Optimization of acid pressure fracture parameters in carbonate reservoir
M oilfield is a large low-permeability carbonate reservoir with strong reservoir heterogeneity,and the reservoir space is mainly composed of karst caverns,solution pores and fractures.In order to ensure the economic benefits of oil exploitation,due to the lack of physical properties and storage capacity,as well as reservoir damage and other problems hin-der the efficient use of reservoirs,it is necessary to improve the technical scheme of carbon-ate reservoir improvement.In order to achieve the goal of stable production,we need to deeply study the corresponding methods of increasing production.Acidizing and fracturing is a key method to increase the production of carbonate reservoirs,which can effectively con-nect the flow path of oil and gas to the storage area.Productivity simulation is considered a key method for evaluating the effectiveness of acid fracturing and adjusting the parameters of acid fracturing.Based on the uniform formation linear model,the linear productivity formula is obtained.Then,according to the results of reservoir grading evaluation,the influence of acid pressure vertical well fracture parameters on the productivity of various types of reser-voirs is analyzed by numerical simulation software,so as to determine the optimal fracture length and flow conductivity of various types of reservoirs.
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