CN-121998441-A - Determination method and device for heavy oil reservoir exploitation and electronic equipment

CN121998441ACN 121998441 ACN121998441 ACN 121998441ACN-121998441-A

Abstract

The application discloses a method, a device and electronic equipment for determining exploitation of a heavy oil reservoir, and relates to the technical field of oil and gas field development, wherein the method comprises the steps of determining at least one target influence factor of oil reservoir produced water under different water source types and target characteristic values corresponding to the target influence factors; and determining the duty ratio of different water source types in produced water of each production well based on the total characteristic value under each water source type and the actual characteristic value of the actual influence factor corresponding to each production well under the oil reservoir. The application can determine the water source type and the characteristic value of the oil reservoir produced water, and determine the duty ratio of different water source types in the produced water, thereby realizing the deployment of the production wells and improving the production efficiency of each production well.

Inventors

MA HONGFEI
WANG SHUQIN
ZHAO WENQI
HE CONGGE
JIANG LUYANG
SONG HANG
HAO FENGJUN
ZHAO LUN
BO BING
XU ANZHU
CHEN CHENG
YE YU
ZHANG CHENKAI
YUAN ZHIMING
LIU MINGHUI

Assignees

中国石油天然气集团有限公司
中国石油国际勘探开发有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (10)

1. A method for determining heavy oil reservoir exploitation is characterized by comprising the following steps: Determining at least one candidate influence factor of the oil reservoir produced water under various water source types and a characteristic value corresponding to each candidate influence factor based on at least one water source type corresponding to the oil reservoir produced water and a preset water layer influence factor; Screening the characteristic values according to preset characteristic thresholds, and determining at least one target influence factor of the oil reservoir produced water under different water source types and target characteristic values corresponding to the target influence factors; Determining total characteristic values corresponding to all target influence factors under the water source type based on a preset influence factor analysis algorithm and the target characteristic values under the water source type aiming at any water source type; and determining the duty ratio of different water source types in produced water of each production well based on the total characteristic value of each water source type and the actual characteristic value of the actual influence factor corresponding to each production well in the oil reservoir so as to realize the deployment of the production wells and finish the exploitation of the oil reservoir.
2. The method for determining heavy oil reservoir production according to claim 1, wherein the water source type includes an injected water source and a formation water source, and the determining at least one candidate influence factor of the reservoir produced water under each water source type and a characteristic value corresponding to each candidate influence factor based on at least one water source type corresponding to the reservoir produced water and a preset water layer influence factor includes: Determining at least one candidate injection water influence factor and a first characteristic value corresponding to each candidate injection water influence factor from injection water sources corresponding to oil reservoir produced water according to preset water layer influence factors; And determining at least one candidate formation water influence factor and a second characteristic value corresponding to each candidate formation water influence factor from the formation water source corresponding to the oil reservoir produced water according to the preset water layer influence factor.
3. The method for determining heavy oil reservoir exploitation according to claim 2, wherein the screening the feature values according to a preset feature threshold value to determine at least one target influence factor of the reservoir exploitation water under different water source types and a target feature value corresponding to each target influence factor comprises: Determining candidate injection water influence factors corresponding to first characteristic values larger than a preset characteristic threshold as target influence factors of oil reservoir produced water under the source of injection water, and determining first target characteristic values corresponding to the target influence factors, and And determining a candidate formation water influence factor corresponding to a second characteristic value larger than a preset characteristic threshold as a target influence factor of the oil reservoir produced water under the source of the formation water, and determining a second target characteristic value corresponding to the target influence factor.
4. A method of determining heavy oil reservoir production as claimed in claim 3, wherein the total eigenvalues include a first total eigenvalue, and the determining, for any one of the water source types, total eigenvalues corresponding to all of the target influencing factors for the water source type based on a preset influencing factor analysis algorithm and each of the target eigenvalues for the water source type includes: aiming at the injected water source, determining a first total characteristic value corresponding to all target influence factors under the injected water source based on a preset factor calculation formula and a first target characteristic value in a preset influence factor analysis algorithm.
5. The method according to claim 4, wherein the total eigenvalues include a second total eigenvalue, wherein the determining, for any one of the water source types, total eigenvalues corresponding to all of the target influencing factors for the water source type based on a preset influencing factor analysis algorithm and each of the target eigenvalues for the water source type comprises: And determining a second total characteristic value corresponding to all target influence factors under the formation water source based on a preset factor calculation formula and a second target characteristic value in a preset influence factor analysis algorithm aiming at the formation water source.
6. The method for determining heavy oil reservoir production according to claim 5, wherein determining the duty ratio of different water source types in produced water of each production well based on the total characteristic value of each water source type and the actual characteristic value of the actual influence factor corresponding to each production well of the oil reservoir comprises: Determining an actual total characteristic value corresponding to water produced by each production well based on an actual characteristic value of an actual influence factor corresponding to each production well under an oil reservoir; And determining the duty ratio of the produced water source type of each production well based on the actual total characteristic value, the first total characteristic value and the second total characteristic value.
7. The method for determining heavy oil reservoir production according to claim 6, wherein determining the actual total characteristic value corresponding to the produced water of each production well based on the actual characteristic value of the actual influence factor corresponding to each production well under the reservoir comprises: and determining the actual total characteristic value corresponding to the produced water of each production well according to the actual characteristic value of the actual influence factor corresponding to each production well under the oil reservoir and a preset factor calculation formula.
8. The device for determining the heavy oil reservoir exploitation is characterized by comprising the following components: the first determining module is used for determining at least one candidate influence factor of the oil reservoir produced water under various water source types and a characteristic value corresponding to each candidate influence factor based on at least one water source type corresponding to the oil reservoir produced water and a preset water layer influence factor; The second determining module is used for screening each characteristic value according to a preset characteristic threshold value and determining at least one target influence factor of the oil reservoir produced water under different water source types and a target characteristic value corresponding to each target influence factor; The third determining module is used for determining total characteristic values corresponding to all the target influence factors under the water source type according to a preset influence factor analysis algorithm and the target characteristic values under the water source type aiming at any water source type; And the fourth determining module is used for determining the duty ratio of different water source types in the produced water of each production well based on the total characteristic value of each water source type and the actual characteristic value of the actual influence factor corresponding to each production well in the oil reservoir so as to realize the deployment of the production wells and finish the exploitation of the oil reservoir.
9. An electronic device comprising a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor in communication with the memory via the bus when the electronic device is in operation, the machine-readable instructions being executable by the processor to perform the steps of the heavy oil reservoir production determination method of any one of claims 1-7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the method for determining heavy oil reservoir production as claimed in any of the preceding claims 1-7.

