The Identification And Evaluation Of Excellent Source Rockin Tanan Sag And Nanbeir Sag

Shan2 and He8 members of the east III block of Sulige gas field belong to new gas exploration areas,but research area facing much problems such as the gas layer thickness,containing gas level differences,lateral variations largerly, relationship between gas and water is complex, the water point spread, study degree is still very weakly, need urgently to strengthen microfacies,the microcharacteristics of reservoir and clarify sand body distribution law, determine favorable facies in the study area.on the basis of contrasts with the neighborhood,this paper application combination method of macro and micro, regional data and combines individual well data,geological research and logging research,this research project carried out stratigraphic division and provenance comparative analysis,sedimentary facies and depositional system analysis, analysis of the advantages of sand, diagenetic reservoir facies.upper paleozoic stratigraphic division scheme is determined and establishment of regional sequence stratigraphic correlation framework on the basis of stratigraphic division and correlation of the fine By analyzing logs and drilling core observation, the provenance of the East III Block of Sulige Gas Field made of Yinshan Central, Grand Castle and the Urals;Depositional environments are Belong to the delta plain facies and delta front Interchange of river delta depositional system, the main purpose of sands development in the delta plain distributary channel and delta front underwater distributary channel;rock types Has characteristics of the coarse lithic quartz sandstone, lithic sandstone and quartz sandstone which is Slightly round and sorting good,The main constructive diagenesis is dissolution and the main destructive diagenesis is compaction. unstable phase residual component corrosion hole residual intergranular pore phase of major expansion of diagenetic facies types, which are subject to lithic quartz sandstone and quartz sandstone control;thick sand, sedimentary facies, advantages and diagenetic facies sand together determine the reservoir scale and development of space favorable facies;clarifies the sedimentary facies and diagenesis of hydrocarbon accumulationn.