CN-121997785-A - Method, system, electronic equipment and medium for simulating oil reservoir microbial oil recovery and displacement values

CN121997785ACN 121997785 ACN121997785 ACN 121997785ACN-121997785-A

Abstract

The invention relates to a method, system electronic equipment and medium for simulating oil recovery and displacement values of oil deposit microorganisms, and belongs to the technical field of oil gas development. The method comprises the steps of constructing an oil reservoir microbial reaction dynamics equation according to results of an oil reservoir microbial ternary oil extraction system experiment, determining oil reservoir characteristic parameters after steam flooding based on dynamic history fitting of steam injection development stage production, simulating oil reservoir microbial cold recovery oil displacement based on the oil reservoir microbial reaction dynamics equation, an oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding, and obtaining an oil reservoir microbial cold recovery oil displacement scheme according to simulation results of microbial cold recovery oil displacement. According to the invention, the oil reservoir microbial reaction dynamics equation is determined, so that the oil reservoir microbial oil displacement numerical simulation is realized, meanwhile, the dynamic history fitting technology is combined in the steam injection development stage, the characteristic parameters of the oil reservoir after steam flooding are determined, and the actual oil reservoir condition of full reduction during oil reservoir microbial oil extraction and displacement numerical simulation is improved.

Inventors

ZHENG AIPING
LI XUAN
JI NAN
SHI XIAORONG
Huang Houchuan
SONG DONG
JU SHICHANG
Guli to Nal Maimaiti
JIA YUFENG
LI SIQI

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (14)