Description

Determination method and device for heavy oil reservoir exploitation and electronic equipment Technical Field The application relates to the technical field of oil and gas field development, in particular to a method and a device for determining heavy oil reservoir exploitation and electronic equipment. Background At present, heavy oil reservoirs are generally developed in a thermal recovery mode such as steam huff and puff, water for a steam boiler in the thermal recovery process is generally taken from local surface of an oil field, an underground water source or produced water and the like, and specifically, the treated water is injected into a boiler to be heated into steam for recovery of the heavy oil reservoirs. However, the thickened oil has the characteristics of large viscosity of crude oil and high oil-water flow rate, so the thickened oil is easily influenced by produced water in the development process, the water content of an oil well is changed rapidly, the elastic depressurization production pressure of an area of an oil reservoir close to side bottom water is quickly reduced, the water invasion range is larger and larger along with the gradual pushing of the side bottom water, the high water-containing well area is large, the production degree is low, the middle and low water-containing well areas of the oil well are influenced by different degrees of the produced water after being hugged and disbursed for multiple times, the period is quickly reduced, and the stable production is difficult, so the analysis of the produced water of the oil field is particularly important. Before date, analysis of heavy oil field produced water mainly appears in water treatment technology, traditional water treatment directions mainly include reinjection treatment technology, chemical method treatment technology, biological method treatment technology, ultrafiltration membrane treatment technology and the like, and the analysis and identification mainly aim at main components of water sources, specifically, a mine water bursting water source discrimination model or a gas field multi-factor water source identification model is built, and an entropy weight-fuzzy variable set model is applied to identify the coal mine water bursting water source, but the method cannot identify characteristics of the produced water and the like, so that the exploitation efficiency of oil reservoirs of the oil well is poor. Disclosure of Invention The embodiment of the application provides a method, a device and electronic equipment for determining heavy oil reservoir exploitation, which solve the technical problem of poor exploitation effect of the oil reservoir in the prior art, the embodiment provided by the application can determine the water source type and the characteristic value of the produced water of the oil reservoir, and determine the duty ratio of different water source types in the produced water, thereby realizing the deployment of the production wells and improving the production efficiency of each production well. In a first aspect of the embodiment of the present application, the embodiment of the present application provides a method for determining heavy oil reservoir recovery, including: Determining at least one candidate influence factor of the oil reservoir produced water under various water source types and a characteristic value corresponding to each candidate influence factor based on at least one water source type corresponding to the oil reservoir produced water and a preset water layer influence factor; Screening the characteristic values according to preset characteristic thresholds, and determining at least one target influence factor of the oil reservoir produced water under different water source types and target characteristic values corresponding to the target influence factors; Determining total characteristic values corresponding to all target influence factors under the water source type based on a preset influence factor analysis algorithm and the target characteristic values under the water source type aiming at any water source type; and determining the duty ratio of different water source types in produced water of each production well based on the total characteristic value of each water source type and the actual characteristic value of the actual influence factor corresponding to each production well in the oil reservoir so as to realize the deployment of the production wells and finish the exploitation of the oil reservoir. In a possible implementation manner, the water source types include an injection water source and a formation water source, and the determining at least one candidate influence factor of the oil reservoir produced water under each water source type and a characteristic value corresponding to each candidate influence factor based on at least one water source type corresponding to the oil reservoir produced water and a preset water layer influence factor includes: D