The Study Of Remaining Oil Distribution And Development Adjustment In J,District N1

The J reservoir in N1 area consists of three layers,J1,J2 and J3.At present,the development layer is J2.After many years of development,it has entered the middle-late period of development.The development effect is getting worse.How to further improve oil recovery has become an problem.There are only 25 wells produced in J1 layer,and The average oil recovery is 2156.6t,so it has the potential to develop.In order to improve thel development effect of J reservoir,the study analyzed the development characteristics and production rules based on the dynamic analysis of reservoir.The factors affecting the development effect such as injection and production parameters are analyzed,and the main contradiction affecting development is found.Combined with the characteristics of remaining oil distribution,development adjustment plan is formulated.Fine reservoir geology model and 3d geological model are established in this paper,which is the base of correct researches on the distribution of remaining oil.The oil reservoir engineering method is used to analyze the current production dynamics of reservoir and evaluate the effect of steam stimulation and steam flooding.Based on the numerical simulation results of reservoir,the distribution of residual oil in plane and longitudinal is analyzed.Combined with the distribution of remaining oil,we put forward some measures,such as improving steam flooding well pattern,optimizing injection production parameters,intermittent steam drive,improving perforation technology,channeling and sealing profile control,and giving specific parameter boundaries.The main results: 1)Combined with the research results of fine geology,the numerical geological model of the target reservoir is set up,which can better reflect the characteristics of the reservoir.2)The remaining oil is mainly distributed in three regions,the main body parts with large original reserves,poor efficiency in a steam drive and some layers which are not well used.After that,the three remaining oil should be the main adjustment object.3)For the J2 layer,it is recommended that intermittent steam injection should be carried out,meanwhile,the steam injection at the bottom of the well should be maintained,and the well group should be channeling.4)The development mode of J1 layer is selected by huff and puff and steam drive,and the final recovery can reach 46.4%.