such as figure 1 As shown, it is the specific flow chart of the data processing method. The dynamic capillary effect evaluation experiment is carried out on the core of an oilfield. The steps are as follows:

[0052] 1. If figure 2 As shown, the data points are collected for this example. During the experiment, from the first water phase pressure test point 1, the second water phase pressure test point 2, the first oil phase...

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Abstract

The invention discloses a method for processing experimental data of dynamic capillary effect evaluation experiments of an oil reservoir, and the method comprises the following steps: (1) arrangement of basic parameters; (2) determination of rock core average water saturation and average oil saturation; (3) determination of dynamic capillary force, to be more specific, in-situ dynamic capillary force detected at each point is corrected, the geometric center of a rock core, an oil phase and a water phase is determined, essence phase average oil phase pressure <Po> and water phase pressure <Pw> are calculated, and the dynamic capillary forceis determine; and (4) determination of oil phase and water phase dynamic relative permeability, to be more specific, effective water saturation is calculated, center water saturation point with water saturation of Sp in capillary pressure curve is taken, the capillary pressure corresponding to the water saturation Sp is P, logarithmic coordinate slope (F) of the point is calculated, parameter m can be obtained by Genuchten model fitting, and water phase dynamic relative permeability (Krw) and oil phase dynamic relative permeability (Kro) can be calculated respectively.

Description

technical field [0001] The invention belongs to the technical field of laboratory experiments for oil and gas field development, and in particular relates to a data processing method for dynamic capillary effect evaluation experiments. Background technique [0002] Dynamic capillary effect, that is, in the process of oil-water two-phase seepage, capillary force and relative permeability are not only a function of saturation, but also a function of saturation change rate. Typically, the capillary forces used in studies are measured under static or quasi-static conditions, ie the saturation distribution does not change over time. However, since the 1860s, people have discovered that the capillary phenomenon produced by multiphase seepage in porous media is dynamic. The difference between static capillary force and dynamic capillary force has been confirmed by many studies, especially in low-permeability or tight oil reservoirs, the difference is even greater. The difference ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 李海涛李颖崔小江卢昱李斌斌蒋贝贝阳明君王科
Owner SOUTHWEST PETROLEUM UNIV
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