A Numerical Simulation Method for Microbial Flooding

Abstract

The invention discloses a microorganism oil displacement numerical simulation method. According to the method, the complicated microbial enhanced oil recovery mechanism is summed up as follows: reducing viscosity of crude oil, changing rock permeability and surface wettability, and changing oil-water relative flow ability and residual oil saturation; adopting experimental and mathematical methods to establish quantitative relation between oil displacement parameters and microorganism parameters; achieving microorganism oil displacement numerical simulated calculation through data real-time exchange between a biofield parameter calculation module and an oil pool numerical simulation device, designing a microorganism oil displacement scheme and predicting a microorganism oil displacement effect quickly and efficiently, and meeting the requirement for engineering design of oilfield development. The simulation method fully reflects the microbial enhanced oil recovery mechanism, ensures the truth of a microorganism oil displacement process, reduces complexity of the microorganism oil displacement process and significantly improves efficiency of microorganism oil displacement numerical simulation.

Description

【Technical field】 [0001] The invention relates to the technical field of microbial oil recovery, in particular to a numerical simulation method for microbial oil displacement. 【Background technique】 [0002] In recent years, microbial oil recovery technology has attracted widespread attention at home and abroad due to its advantages such as wide source, strong adaptability, low cost, convenient on-site operation, no damage to formation, and environmental protection. Microbial oil recovery technology mainly injects microorganisms and their nutrient sources into the underground oil layer (or injects nutrient sources to activate the existing microorganisms in the reservoir), so that the microorganisms grow and metabolize in the oil layer. On the other hand, it is a technology to enhance oil recovery by using the gas, biological surface active substances, organic acids, polymers and other substances produced by the growth and metabolism of microorganisms in the oil reservoir. ...

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Problems solved by technology

[0022] The purpose of the present invention is to solve the problem that the existing technology cannot quickly and efficiently realize the numerical simulation of microbial oil displacement, and provide a numerical simulation method of microbial oil displacement, which can not only fully reflect the mechanism of microbial enhanced oil recovery, but also can quickly and efficiently Carry out numerical simulation of microbial flooding, carry out microbial flooding scheme design and microbial flooding effect prediction, to meet the needs of oilfield development engineering design

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