1. The method for simulating the oil recovery and displacement values of the oil reservoir microorganisms is characterized by comprising the following steps of: Constructing an oil reservoir microbial reaction kinetic equation according to the result of an oil reservoir microbial ternary oil extraction system experiment; determining the characteristic parameters of the oil reservoir after steam flooding based on the dynamic history fit of the steam injection development stage; simulating the microbial cold oil recovery and displacement of the oil deposit based on an oil deposit microbial reaction kinetic equation, an oil deposit three-dimensional geological model and the characteristic parameters of the oil deposit after steam flooding; And obtaining the microbial cold-production oil displacement scheme of the oil reservoir according to the simulation result of microbial cold-production oil displacement.
2. The method for simulating the oil recovery and displacement values of the oil reservoir microorganisms according to claim 1, wherein the construction of the oil reservoir microorganism reaction kinetic equation according to the results of the oil reservoir microorganism ternary oil recovery system experiment comprises the following steps: carrying out an oil reservoir microbial ternary oil extraction system experiment; according to the result of the oil reservoir microbial ternary oil extraction system experiment, determining microbial reaction kinetic components of an oil reservoir hydrocarbon degradation and directional activation mechanism and parameters of the components; and (3) establishing a microbial reaction kinetic equation of the oil reservoir by combining microbial reaction kinetic components of the oil reservoir hydrocarbon degradation and directional activation mechanism.
3. The method for simulating the oil reservoir microbial oil recovery and displacement values according to claim 2, wherein the step of performing an oil reservoir microbial ternary oil recovery system experiment comprises the following steps: screening experiments of functional microorganisms according to the characteristics of the flora structure in the target crude oil reservoir and the oil reservoir environment; Performing an activated nutrient screening experiment according to the screened microorganism functional bacteria and the target oil reservoir crude oil; And performing an auxiliary activator screening experiment according to the screened microorganism functional bacteria, the screened activating nutrient and the target reservoir crude oil.
4. The method for simulating the numerical value of oil recovery and displacement of a reservoir microorganism according to claim 2, wherein the dynamic components of the microbial reaction comprise microorganisms, heavy oil, light oil, nutrients, carbon sources, biosurfactants, foam, methane, carbon dioxide and water.
5. The method for simulating the numerical simulation of oil recovery and displacement of microorganisms in an oil reservoir according to claim 1, wherein the equation of the dynamics of the microbial reaction in the oil reservoir comprises an equation of the dynamics of the microbial propagation reaction, an equation of the biodegradation of heavy components in the oil, an equation of the foam oil generated by the microorganisms, an equation of the elimination and destruction of foam oil and an equation of the hydrolysis of death of the microorganisms.
6. The method for simulating the microbial oil recovery and displacement of a reservoir according to claim 1, wherein the characteristic parameters of the reservoir after steam flooding comprise oil reservoir reserves, recovery, residual oil reserves and recovery degree.
7. The method for simulating the oil reservoir microbial oil recovery and displacement numerical value according to any one of claims 1 to 6, wherein the method for simulating the oil reservoir microbial cold recovery and displacement is based on an oil reservoir microbial reaction kinetic equation, an oil reservoir three-dimensional geological model and oil reservoir characteristic parameters after steam flooding and comprises the following steps: Simulating reinjection displacement effects of different oil deposit pretreatment process parameters in oil deposit microbial mining and flooding according to an oil deposit microbial reaction kinetic equation, an oil deposit three-dimensional geological model and oil deposit characteristic parameters after steam flooding; simulating reinjection displacement effects of different injection well patterns in the oil reservoir microbial cold recovery displacement under the same oil reservoir pretreatment process parameters according to an oil reservoir microbial reaction kinetic equation, an oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding; And simulating reinjection displacement effects of different microorganism circulation injection and production process parameters in the oil reservoir microorganism cold-production oil displacement under the same oil reservoir pretreatment process parameters and the same oil injection and production well network according to an oil reservoir microorganism reaction dynamics equation, an oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding.
8. The method for simulating the oil recovery and displacement numerical simulation of the oil reservoir microorganisms according to claim 7, wherein the simulating the reinjection and displacement effects of different oil reservoir pretreatment process parameters in the oil reservoir microorganisms according to the oil reservoir microorganism reaction dynamics equation, the oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding comprises the following steps: simulating reinjection displacement effects of different pretreatment injection amounts of single-well microorganisms before reinjection displacement of microorganisms under the same pretreatment well soaking time according to an oil deposit microorganism reaction dynamics equation, an oil deposit three-dimensional geological model and oil deposit characteristic parameters after steam flooding; Simulating reinjection displacement effects of different pretreatment well-stewing times under the same pretreatment injection quantity of single-well microorganisms before reinjection displacement of microorganisms according to an oil deposit microorganism reaction dynamics equation, an oil deposit three-dimensional geological model and oil deposit characteristic parameters after steam flooding; and simulating reinjection displacement effects of different plugging pretreatment schemes of the steam channeling channels around the injection well under the condition that the single-well microorganisms have the same pretreatment injection quantity and the same well-stewing time before reinjection displacement of the microorganisms according to an oil deposit microorganism reaction dynamics equation, an oil deposit three-dimensional geological model and oil deposit characteristic parameters after steam flooding.
