Numerical Simulation Study Of Volcanic Rock High-viscosity Reservoir Development Strategy

In the development of oil and gas reservoirs,scholars at home and abroad mainly study the reservoirs related to sedimentation,but volcanic reservoirs have not been paid much attention because of their small reserves,poor oil and gas quality and great difficulty in development.With the rising demand for oil and gas resources,some unconventional oil and gas reservoirs and oil and gas resources have gradually received attention,and volcanic reservoirs are one of them.In this paper,the XX block is selected as the research block to study the development mode and mining characteristics of volcanic reservoirs.The XX block belongs to the fractured reservoir of volcanic rocks.The fracture is relatively developed and the heterogeneity is strong.The viscosity of the crude oil belongs to high viscous oil.After evaluating its natural energy,it is found that the volcanic rock is dense and the viscosity of the viscous oil is high,and the density is high,resulting in poor energy and dissolved gas flooding energy of the block.So it can not maintain high yield and stable production.In order to study the reasonable development mode and mining characteristics of the XX block,this paper uses the numerical simulation method to simulate the block.Firstly,the geological model of this area is established.This model was built using petrel software and the stochastic modeling method was used to establish the matrix attribute model and the fracture attribute model.Then the geological model was imported into the CMG numerical simulation software to match the production and historical data.After repeated modification of the relevant parameters,the model achieved high accuracy.After completing the modeling preparation for the research block,the research on the development mode of the block was started.After analyzing the feasibility of water injection in volcanic reservoirs,the simulation of water injection development in XX block was carried out,and the parameters of phase attention were optimized.Studies have shown that due to the high viscosity of crude oil in XX block and the influence of fracture development,water injection development has achieved certain effects but low recovery.After analyzing the influence of different viscosities on the development of water injection,it is concluded that the water injection development method has better recovery effect at lower viscosity,so water injection development can be adopted when the viscosity is low,and other mining methods should be adopted when the viscosity is high.So the paper then carried out the research on the steam injection thermal recovery of the block,and obtained the proportion of each oil recovery mechanism in the high-viscosity steam injection thermal recovery,and optimized the relevant parameters in the steam injection thermal recovery development,and finally got reasonable development strategies for high-viscosity reservoirs of volcanic rocks.