Fine Reservoir Description Of Jin 16 Xinglongtai Reservoir In Liaohe Oil Field

With the deepening of oilfield development,chemical flooding as a way to replace water injection,in recent years,domestic and international oil industry more and more attention to the chemical drive.However,the complexity of the reservoirs,especially the low-order faults in the reservoirs,and the heterogeneity of reservoirs directly affect the development effect of chemical flooding,which restricts the continuous improvement of oilfield development level.As a representative of Liaohe River water injection development,in recent years,Jinling 16 Xinglongtai reservoir chemical flooding field test has made a breakthrough,is the Liaohe Oilfield chemical drive one of the key blocks.The block belongs to the fan delta front sediments,and is affected by sediments.The Xinglongtai oil layer sandstones are superimposed on the horizontally superimposed sections,and are vertically overlapped with each other,which greatly increases the difficulty of lateral comparison and leads directly to the chemical flooding.And it is difficult to further improve the oilfield development effect by controlling the chemical flooding effect by reducing the range of chemical agent and controlling the effect of chemical flooding.In view of the above problems,this paper uses the pre-stack time migration 3D seismic data and the VSP test data collected by the whole area,and the following results are obtained for the fine reservoirs of Xinglongtai reservoir in Jin 16 block.(1)Based on the three-dimensional seismic data of the block-based pre-stack time migration,combined with the characteristics of three sets of regional stratigraphic contrast markings,the block formation is established by the combination of rock and earthquake.On this basis,Layer level fine comparison.(2)The fine tectonic study of the wellbore network is carried out to clarify the fracture characteristics and microstructural characteristics of the block.The accuracy of fault identification is reduced from the original 30 m to the accurate identification of 10-15 m,and the precision of the microstructure is improved to within 5m,which can meet the requirements of the current chemical driving to the geological body.(3)Through the core scale logging,to carry out the study of sedimentary microfacies.Based on the comparison of fine stratigraphy,the characteristics of the sedimentary microfacies logging are calibrated by the core,and the single-well sedimentary microfacies is studied to clarify the characteristics of block deposition.(4)The porosity and permeability of the reservoirs before and after the water injection were compared by comparing the core physical properties of the three core wells during the early stage of water injection,the middle of water injection and the later stage of water injection.In this paper,the geological problems of Xinglongtai reservoirs in Jinzhuang block are studied as the main starting point,and the fine reservoir description is carried out to improve the accuracy of reservoir research.It provides reliable geological basis for the expansion of chemical floodplain network in the region.Effect has a very important significance.At the same time,the research of this project provides a reference for the efficient development of chemical flooding in the same type.