The Study On Reservoir Description And Remaining Oil Distribution On The 4^th-6^th Sandstone Beds Of The Second Member In The Shahejie Formation Of The Tuo 28 Block In Shengtuo Oilfield

The 4^th-6^th sandstone beds in the second member of the Shahejie formation of the Tuo 28Block began to be developed in 1964.It has gone through the development period of elastic drive,water injection development,encryption well network expansion,subdivision of reservoir development period and high water cut development period.In the face of the current recovery degree is high,the single well controlled reserves in the area of small,difficult potentialities and the reality of the situation and deepen reservoir geology and oil and water distribution regularity of understanding,deepen reservoir geometry,superposition method,single sand layer the pore structure,fine sedimentary microfacies and reservoir heterogeneity research,fine description of reservoir of the three dimensional change,set up in the 3 d static geologic model and reservoir model.On the basis of predecessors research results,Geological,logging and reservoir dynamic and static data has been used to carry out the reservoir description on the 4^th-6^th sandstone beds of the second member in the Shahejie formation of the Tuo 28 Block.First of single sand layer division and contrast research,in a standard control layer,cooperate sign divided into sand layer group,through the"cycle of contrast,hierarchical control,dynamic verification,adjust the perfect"to divide the small layers compared;Second to carry out the blocks in different oil sands body level of micro structure and the distribution of internal low ordinal small fault blocks and closeness,and further analyze the micro structure and small fault blocks the effects of remaining oil distribution;On the research of sedimentary microfacies is the most can reflect the characteristics of sedimentary facies in the comprehensive collection of facies marks,on the basis of relies mainly on the well logging curve to conduct;And to study the reservoir heterogeneity of the are analyzed,finally the fine 3D geological model was built.It shows that the 4^th-6^thh sandstone beds were divided into 13 layers.Tectonic characteristics of the research area show the typical northeast is highter than southwest.The shape of the area like a dustpan opening to the west.The tiny structure types in the area have small structure,small pool structure small anticline has a certain control effect to the distribution of remaining oil.Delta plain channel deposit in the study area,it can be mainly divided into drainage line,piont bat,river border and group interval;The research shows that the heterogeneity of in-layer and the interlayer is strong,reflect the contradictory prominent;Finally based on the study of 3D geological model,for the final distribution of the remaining oil prediction to provide reliable geological basis.