Study On The Reservoir Characteristics In Lower Bench Of Kalpintag Fomation Of Silurian System In Shun9Well Area

Silurian System is an important oil-gas exploration aim and futher explorationformation in Tarim Basin,and recently there have been an remarkable break in oil-gasexploration.The oil-gas have been showed in lower bench of Silurian Kalpintake Fmin Shun9well area of Tokole Low Uplift,and Shun9Well produces Low yield oil andgas flow.This shows a future of million tons of reserves in Tokole Low Uplift in thearea of Clastic rock,,which means a new position of oil-gas increasing production maybe built.Observation and description based on the core, the research area geology,seismic, drilling, logging, logging and testing data, the integrated use ofmultidisciplinary theories, methods and techniques, reservoir subdivision andcorrelation, sedimentary microfacies, sand body distribution, reservoir characteristics,the favorable reservoir systems,belt distribution and so on in lower bench of SilurianKalpintake Fm of the Shun9well area, clear layer fine division standard.; This aiticlehas been studied on the sedimentary systems and sedimentary system types,explorated low permeability reservoir evaluation method; data combining reservoitrap characteristics, production, research on reservoir types and characteristics,analysis the oil-water relationships and make the prediction of favorable oil-gas areas.Research shows that, in the study area the lower bench of Kalpintake Fm can bedivided into three lithologic section, respectively, under sub section of mudstone,sandstone, sandstone sub section of sub section. The sandstone sub section containingsand rock, is the main objective layer, further sandstone sub section is divided intoS1K1-3-4, S1K1-3-3, S1K1-3-2, S1K1-3-1four small layer.The type of sedimentary system is the broad epicontinental sea subtidal transitionbelt of sedimentary system, sedimentary microfacies can be divided into tidal channel,tidal sand bar, sand mud flat, shelf, shelf mud, sand storm six types.In this paper, the effective thickness, pore throat radius, pore radius, percentageof mobile fluid, displacement pressure, porosity, permeability, as the low permeabilityreservoir evaluation index system, evaluats the servoir synthesis. The reservoir type is mainly lithologic reservoir and lithologic structuralreservoirs, which is not communicated, a reservoir, but by the sand body distributionand structure control causes multiple lithologic similar structural composite reservoir,developing multiple oil-water systems,and oil-water interface is not unified.