9. The method for simulating the microbial oil recovery and displacement numerical simulation of an oil reservoir according to claim 7, wherein the method for simulating the microbial circulating injection and production process in the microbial cold oil recovery and displacement of the oil reservoir under the same oil reservoir pretreatment process parameters and injection well patterns according to the oil reservoir microbial reaction dynamics equation, the oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding comprises the following steps: Simulating reinjection displacement effects of different injection speeds in microbial circulation injection and production under the same oil reservoir pretreatment process parameters, injection well patterns, mining ratios, reinjection liquid bacteria concentration, reinjection temperature and injection modes according to an oil reservoir microbial reaction dynamics equation, an oil reservoir three-dimensional geological model and oil reservoir characteristic parameters after steam flooding; Simulating reinjection displacement effects of different mining ratios in microbial circulation injection and production under the conditions of the same oil reservoir pretreatment process parameters, the same injection well pattern, the same injection speed, the same reinjection liquid bacteria concentration, the same reinjection temperature and the same injection mode according to an oil reservoir microbial reaction dynamics equation, an oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding; Simulating reinjection displacement effects of different reinjection liquid bacteria concentrations in microbial circulation injection and production under the same oil reservoir pretreatment process parameters, the same injection well pattern, injection speed, injection ratio, reinjection temperature and injection mode according to an oil reservoir microbial reaction dynamics equation, an oil reservoir three-dimensional geological model and oil reservoir characteristic parameters after steam flooding; Simulating reinjection displacement effects of different injection modes in microbial circulation injection and production under the conditions of the same oil reservoir pretreatment process parameters, the same injection well pattern, the same injection speed, the same injection ratio, the reinjection temperature and the reinjection liquid fungus concentration according to an oil reservoir microbial reaction kinetic equation, an oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding; And simulating reinjection displacement effects of different reinjection temperatures in microbial circulation injection and production under the conditions of the same oil reservoir pretreatment process parameters, the same injection well pattern, the same injection speed, the same injection ratio, the same reinjection liquid bacteria concentration and the same injection mode according to an oil reservoir microbial reaction dynamics equation, an oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding.
10. The method for simulating the oil reservoir microbial oil recovery and displacement numerical value according to claim 1, wherein the step of obtaining the oil reservoir microbial oil recovery and displacement scheme according to the simulation result of microbial oil recovery and displacement comprises the following steps: Determining technological parameters of an oil reservoir pretreatment process in oil reservoir microbial recovery and flooding according to the simulation result of the oil reservoir pretreatment process; determining a well pattern of the oil reservoir in the microbial production and flooding according to the simulation result of the well pattern adjustment; and determining the technological parameters of the microbial circulating injection and production process in the oil reservoir microbial production and flooding according to the simulation result of the microbial circulating injection and production process in the microbial production and flooding.
11. An oil reservoir microorganism oil recovery and displacement numerical simulation system is characterized by comprising: the power module is used for constructing an oil reservoir microbial reaction kinetic equation according to the result of an oil reservoir microbial ternary oil extraction system experiment; The characteristic module is used for determining the characteristic parameters of the oil reservoir after steam flooding based on dynamic history fitting of steam injection development stage production; the simulation module is used for simulating the cold oil recovery and displacement of the oil deposit microorganisms based on the oil deposit microorganism reaction kinetic equation, the oil deposit three-dimensional geological model and the characteristic parameters of the oil deposit after the steam flooding; and the obtaining module is used for obtaining the microbial cold-production oil displacement scheme of the oil reservoir according to the simulation result of the microbial cold-production oil displacement.
12. The oil reservoir microbial oil recovery and displacement numerical simulation system according to claim 11, wherein the simulation module comprises a pretreatment process simulation sub-module, a production pattern simulation sub-module and a circulation process simulation sub-module; The pretreatment process simulation submodule is used for simulating the reinjection displacement effect of different oil deposit pretreatment process parameters in oil deposit microbial mining and flooding according to an oil deposit microbial reaction kinetic equation, an oil deposit three-dimensional geological model and oil deposit characteristic parameters after steam flooding; the oil-well pattern simulation submodule is used for simulating reinjection displacement effects of different oil-well patterns in oil-well microbial cold-production displacement according to an oil-well microbial reaction kinetic equation, an oil-well three-dimensional geological model and oil-well characteristic parameters after steam flooding under the same oil-well pretreatment process parameters; The circulation process simulation submodule is used for simulating reinjection displacement effects of different microorganism circulation injection and production process parameters in the oil reservoir microorganism cold-production oil displacement under the same oil reservoir pretreatment process parameters and the same oil injection and production well network according to an oil reservoir microorganism reaction kinetic equation, an oil reservoir three-dimensional geological model and the oil reservoir characteristic parameters after steam flooding.
13. An electronic device comprising a processor coupled to a memory; The memory is used for storing a computer program; the processor for executing the computer program stored in the memory to cause the electronic device to perform the method of any one of claims 1 to 10.
14. A computer readable storage medium, characterized in that the computer readable storage medium stores a program or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 10.

