CN-121993181-A - Method and device for determining oil content of reservoir under condition of oil-based drilling fluid, electronic equipment and storage medium

CN121993181ACN 121993181 ACN121993181 ACN 121993181ACN-121993181-A

Abstract

The invention discloses a method, a device, electronic equipment and a storage medium for determining oil content of a reservoir under the condition of oil-based drilling fluid, wherein the method comprises the steps of obtaining a target rock sample corresponding to the reservoir to be analyzed, wherein the target rock sample comprises a first rock sample which does not contain the oil-based drilling fluid and a second rock sample which contains the oil-based drilling fluid, determining a plurality of rock hydrocarbon components corresponding to the first rock sample and the second rock sample respectively, determining target hydrocarbon components corresponding to movable hydrocarbons in the plurality of rock hydrocarbon components according to the content of each rock hydrocarbon component corresponding to the first rock sample and the second rock sample, determining a movable hydrocarbon calculation model corresponding to the movable hydrocarbons and the target hydrocarbon components through multiple regression analysis, determining the movable hydrocarbon content of the reservoir to be analyzed according to the movable hydrocarbon calculation model, and more accurately predicting the movable hydrocarbon content of the reservoir, so that objective and accurate oil content data are provided for reservoir evaluation and oil gas resource development as basis.

Inventors

CHEN ZHIWEI
ZHOU FANHUA
WU YANGYANG
CHEN XI
HAN BO
WANG HAO
TU HONGJIANG
TIAN WEIZHI
WANG YU
ZHOU CHANGMIN
SONG MINGHUI
DU PENG
JIA XUEDONG
LI HAN
XU ZHE

Assignees

中国石油集团长城钻探工程有限公司
中国石油天然气集团有限公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (10)

1. A method for determining the oil content of a reservoir under conditions of an oil-based drilling fluid, comprising: Obtaining a target rock sample corresponding to a reservoir to be analyzed, wherein the target rock sample comprises a first rock sample which does not contain oil-based drilling fluid and a second rock sample which contains the oil-based drilling fluid; Determining a plurality of rock hydrocarbon components corresponding to the first rock sample and the second rock sample respectively, and determining a target hydrocarbon component corresponding to movable hydrocarbon in the plurality of rock hydrocarbon components according to the content of each rock hydrocarbon component corresponding to the first rock sample and the second rock sample; And determining a movable hydrocarbon calculation model corresponding to the movable hydrocarbon and the target hydrocarbon component through multiple regression analysis, and determining the movable hydrocarbon content of the reservoir to be analyzed according to the movable hydrocarbon calculation model.
2. The method of claim 1, wherein said determining a target hydrocarbon component corresponding to a mobile hydrocarbon from a plurality of said rock hydrocarbon components based on the content of each of said rock hydrocarbon components corresponding to said first rock sample and said second rock sample components comprises: determining the rock hydrocarbon components with the influence degree smaller than a preset degree range from a plurality of rock hydrocarbon components, wherein the influence degree is smaller than the preset degree range by the oil-based drilling fluid, and the rock hydrocarbon components are used as candidate hydrocarbon components; And respectively determining the component correlation degree between the candidate hydrocarbon components and the movable hydrocarbon, and determining the candidate hydrocarbon components with the component correlation degree reaching a preset correlation degree threshold as target hydrocarbon components corresponding to the movable hydrocarbon.
3. The method of claim 2, wherein said determining said rock hydrocarbon component from a plurality of said rock hydrocarbon components that is affected by said oil-based drilling fluid to a lesser extent than a predetermined extent comprises: Determining, for each of the rock hydrocarbon components, a first content of the rock hydrocarbon component corresponding to the first rock sample and a second content of the rock hydrocarbon component corresponding to the second rock sample; And determining the rock hydrocarbon components with the influence degree smaller than a preset degree range from a plurality of rock hydrocarbon components according to the first content and the second content corresponding to each rock hydrocarbon component, and taking the rock hydrocarbon components with the influence degree smaller than the preset degree range from the oil-based drilling fluid as candidate hydrocarbon components.
4. The method of claim 1, wherein the determining a mobile hydrocarbon calculation model corresponding to the mobile hydrocarbon and the target hydrocarbon component by multiple regression analysis comprises: Taking the movable hydrocarbon as a dependent variable and the target hydrocarbon component as an independent variable, and establishing a multiple linear regression model; Performing regression analysis on the multiple linear regression model according to a pre-established target data set to obtain a multiple linear regression equation, wherein the target data set comprises rock hydrocarbon component data corresponding to a plurality of sample rock samples; and determining the multiple linear regression equation as the movable hydrocarbon calculation model under the condition that the multiple linear regression equation meets a preset check condition.
5. The method of claim 1, wherein the determining the respective pluralities of rock hydrocarbon components for the first rock sample and the second rock sample comprises: Performing a rock pyrolysis experiment on the first rock sample to determine a plurality of rock hydrocarbon components corresponding to the first rock sample, and Rock pyrolysis experiments are performed on the second rock sample to determine a plurality of rock hydrocarbon components corresponding to the second rock sample.
6. The method of claim 1, further comprising, after determining the mobile hydrocarbon content of the reservoir to be analyzed according to the mobile hydrocarbon determination model: and determining the total oil content of the reservoir to be analyzed according to the movable hydrocarbon content and the cracking hydrocarbon content.
7. The method of claim 6, further comprising, after determining the total oil content of the reservoir to be analyzed based on the mobile hydrocarbon content and the cracked hydrocarbon content: And determining the oil saturation of the reservoir to be analyzed according to the total oil content, the rock density, the crude oil density and the porosity of the reservoir to be analyzed.
8. A device for determining the oil content of a reservoir under conditions of an oil-based drilling fluid, comprising: The rock sample acquisition module is used for acquiring a target rock sample corresponding to a reservoir to be analyzed, wherein the target rock sample comprises a first rock sample which does not contain oil-based drilling fluid and a second rock sample which contains the oil-based drilling fluid; the hydrocarbon component determining module is used for determining a plurality of rock hydrocarbon components corresponding to the first rock sample and the second rock sample respectively, and determining target hydrocarbon components corresponding to movable hydrocarbon in the plurality of rock hydrocarbon components according to the content of each rock hydrocarbon component corresponding to the first rock sample and the second rock sample; and the movable hydrocarbon content determining module is used for determining a movable hydrocarbon calculation model corresponding to the movable hydrocarbon and the target hydrocarbon component through multiple regression analysis, and determining the movable hydrocarbon content of the reservoir to be analyzed according to the movable hydrocarbon calculation model.
9. An electronic device, the electronic device comprising: At least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of determining the oil content of a reservoir under oil-based drilling fluid conditions of any one of claims 1-7.
10. A computer readable storage medium storing computer instructions for causing a processor to perform the method of determining the oil content of a reservoir under conditions of an oil-based drilling fluid of any one of claims 1-7.

