Fine Reservoir Characterization And Favorable Reservoir Prediction On The Third Member Of Qingshankou Formation Of Qian'an Oilfield In Jilin District

Nowadays,with the more mature and clear development of low-porosity and lowpermeability reservoirs,the research heat of low-porosity and low-permeability reservoirs has increased and gradually become one of the focuses and hot spots of current research as a substitute of conventional high-porosity and permeability reservoirs.This paper takes the Songliao Basin as the research background,integrates core data,well logging data and other data,and uses discipline theory such as sedimentology and reservoir geology as guidance to develop low-porosity and low-permeability reservoirs in the research area which is the north of the old area of the Qian'an Oilfield.Also,researched and completed the research and creation of the dissertation.First of all,with the sequence stratigraphic theory as a guide,use the log curve data of the study area to identify the characteristics of different levels of datum surface cycles.After the comparison and analysis,Complete the fine division and comparison of stratigraphic framework in the study area.Based on the isochronous stratigraphic division and the previous studies,We clarify the sedimentary environment of the shallow water delta front of the study area,and then carry out the characterization and analysis of the sedimentary microfacies in the study area.By analyzing the cross and plane sedimentary microfacies distribution on the third member of the Qingshankou formation,we summarize four types of microfacies in the study area.Using coring well data to analyze the overall physical properties of the reservoir on the third member of the Qingshankou formation,and using the interpretation model of physical properties and oil-bearing property to complete the prediction of the physical properties and oily data of non-coring wells in the study area.Then according to the physical and oil data,the lower limit of effective thickness is determined,the effective thickness of the stratification is described,and we finally summarized the vertical development and planar distribution characteristics of the reservoir.Based on various previous studies,we explore the factors affecting reservoir quality,and formulate reservoir classification and evaluation standards.Using this standard to classify and evaluate reservoirs in the study area,we finally predict the high-quality reservoirs on the third member of the Qingshankou formation in the north of the old area of the Qian'an Oilfield.Through the study of sedimentary reservoir characteristics in the north of the old area of the Qian'an Oilfield,as well as the reservoir evaluation and high-quality reservoir prediction in the study area,we can deepen the understanding of the development characteristics of the oil and gas reservoir in Qian'an area,and have a certain guiding effect on the production in the study area.It can certain make sense in theoretical and practical significance for the subsequent exploration and development research in Qian'an area.