Distribution Regularity And Controlling Factors For Reservoirs Of Putaohua Oil Layer In Tai9Area

Putaohua oil layer is the main developing target layer in Songliao basin of Tai9area. Inorder to enlarge exploration scales and to deepen the understanding of the oil reservoir intarget block, we must ascertain the oil reservoir characteristics, reservoir distribution andcontrolling factors of reservoir.This paper focuses on this and based on the research data of the heortology, logging,geophysical and well-logging.It analysises the regional tectonic、the fracture characteristics、the stratigraphic features、the phase deposition and the reservoir-cap portfolio of Putaohua inTai9of Daqing station in Songliao Basin area, which are the based geological conditions,multi-faceted reservoir anatomy is studied,and summar the reservoir distribution and the mainfactors of the oil and gas accumulation of Putaohua oil area in Tai9region in details.Finally,combine the results of the above analys is to establish the model of oil reservoirs of thevarious parts of Tai9area;choose the favorable targets of Tai9region Putaohua oil layerPutaohua oil layer mainly forms fault screened hydrocarbon reservoir、fault screenedhydrocarbon reservoir and fault block oil reservoir three categories;tectonic and lithologycontrol reservoir distribution together,the eastern region is inherited low area,the influence ofthe tectonic reverse is very small,but the influence of the tectonic reverse in the central andwestern is bag,there are a large number of oil and gas in the eastern region of researcharea,but central and western are not. Summarizes the four main controlling factors ofPutaohua oil layer,they are oil source faults nearby high amount of sand area controlsreservoir, the structural highs in effective traps, Sand thickness and fault-sand matchingcontrols categories.Comprehensive the above research results, we got that the resource of the Putaohuareservoiring is the Qing1member. After arriving the layers of Yao2and Yao3members withthe migration pathway of clay stone faults， the reservoiring finally developed under thecapping formation of Nenjiang groups. The control of oil source fracture, sand body andpositve structure are standard of favorable area selection, in order to determine the16favorable targets of Tai9region Putaohua oil layer,provides a solid foundation of next largeinvestment of Tai9region.