Study On The Front Edge Of Water Drive Based On Flat Plate Experiment

Low-permeability oil fields have great development value.In the current situation of tight supply of oil and gas resources,the development of low-permeability oil fields has become a problem that is generally valued worldwide.Low-permeability reservoirs are dominated by small,micro-porosity and fine and micro-throat channels.The characteristics of small pore throats and large specific surface area in reservoirs cause the fluid in the reservoir to have special seepage rules,making its water injection effect comparable to medium-high permeability reservoirs.There are obvious differences.The direction in which the injected water is advancing,the direction of the main water injection,and the location of the water injection front are all directly affecting the reservoir development effect.Full understanding of the remaining oil on the plane has also become an urgent problem to be solved in oilfield development.This article is divided into two parts: indoor physical model experiment and numerical simulation research,of which physical simulation is the main part.In this paper,a low-permeability reservoir is simulated by a physical flat-plate model experiment.The experiment includes two types of displacement pressure difference,two types of displacement well patterns,and the experimental study of waterflood fronts under three types of permeability.The waterflood front with different pressure difference,two displacement well patterns,and three permeability waterflood fronts with different injection PV changes.The numerical simulation part is based on Petrel software to simulate the formation,using CMG numerical simulation software to perform numerical simulation calculations,and studied the changes of the front edge of the water flooding under different PV injections to verify the correctness of the physical simulation experiment.The results of laboratory physical model experiments and numerical simulation analysis further clarified the movement law of the water drive front under the low-permeability reservoir,and proposed an empirical formula for the change of the water drive front position in the low-permeability reservoir with the injected PV number.The correlation between the position of the water drive front and the number of injected PVs in low permeability reservoirs and the changing law of the water drive front with different permeability intervals,displacement pressure difference,fracture angle and other factors provide a reliable technical theory for the field And suggestions.