Reservoir Evaluation And Prediction For Favorableareas About Zhangjuhe Area

Zhangjuhe area is located south of qikou oil source depression,but because thereservoir is poor, resulting in production of unstable and oil production is not high,and the study area has experienced40years of exploration and development, with theoil source depression of qikou’s exploration and development processes have becomemore sophisticated, more and more difficult to develop this area. But Zhangjuhe areahave good reservoir conditions, such as rich source of oil, sand and tomographic aslohave more.so in this article will research from tectonic characteristic,reservoircharacteristic and enrichment rules of oil and gas,it will conducive to further thisarea’s exploration and development,made the following results.(1)Utilization of logging data on the advantages of high-resolution on thelongitudinal and transverse advantage of of seismic data, seismic and well logginghave combined to divide layers. After repeated comparison study,used Zhang7and Qi129as the standard wells, with a combination of RT,AC and SP to do the division andcorrelation of the stratigraphic, finishing the45wells to divide small layers.(2)Research area have developed of a north-east of Zhangbei strike-slip faults and alot of nearly east-west of panicle secondary faults, overall deeper shallow faults havedevelopment, the sedimention and tectonism have controlled by Zhangbei fault andZhangdong fault，aslo controlled the distribution of traps in the area,and most of trapsare fault-noses’traps.(3)Through detailed observation and description of regional sedimentaryenvironments and17coring wells,and analysis of the granularity data,come to thatwork area have delta-lake depositional system,developmental fan delta, meanderingriver delta and lacustrine facies.(4) Affected by provenance and tectonic, underwater distributary channel,mouth barand sheet sand microfacies was the based microfacies of sedimentation period inshahejie group, and mainly developed in the south and the middle of the study area.Affected by the northwest provenance to enhance, underwater distributarychannel,mouth bar and sheet sand microfacies was mainly developed in thenorthwestern of the study area in the sedimentation period of dongying group.(5) Block reservoir was the main reservoir in zhangjuhe area,and have rich ofhydrocarbon source,cap rock, trap development was conducived to petroleumentrepment. Faults, sand,volcanic rocks and fractures in dolomite was the Conducting system,and the main channel vertical migration of oil and gas was the faults,the mainflat lateral migration channel was the sand, faults was the main controlling factors inthe region.(6) According to the tectonic, sedimentary, oil and gas and the other factors,we candivide into six groups of Dongying group, divide into seven group of Shahejie groupin the study area, and used gray correlation analysis for each block to be queuedpreferred, preferred a more favorable area block.