Evaluation Of Production Capacity And Optimization Of Injection And Production Of Fractured Horizontal Seam In Wild Boar Special Low Permeability Reservoir

The wild swine bock block is a typical low-permeability,fracturing horizontal fracture waterflooding reservoir.Therefore,it is very important to study the seepage mechanism,productivity evaluation,and optimization of waterflooding parameters for fracturing horizontal fractures.The research block began its comprehensive water injection development in January 2004.As of now,the average daily production is 0.4m~3/d,the average moisture content is 60%,and the production capacity is not good.For the above problems,based on summarizing and analyzing the existing experiences of fracturing horizontal joint water injection development at home and abroad,this paper has studied the geological development characteristics of the wild swine bunting block,which is to study the productivity evaluation and water injection parameter optimization of the wild swine bock block.Based on the study of the two-phase seepage mechanism of waterflooding for fracturing horizontal fractures and the characteristics of waterflooding development,the effects of fracture half-length on productivity,water content,and the degree of production are analyzed;the characteristics and characteristics of waterflooding development in the wild boar land are analyzed.Single-well production dynamics in the area;a layer-by-line injection-water development capacity equation considering the starting pressure gradient and pressure-sensitive fracturing horizontal joints,and a multi-slot water injection development capacity equation with fracturing horizontal joints taking into account inter-channel interference.In the study area,a fine geological model was established and the water injection parameters of the wild swine trial area were optimized according to the actual production system at the site.Through the study of this paper,it is found that for fracturing horizontal joint waterflooding development,regardless of whether the fracturing scale is too large or too small,it will have a poor influence on the production capacity.If the fracturing is too large,ie,the crack is half-length or too long,it will lead to the production well seeing water prematurely and the occurrence of blister;the scale of the fracturing is too small,that is,the half length of the fracture is too small,which will result in excessive flooding between injection wells.,resulting in poor productivity.In a reservoir with a reservoir thickness of10m,the production capacity of a single well with two layers of seams is clearly larger than the single well capacity with one layer of seams,but the single well productivity with a layer of three seams is not much different.The poor production capacity of the wild swine bock is due to the poor water injection parameters.The main performance is that the current water injection pressure and water injection volume are generally low.