The Study Of Putaohua Oil Layer's Oil-water Distribution Law In The Ancient 693 Of Gulong Sag

In this study,the PI reservoir in the ancient 693 block is taken as the main research object.The ancient 693 is located in maoxing syncline in Southern GuLong.The structure of the ancient 693 is located at the southern end of the Qijia Gulong sag in the central depression of northern Songliao Basin.Putaohua reservoir of the ancient 693 controls by Western and Northern depositional system,reservoir changes quickly,the relationship of oil and water complex.The oil-water layer at the high point and the oil layer at the low point of the structure is enormously difficult to the next step development department in some areas.This article,under the prerequisite to study materials of survey well,drilling,earthquak e and oil testing and so on,on the theoretical basis of petroleum geology,imentary petrograph and structural geology,using sedimentary microfacies analysis,hydrocarbon accumulation analysis,hydrocarbon migration analysis and oil-water distribution,definiting the rule of hydrocarbon accumulation and distribution rule and main controlling factors of oil-water distribution,can provide the important theoretical support and practice guidance for oil field exploration and development.Through research it is the following understanding:1.Identifying totally 4 sedimentary microfacies,among underwater distributary channel,main sheet sand,sheet sand and sub-sea distributary channel sand.2.The main types of lithologic reservoir,faults-lithologic reservoir and structural-lithologic hydrocarbon reservoir,a reservoir formation model of lower to upper lateral reservoir.3.Oil layer is mostly developed on the underwater distributary channel and main sheet sand with net thickness over 0.5 mete.Complex oil-water distribution was mainly controlled by lithologic and physical properties and also affected by structural feature and fault to some extent.