Device for simulating non-homogeneity of rock by using checkerboard simulation body and manufacturing method

Abstract

The invention provides a device for simulating non-homogeneity of a rock by using a checkerboard simulation body and a manufacturing method. The invention mainly aims at achieving accurate simulationof the non-homogeneity of a rock plane in a laboratory. The device is characterized by comprising an ISCO constant pressure pump, an electronic pressure meter, a five-way valve, a guide pipe, different permeability units of 2*2*10 cm, a pouring heterogeneous simulation body and a measuring cylinder. The manufacture of the device depends on the permeability distribution of the actual rock. The manufacturing method comprises the steps that firstly, the permeability data of all layers of all wells in a to-be-simulated area are collected, and then the permeability data are subjected to dispersionthrough a variation function, so that the permeability value of any point on the plane is obtained; in this way, the plane non-homogeneity of the rock can be fully reflected in the simulation body, sothat simulation of the non-homogeneity of the rock plane in the laboratory is simulated, and the influence of the non-homogeneity of the plane on the development of the oil reservoir can be more conveniently researched.

Description

technical field [0001] The invention relates to a simulation body device used for simulating rock heterogeneity in oil displacement experiments. Background technique [0002] my country's oil fields are mainly composed of continental clastic rock reservoirs, the geological conditions are relatively complex, the heterogeneity is strong, and the properties of crude oil are relatively different, so the recovery efficiency is relatively low. Therefore, it is necessary to conduct a comprehensive study on heterogeneity. Due to the influence of sedimentation, diagenesis and tectonics during the formation process of the reservoir, the spatial distribution and various internal properties of the reservoir are changed. At present, the research on the heterogeneity of the reservoir is mainly an experimental method, but this The method is only to simulate the heterogeneity of the reservoir by simple parallel connection of cores with different permeability. Due to the limited experiment...

AI Technical Summary

Problems solved by technology

Since the reservoir is affected by sedimentation, diagenesis and tectonics during the formation process, its spatial distribution and various internal attributes are changed. At present, the research on the heterogeneity of the reservoir is mainly an experimental method, but this The method is only to simulate the heterogeneity of the reservoir by simple parallel connection of different permeability cores

Due to the limited experimental conditions, the number of parallel cores cannot be too many. At the same time, the permeability value of each core is made by using the average value of the permeability of a certain research block, which is different from the actual reservoir heterogeneity. The qualitative gap is large, and the reservoir cannot be simulated well, which leads to the results of the laboratory oil displacement experiment sometimes not being able to guide the field development well

Images