Description

Method and device for determining oil content of reservoir under condition of oil-based drilling fluid, electronic equipment and storage medium Technical Field The invention relates to the technical field of oil and gas exploration, in particular to a method and a device for determining the oil content of a reservoir under the condition of oil-based drilling fluid, electronic equipment and a storage medium. Background In the oil and gas resource exploration and development process, accurate assessment of the movable hydrocarbon content of a reservoir is one of the key links. In the related art, it is often difficult to distinguish the effects of naturally occurring hydrocarbon components in a reservoir from the effects of oil-based drilling fluids introduced during drilling, resulting in inaccurate evaluation results. In particular, oil-based drilling fluids may penetrate into the pores of the rock, altering the hydrocarbon composition in the rock, thereby affecting the assessment of the mobile hydrocarbon content of the reservoir. Disclosure of Invention The invention provides a method, a device, electronic equipment and a storage medium for determining the oil content of a reservoir under the condition of oil-based drilling fluid, and aims to solve the problem that the evaluation of the movable hydrocarbon content of the reservoir is inaccurate due to the fact that hydrocarbon components naturally existing in the reservoir are difficult to accurately distinguish from the influence of the oil-based drilling fluid introduced in the drilling process in the related technology. According to an aspect of the present invention, there is provided a method of determining the oil content of a reservoir under conditions of an oil-based drilling fluid, the method comprising: Obtaining a target rock sample corresponding to a reservoir to be analyzed, wherein the target rock sample comprises a first rock sample which does not contain oil-based drilling fluid and a second rock sample which contains the oil-based drilling fluid; Determining a plurality of rock hydrocarbon components corresponding to the first rock sample and the second rock sample respectively, and determining a target hydrocarbon component corresponding to movable hydrocarbon in the plurality of rock hydrocarbon components according to the content of each rock hydrocarbon component corresponding to the first rock sample and the second rock sample; And determining a movable hydrocarbon calculation model corresponding to the movable hydrocarbon and the target hydrocarbon component through multiple regression analysis, and determining the movable hydrocarbon content of the reservoir to be analyzed according to the movable hydrocarbon calculation model. According to another aspect of the present invention there is provided an apparatus for determining the oil content of a reservoir under conditions of an oil-based drilling fluid, the apparatus comprising: The rock sample acquisition module is used for acquiring a target rock sample corresponding to a reservoir to be analyzed, wherein the target rock sample comprises a first rock sample which does not contain oil-based drilling fluid and a second rock sample which contains the oil-based drilling fluid; the hydrocarbon component determining module is used for determining a plurality of rock hydrocarbon components corresponding to the first rock sample and the second rock sample respectively, and determining target hydrocarbon components corresponding to movable hydrocarbon in the plurality of rock hydrocarbon components according to the content of each rock hydrocarbon component corresponding to the first rock sample and the second rock sample; and the movable hydrocarbon content determining module is used for determining a movable hydrocarbon calculation model corresponding to the movable hydrocarbon and the target hydrocarbon component through multiple regression analysis, and determining the movable hydrocarbon content of the reservoir to be analyzed according to the movable hydrocarbon calculation model. According to another aspect of the present invention, there is provided an electronic apparatus including: At least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of determining the oil content of a reservoir under conditions of an oil-based drilling fluid of any one of the embodiments of the present invention. According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to perform the method for determining the oil content of a reservoir under conditions of an oil-based drilling fluid according to any one of the embodiments of the present invention. According to the technical scheme provided by the embodiment of the invention,