The Distribution Characteristics Of High Permeability Strips And Interlayers In The Palegene-Cretaceous Period In Yaha 7-23 Wellblock Of Tarim Basin

Yaha condensate gas field is the largest condensate field which use high-pressure gas injection cycle way,the development of which lasted 11 years.By the influence of Gravity Override of injection of gas and high permeability stips,part of the production wells are shut due to the rapid rise in gas-oil ratio,with the increase of the gas migration weiis,the overall effect of gas injection decreased.The paper reviews the research status at home and abroad for the high permeability strips and interlayers,on the basis of fine gas reservoir description on the combination use of dynamic and static data,By the study of characterization and description of the distribution of high permeability strips within the reservoir,the target is to explore the mechanism of formation and distribution of high permeability strips,provideing an important basis for the preparation of the formation mechanism and the adjustment program.Taking YH7-23 Wellblock Palegene – Cretaceous sandstones for example,a comprehensive core,logging and three-dimensional seismic data Expand the study of interlayers and high permeability distribution.First,the sedimentary facies is determined by stratigraphic division and correlation,and the granularity attribute.Secondly,to obtain logging criterion interlayers by correlation analysis to give standard definition high permeability strip by cumulative frequency properties.On the basis of Prior research,Well and Seismic Data Combined determine the spatial distribution of permeability strip and interlayers.Finally,analysis the gas reservoir development impact of the high permeability strips and interlayers.