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Method, device and equipment for determining moisture content of argillaceous sandstone reservoir

A kind of argillaceous sandstone, the technique of determining the method, applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problems such as poor effect of medium and low porosity and permeability reservoirs, and achieve the goal of improving accuracy Effect

Pending Publication Date: 2022-03-11
PETROCHINA CO LTD
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Problems solved by technology

[0004] However, these two methods are based on the analysis of experimental data of high porosity and permeability rock samples, which are suitable for specific high porosity and permeability reservoirs, and are not effective for medium and low porosity and permeability reservoirs.

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  • Method, device and equipment for determining moisture content of argillaceous sandstone reservoir
  • Method, device and equipment for determining moisture content of argillaceous sandstone reservoir
  • Method, device and equipment for determining moisture content of argillaceous sandstone reservoir

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Embodiment Construction

[0060] 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 examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0061] The following is a brief introduction to the nouns involved in this application document.

[0062] Water Saturation: In oil reservoirs, the ratio of the volume of pores occupied by water to the volume of rock pores.

[0063] Reservoir permeability: A measure of the ability of fluid to pass through the effective pores of porous rock under pressure difference, expressed in K. It...

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Abstract

The invention provides a method, device and equipment for determining the moisture content of an argillaceous sandstone reservoir. The method comprises the steps that the water saturation Sw, the reservoir permeability K and the reservoir porosity phi of the argillaceous sandstone reservoir are obtained; determining irreducible water saturation Swi and residual oil saturation Sor according to the reservoir permeability K and the reservoir porosity phi; determining the water relative permeability Krw according to the water saturation Sw and the irreducible water saturation Swi; according to the water saturation Sw, the irreducible water saturation Swi and the residual oil saturation Sor, the oil relative permeability Kro is determined; determining the moisture content Fw of the argillaceous sandstone reservoir according to the water relative permeability Krw and the oil relative permeability Kro; the water content Fw is used for representing the water content condition of the argillaceous sandstone reservoir. By means of the method, the moisture content of the argillaceous sandstone reservoirs with different pore permeability indexes can be determined, and the accuracy of determining the moisture content of the argillaceous sandstone reservoirs with different pore permeability indexes is improved.

Description

technical field [0001] The embodiments of the present application relate to the technical field of oil field exploitation, and in particular to a method, device and equipment for determining the water content of argillaceous sandstone reservoirs. Background technique [0002] Water cut refers to the water content ratio of the reservoir under the condition of independent exploitation of the reservoir. Accurate acquisition of this index has important guiding significance for the development of oilfields. [0003] At present, the methods for obtaining water content mainly include movable water analysis method, water content calculation method using water saturation and other logging methods to determine the water content of shaly sandstone reservoirs. [0004] However, these two methods are based on the analysis of experimental data of high porosity and permeability rock samples, which are suitable for specific high porosity and permeability reservoirs, but not effective for me...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N15/08
CPCG01N33/246G01N15/08G01N15/088
Inventor 肖承文吴刚信毅张承森黄若坤王建伟李华玮王青柳先远周波田隆梅王华伟
Owner PETROCHINA CO LTD
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