Reservoir Characteristics And High Quality Reservoirs Prediction Of Jurassic Non-main Reservoirs In Lunnan Oil Field,Tarim Basin

Jurassic non-main reservoirs in Lunnan Oil Field is a lithology petroleum reservoir,logging characteristic is obviously different from adjacent horizon.The variation of vertical and lateral reservoir physical property is relatively clear,at the same time,the reservoir heterogeneity is strong.There are few researches about the study area.Longitudinal sequence and sedimentary facies division are not precise enough and the lateral change of the reservoir characteristics is not clear yet so it is easy to overlook the existence of high quality reservoir.Horizontal microfacies distribution is not predicted in the area and there is no systemic study on reservoir quality as well as its influence,the plane and vertical distribution of high quality reservoir is unclear.It can not meet the production needs of late development as the standby potential zone.In this study,fine reservoir description of the bioclastic limestone formation in the development stage is systematic studied.The frames of high resolution sequence stratigraphic and sedimentary microfacies were constructed.A template of various types of sedimentary microfacies was built.At the same time,the difference of quality of the reservoir is studied systematic and evaluated reservoir on the lithology,physical property,pore throat characteristics,reservoir space types,epigenetic diagenesis.it analysed the diagenetic evolution of non-main reservoirs and the mechanism of the formation of high quality reservoir.Finally,based on lithology,physical property pore throat characteristics and epigenetic diagenesis,the article develop reservoir evaluation criteria for study area,and combined with dynamic feature,potential evaluation of development for study area was formulated.