Detailed Reservoir Description And Remaining Oil Potential Tapping Study Of T83 Block In Wanglongzhuang Oilfield

In recent years,low permeability reservoirs have great potential in newly added proved reserves in China.T83 block in Wang Long Zhuang oilfield has been developed for more than 20 years.At present,it is in the high water cut stage.Due to the complexity of the deposit,the reservoir and the stage of understanding,the water flooded degree of the main oil layer is high,the remaining oil is unclear,and the adjustment of the development is not perfect.lt is mainly manifested in plane and vertical contradiction,and the effect of partial injection is poor,and the effect of oil well is not balanced.In view of the above problems,we need to further study T83 block,solve the contradiction in actual production and improve the reservoir recovery.This study mainly from the perspective of detailed reservoir description and remaining oil exploitation,mainly including sequence stratigraphy,sedimentary microfacies research,reservoir comprehensive evaluation,three dimensional geological modeling,reservoir numerical simulation,analysis of remaining oil distribution characteristics,and the adjustment of potential countermeasures.In order to lay a solid foundation for the next step of exploitation of T83 block.According to the log response of T83 block form,combined with the maximum entropy spectrum analysis technology,the target layer ? section is divided into two small layer,? section is divided into six small layers in study area and established the high-resolution sequence stratigraphic framework,earried out the small layers of typical wells comparison.Based on the core photos,sedimentary facies markers and single well facies analysis of the T83 block,the study shows that the 2nd of the Funing formaiotn is mainly developed beach and dam facies,and the microfacies are the sand beach,sand dam and the source of the sediment mainly comes from the Zhangbaling bulges in the west.By means of geological statistical analysis,the heterogeneity of reservoir is characterized by coefficient of variation,coefficient of progression and gradation.The study shows that the heterogeneity of the 2nd of the Funing formaiotn is more serious.The development characteristics of fractures in the study area are analyzed.It is found that the main development direction of fractures in the study area is north-east direction.After fitting the water driving history of T83 block in Wanglongzhuang oilfield,the distribution characteristics of remaining oil are analyzed,and the measures to dig the remaining oil are put forward,and the potential effect of the remaining oil is evaluated.