Water Flooding Potential Evaluation And Development Adjustment Strategy Research Of Streaky Heavy Oil Reservoir

Our country is rich in heavy oil reservoirs.When driven by water,the development effects of such reservoirs are poor because of high mobility ratio.Aiming to solve this problem,seepage law of such reservoirs is studied and reasonable development adjustment strategies are proposed in this paper.The methods can be referred to when other such fields are in development.Based on actual development characters of CHW-5 Block,numerical simulation and reservoir engineering theories are adapted in this paper.In view of research object,several aspects are dealt with as follows.(1)Mathematical methods such as fuzzy evaluation and grey correlation are used to justify effects of geological and operational parameters on development effects.(2)Combined with seepage characteristics of heavy oil reservoirs,velocity and pressure distribution with regard to starting pressure gradient are presented to calculate the plane sweep efficiency and designate well spacing and boundary of differential pressure.(3)Real numerical model of CHW-5 is set up to decide saturation distribution of this block.Integral potential evaluation of several parameters is taken into account and predominant potential zones are confirmed.(4)Typical numerical model of CHW-5 is built as well to decide optimal combination of operational parameters such as well pattern,well spacing,injection-production ratio and so on,and the most reasonable strategies are determined to fully develop the block.This paper provides numerical simulation model,confirms limitations and deployment strategies of well patterns of Block CHW-5 and lays foundation for the development of such reservoirs.