Optimization Of Injection-production Parameters For Heavy Oil Horizontal Wells In CH10 Well Area Of ??CG Oilfield

The main research area in this article is CG oilfield CH10 wellblock Shawan group S1 ?1 and S1 ?2 small layer.This article mainly used numerical simulation method for the study on the mining of heavy oil with horizontal well steam stimulation.Based on understanding of the geological characteristics of CG field CH10 wellblock,the paper evaluated the development effect of S1?1 and S1?2.Geological model had been established and it had carried on numerical simulation for the single well.The paper analyzed the influence of injection-production parameters.Using orthogonal design method,the paper optimized the injection-production parameters to determine the reasonable injection-production parameters.In view of the different horizontal well,the injection-production parameters chart of different stratification was mapped.It can be used for future production and research.Using the injection-production parameters chart,the production characteristics of horizontal well were predicted in this paper.In this paper,achievements are as follows:?The effects of steam injection in CG oilfield CHI 0 wellblock Shawan group S1?1 and S1?2 small layer were evaluated.The steam injection effect of S1 ?2 was relatively better than that of S1 ?1.?Using the three-dimensional reservoir modeling technology,geological model and numerical simulation model of 6 wells were established.The paper used thermal recovery numerical simulation model for production history matching.The error of the cumulative oil production was less than 5%.It reached the fitting precision.?Using orthogonal design method,the paper optimized the injection-production parameters.This paper determined that the main factors that influence the effect of throughput were the intensity of steam injection,steam injection speed and liquid producing capacity.?The injection-production parameters chart of different stratification was mapped.Using the injection-production parameters chart,it determined reasonable injection-production parameters of the far away from the edge of bottom water wells,close to the edge of bottom water wells and bottom water thick reservoir well.?The study of the sensitivity of injection-production parameters indicated that improving the injection pressure of well head was good for heating crude oil.The smaller reservoir vertical permeability was,the better development effect was.Huff and puff development effect gradually got better as effective thickness increased.The farther the distance from bottom water,the horizontal well development effect was better.?Using the optimized injection-production parameters,development effects of three cycles of horizontal well were predicted.The average oil production of three cycles of three horizontal wells was 997.3t.