CN-121998462-A - Carbon dioxide geological sequestration quantity grading and evaluating method, system, equipment and medium

CN121998462ACN 121998462 ACN121998462 ACN 121998462ACN-121998462-A

Abstract

The invention relates to the technical field of carbon dioxide geological storage, and discloses a method, a system, equipment and a medium for grading and evaluating the carbon dioxide geological storage, wherein the method, the system, the equipment and the medium are used for evaluating the carbon dioxide geological storage in a progressive manner in the region to be evaluated by combining geological data of the region to be evaluated and considering the carbon dioxide storage efficiency coefficient influenced by technical conditions of a process and the carbon dioxide storage economic efficiency coefficient influenced by policies, laws and regulations and economic conditions, so that the carbon dioxide geological storage can be evaluated more objectively and systematically, the evaluation precision of the carbon dioxide geological storage is greatly improved, and effective and reliable data guidance is provided for developing carbon dioxide geological storage work.

Inventors

LI LINTAO
LU JIANRONG
SHI GUANGYU
WANG ZHAO
GUO GANG
KANG XIAODONG
LI YANZUN
GUO KAI
BAI YUHU
FANG MAOJUN
YU HANG
SUN LILI

Assignees

中海石油(中国)有限公司
中海石油（中国）有限公司北京研究中心

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (10)

1. A method for grading and evaluating carbon dioxide geological storage, comprising the steps of: Obtaining geological data, a carbon dioxide sealing efficiency coefficient and a carbon dioxide sealing economic efficiency coefficient of a region to be evaluated; obtaining theoretical carbon dioxide sealing quantity of the region to be evaluated according to geological data of the region to be evaluated; Determining an effective reservoir of the region to be evaluated according to the geological data of the region to be evaluated, and obtaining the geological data of the effective reservoir; obtaining effective carbon dioxide sealing quantity of the region to be evaluated according to geological data of the effective reservoir; according to the carbon dioxide sealing efficiency coefficient, combining the effective carbon dioxide sealing quantity of the region to be evaluated to obtain the technical carbon dioxide sealing quantity of the region to be evaluated; And according to the economic efficiency coefficient of carbon dioxide sealing, combining the technical carbon dioxide sealing quantity of the region to be evaluated to obtain the economic carbon dioxide sealing quantity of the region to be evaluated.
2. The method for grading and evaluating the geological carbon dioxide sequestration amount according to claim 1, wherein the obtaining the theoretical carbon dioxide sequestration amount of the region to be evaluated according to the geological data of the region to be evaluated comprises: Obtaining the total area of a reservoir, the rolling thickness of the reservoir, the average porosity of the reservoir and the density of carbon dioxide under stratum conditions of the region to be evaluated according to geological data of the region to be evaluated; and obtaining the theoretical carbon dioxide sealing quantity of the region to be evaluated according to the total area of the reservoir, the rolling thickness of the reservoir, the average porosity of the reservoir and the carbon dioxide density under the stratum condition.
3. The method for classifying and evaluating carbon dioxide geological storage according to claim 2, wherein the expression of the theoretical carbon dioxide storage is: M tr ＝ρ CO2 ×A×H×Φ/10 6 , In the expression of the theoretical carbon dioxide sequestration amount, M tr represents the theoretical carbon dioxide sequestration amount of the region to be evaluated, ρ CO2 represents the carbon dioxide density under the formation conditions, a represents the total reservoir area of the region to be evaluated, H represents the reservoir flattening thickness of the region to be evaluated, and Φ represents the average reservoir porosity of the region to be evaluated.
4. The method for grading and evaluating carbon dioxide geological storage according to claim 2, wherein the step of obtaining the effective carbon dioxide storage of the region to be evaluated according to the geological data of the effective reservoir comprises the steps of: According to geological data of the effective reservoir, the effective area of the site-level carbon dioxide-sealing-up of the effective reservoir, the effective reservoir thickness of the site-level carbon dioxide-sealing-up and the effective porosity of the site-level carbon dioxide-sealing-up reservoir are obtained; And obtaining the effective carbon dioxide sealing quantity of the region to be evaluated according to the effective area of the site-level energy sealing carbon dioxide of the effective reservoir, the effective reservoir thickness of the site-level energy sealing carbon dioxide and the effective porosity of the site-level energy sealing carbon dioxide reservoir.
5. The method for classifying and evaluating carbon dioxide geological storage according to claim 4, wherein the expression of the effective carbon dioxide storage is: M ef ＝ρ CO2 ×A e ×H e ×Φ e /10 6 , In the expression of the effective carbon dioxide sequestration amount, M ef represents the effective carbon dioxide sequestration amount of the region to be evaluated, ρ CO2 represents the carbon dioxide density under the formation conditions, a e represents the effective area of the effective reservoir where the site level can sequester carbon dioxide, H e represents the effective reservoir thickness of the effective reservoir where the site level can sequester carbon dioxide, Φ e represents the effective porosity of the effective reservoir where the site level can sequester carbon dioxide.
6. The method for classifying and evaluating carbon dioxide geological storage according to claim 4, wherein the technical carbon dioxide storage is expressed as: M tc ＝M ef ×K u , In the expression of the technical carbon dioxide sequestration amount, M tc represents the technical carbon dioxide sequestration amount of the region to be evaluated, M ef represents the effective carbon dioxide sequestration amount of the region to be evaluated, and K u represents the carbon dioxide sequestration efficiency coefficient of the region to be evaluated.
7. The method for classifying and evaluating carbon dioxide geological storage according to claim 6, wherein the expression of the economical carbon dioxide storage is: M ec ＝M tc ×E e , In the expression of the economic carbon dioxide sequestration amount, M ec represents the economic carbon dioxide sequestration amount of the region to be evaluated, M tc represents the technical carbon dioxide sequestration amount of the region to be evaluated, and E e represents the carbon dioxide sequestration economic efficiency coefficient of the region to be evaluated.
8. A carbon dioxide geological sequestration grading and evaluation system, comprising: The data acquisition module is used for acquiring geological data, a carbon dioxide sealing efficiency coefficient and a carbon dioxide sealing economic efficiency coefficient of the region to be evaluated; The first evaluation module is used for obtaining the theoretical carbon dioxide sealing quantity of the region to be evaluated according to the geological data of the region to be evaluated; the data processing module is used for determining an effective reservoir of the region to be evaluated according to the geological data of the region to be evaluated and obtaining the geological data of the effective reservoir; The second evaluation module is used for obtaining the effective carbon dioxide sealing quantity of the area to be evaluated according to the geological data of the effective reservoir; the third evaluation module is used for obtaining the technical carbon dioxide sealing quantity of the region to be evaluated by combining the effective carbon dioxide sealing quantity of the region to be evaluated according to the carbon dioxide sealing efficiency coefficient; And the fourth evaluation module is used for obtaining the economic carbon dioxide sealing quantity of the region to be evaluated by combining the technical carbon dioxide sealing quantity of the region to be evaluated according to the carbon dioxide sealing economic efficiency coefficient.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of grading and evaluating carbon dioxide geological sequestration according to any one of claims 1 to 7 when executing the program.
10. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the method of grading and evaluating carbon dioxide geological sequestration according to any one of claims 1 to 7.