Description

Method, system, electronic equipment and medium for simulating oil reservoir microbial oil recovery and displacement values Technical Field The invention belongs to the technical field of oil gas development, and particularly relates to a method, a system electronic device and a medium for simulating oil recovery and displacement values of oil reservoirs by microorganisms. Background Research shows that the oil reservoir has rich oil extraction functional bacteria in the areas with low steam non-sweep and sweep degree, has the foundation for the internal use of microorganisms, utilizes the microorganisms to replace steam for crude oil development, and can form a green, low-carbon, economical and effective crude oil extraction mode. However, the method is influenced by complex flora structures and residual oil distribution after steam displacement, the difference of microbial oil extraction effects of oil wells in different areas is large, and the method for regulating and controlling microbial oil flooding injection and extraction parameters is lack of on-site implementation. In order to improve the regulation and control efficiency of the on-site microbial oil-driving injection and production parameters, a microbial oil-driving numerical simulation technology is generally adopted to establish reasonable injection and production parameters and regulation and control strategies of microbial oil-driving under different residual oil distribution modes after steam injection and development, and the on-site microbial oil-driving injection and production is guided, so that the oil-driving efficiency of different development stages of microbial cold production is improved. The microbial oil displacement at the later stage of steam injection development of shallow crude oil has the first and second difficulties. The difficulty is firstly that the variety and the abundance of oil extraction functional bacteria after the oil well steam flooding in different areas are reduced and the degradation function is reduced under the influence of the steam height Wen Quti, the difficulty of endogenous activation and recycling in an oil reservoir is increased, and a reasonable bacteria reservoir pretreatment process is required to be simulated and optimized. And secondly, development of a water washing channel formed by steam, wherein the occurrence state of residual oil tends to be scattered, and the contribution of various technical combinations such as well pattern adjustment, water flooding and water channeling control and the like to the improvement of the microbial oil displacement efficiency is required to be optimized. The existing microorganism cold recovery numerical simulation technology lacks a matched technical research on improving the microorganism oil recovery and displacement efficiency under the conditions of complex flora structure and residual oil in the later period of crude oil steam injection development. Disclosure of Invention Aiming at the problems, the invention provides a method, a system electronic device and a medium for simulating oil recovery and displacement values of oil deposit microorganisms. The first object of the invention is to provide a method for simulating the oil recovery and displacement values of oil reservoirs by microorganisms, which comprises the following steps: Constructing an oil reservoir microbial reaction kinetic equation according to the result of an oil reservoir microbial ternary oil extraction system experiment; determining the characteristic parameters of the oil reservoir after steam flooding based on the dynamic history fit of the steam injection development stage; simulating the microbial cold oil recovery and displacement of the oil deposit based on an oil deposit microbial reaction kinetic equation, an oil deposit three-dimensional geological model and the characteristic parameters of the oil deposit after steam flooding; And obtaining the microbial cold-production oil displacement scheme of the oil reservoir according to the simulation result of microbial cold-production oil displacement. In a specific embodiment of the present invention, the construction of the reservoir microbial reaction kinetic equation according to the result of the reservoir microbial ternary oil recovery system experiment includes: carrying out an oil reservoir microbial ternary oil extraction system experiment; according to the result of the oil reservoir microbial ternary oil extraction system experiment, determining microbial reaction kinetic components of an oil reservoir hydrocarbon degradation and directional activation mechanism and parameters of the components; and (3) establishing a microbial reaction kinetic equation of the oil reservoir by combining microbial reaction kinetic components of the oil reservoir hydrocarbon degradation and directional activation mechanism. In a specific embodiment of the invention, the oil reservoir microbial ternary oil recovery system experiment is