Method and device for acquiring pore throat characteristic parameters, computer equipment and storage medium
A technology of characteristic parameters and acquisition methods, applied in the field of oil and gas exploration, can solve the problems of low accuracy of pore throat characteristic parameters and inability to evaluate the properties of caves
Pending Publication Date: 2021-02-05
PETROCHINA CO LTD
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[0004] In the current related technologies, NMR is limited by factors such as paramagnetic ion diffusion and magnetic field gradient inside the rock, and cannot evaluate the cave properties of unsaturated water on the rock surface, resulting in low accuracy of the obtained pore-throat characteristic parameters
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[0050]Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.
[0051] It should be understood that "several" mentioned herein refers to one or more, and "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and / or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character " / " genera...
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Abstract
The invention relates to a method and a device for acquiring pore throat characteristic parameters, computer equipment and a storage medium, and relates to the technical field of oil and gas exploration. The method comprises the following steps: obtaining mercury injection saturation of a first type hole according to feature information of a rock sample and feature data of the first type hole of the rock sample; obtaining a first capillary pressure curve indicating the volume ratio of the second type of holes in the rock sample; obtaining a second capillary pressure curve according to the first capillary pressure curve, the mercury injection saturation and the feature data of the first type of holes; and acquiring pore throat characteristic parameters of the rock sample according to the second capillary pressure curve. According to the scheme, the accuracy of evaluating the rock pore throat structure by the capillary pressure curve is improved.
Description
technical field [0001] The present application relates to the technical field of oil and gas exploration, in particular to a method, device, computer equipment and storage medium for acquiring characteristic parameters of pore throats. Background technique [0002] The capillary pressure curve can reflect the distribution of different pores in the rock, and is an important basis for evaluating the pore-throat structure of the rock and the seepage capacity of the reservoir rock. [0003] In related technologies, since the nuclear magnetic resonance relaxation time T2 is positively correlated with the radius of the pore throat, technicians obtain the capillary pressure curve through the distribution of the nuclear magnetic resonance relaxation time T2. [0004] In the current related technologies, NMR is limited by factors such as the diffusion of paramagnetic ions and the gradient of the magnetic field inside the rock, so it cannot evaluate the properties of unsaturated water...
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IPC IPC(8): G01N15/08G01N23/046G06T15/00
CPCG01N15/088G01N15/08G01N23/046G06T15/00
Inventor 李骞李滔赵梓寒张飞戚涛李秋姜艺张寰一吴婷婷江俊
Owner PETROCHINA CO LTD