Description

Carbon dioxide geological sequestration quantity grading and evaluating method, system, equipment and medium Technical Field The invention relates to the technical field of carbon dioxide geological storage, in particular to a method, a system, equipment and a medium for grading and evaluating carbon dioxide geological storage quantity. Background Carbon capture, utilization and sequestration (CCUS) refers to a technology that captures and separates Carbon dioxide from emission sources such as energy utilization and industrial production, or different Carbon sources such as tail gas and air from biomass utilization, and conveys the Carbon dioxide to a suitable site for utilization or sequestration, and finally realizes Carbon dioxide emission reduction. According to the differences of the sealed geologic bodies, the CCUS can be generally divided into two major types, namely oil displacement utilization (CCUS) and saline water layer sealing (CCS), wherein the CCUS aims at displacing oil gas, improving oil gas recovery efficiency and taking into consideration geological sealing, and the CCUS aims at directly sealing, injecting carbon dioxide into a deep saline water layer, realizing long-term insulation of the carbon dioxide and the atmosphere and reducing greenhouse effect. The existing carbon dioxide geological storage quantity evaluation method mainly comprises a volumetric method and a mechanical method, and the volumetric method is generally adopted because the mechanical method has the problems of difficult parameter value, non-uniform standard and the like in the use process, but enterprises generally adopt different volumetric methods to evaluate the carbon dioxide storage quantity according to actual existing data, and lack of a systematic carbon dioxide storage quantity evaluation method leads to large difference of evaluation results of the carbon dioxide geological storage quantity obtained by the different volumetric methods. Therefore, there is a need for a systematic classification and evaluation method for carbon dioxide geological formations to improve the accuracy of evaluating carbon dioxide geological formations. Disclosure of Invention The invention provides a method, a system, equipment and a medium for grading and evaluating carbon dioxide geological storage quantity, which are used for solving the defects of low precision and poor guidance of evaluating the carbon dioxide geological storage quantity in the existing carbon dioxide geological storage quantity evaluation method. The invention provides a grading and evaluating method for carbon dioxide geological storage quantity, which comprises the following steps: Obtaining geological data, a carbon dioxide sealing efficiency coefficient and a carbon dioxide sealing economic efficiency coefficient of a region to be evaluated; obtaining theoretical carbon dioxide sealing quantity of the region to be evaluated according to geological data of the region to be evaluated; Determining an effective reservoir of the region to be evaluated according to the geological data of the region to be evaluated, and obtaining the geological data of the effective reservoir; obtaining effective carbon dioxide sealing quantity of the region to be evaluated according to geological data of the effective reservoir; according to the carbon dioxide sealing efficiency coefficient, combining the effective carbon dioxide sealing quantity of the region to be evaluated to obtain the technical carbon dioxide sealing quantity of the region to be evaluated; And according to the economic efficiency coefficient of carbon dioxide sealing, combining the technical carbon dioxide sealing quantity of the region to be evaluated to obtain the economic carbon dioxide sealing quantity of the region to be evaluated. In one embodiment, the obtaining the theoretical carbon dioxide sequestration amount of the region to be evaluated according to the geological data of the region to be evaluated includes: Obtaining the total area of a reservoir, the rolling thickness of the reservoir, the average porosity of the reservoir and the density of carbon dioxide under stratum conditions of the region to be evaluated according to geological data of the region to be evaluated; and obtaining the theoretical carbon dioxide sealing quantity of the region to be evaluated according to the total area of the reservoir, the rolling thickness of the reservoir, the average porosity of the reservoir and the carbon dioxide density under the stratum condition. In one embodiment, the theoretical carbon dioxide sequestration amount is expressed as: Mtr＝ρCO2×A×H×φ/106, In the expression of the theoretical carbon dioxide sequestration amount, M tr represents the theoretical carbon dioxide sequestration amount of the region to be evaluated, ρ CO2 represents the carbon dioxide density under the formation conditions, a represents the total reservoir area of the region to be evaluated, H represents the reservoir flat