Research On Technology Of Steam Flooding And Gravity Drainage Development In Super Heavy Oil Reservoir Of Chunhui Oilfield

Chunhui oilfield is located in the western part of the northern margin of Bernhard construction zone in Junggar Basin,its main oil-bearing,From the analysis of drilling and logging data,there are three sets of one to two meters interlayer upper the part of the reservoir,and thin oil layer between interlayers,about 12 meters Continuous reservoir at the bottom of the interlayer.In order to solve the problem that SAGD can not be effectively applied to the reservoir,we need to impove the way of SAGD,to extend the applicable range of SAGD technology.According to the geological characteristics of chunhui oilfield,the thermal recovery simulation software CMG is used to set up single-well group model,first,research on the rule of the steam chamber formation and development is made;Secondly,sensitivity analysis of factors which have the impact on technology of steam flooding and gravity drainage development is made;Finally,in use of the orthogonal experiment design method to draw the main sequence of the factors that affect the development,preferably the optimal level combination,establishing the model of multiple well group to forecast development effect.According to the study of the steam chamber,the development process is divided into three phases,and the expansion of the case law of the steam chamber and fluid flow at different stages are described;according to the sensitivity analysis and orthogonal design,draw the main sequence of the factors that affect the development,preferably the best development approach,and the distance between the vertical wells and horizontal wells is the main factor;finally,development index prediction results show that the technology of steam flooding and gravity drainage development used in super heavy oil reservoir,Which contain interlayers,have a good effect.