Fine Anatomy Of PI22 Single Layer Sand Body In 4 Block Of The Eastern Area Of Xing2 District

Xingbei Development Zone,located in the northern part of Xingshugang Oilfield,is adjacent to the Saltou Oilfield and has an area of approximately 130 Km~2.With the progress of tapped potential and increased production in the old oilfield,three times of encryption work has been completed,and the density of well network has been increased.With the in-depth of the development,the division of subdivision strata is not uniform,and the contradictions among stratums are becoming more and more prominent,which posed new challenges to the stable production and storage of oil fields.Therefore,it is necessary to carry out a detailed description of the main reservoir in the work area.The research of reservoir fine anatomy has developed rapidly in recent decades.It has been widely applied in major oil fields and has achieved good results.In particular,research techniques for meandering rivers have matured.The Pueraria oil layer group in the Xingshugang Oilfield mainly developed river-delta deposition,in which PI sandstone group mainly developed meandering river deposits.Therefore,the reservoir fine anatomy method can be used to solve the above-mentioned problems.This paper will take the PI22 of the Eastern 4 block of apricot area as the object to carry out the related research work.According to the existing well logging data,through the study of similar field outcrop and modern river sedimentation,referring to the domestic and foreign typical fluvial sedimentary research conclusions,and comparing with the results obtained from the empirical formula.Which be from point toline to surface,the four dimensions were unfolded and the PI22 single-layer sand body was finely dissected.The PI22 of Block 4 in the eastern part of Xingshugang District II has developed a high-curvature meandering river.The main sand body is edge beach,which connectivity of the internal sand body is mainly affected by the interlayer,so it is necessary to clarify its morphology and distribution rules.With this as a starting point,research has been carried out on related researches such as meandering river sedimentary model,single river scale,and point dam size.Based on the above studies,the four spatial combinations of a single channel are summarized.They are:channel-floodplain-side beach mode,river channel-side-beach mode,channel-overflow bank sand-side beach mode and side beach-side beach Patterns;identification of a single river identification mark is vertical with argillic,calcareous intercalation stage,the plane with height,sand thickness,rhythm differences and other demarcation;through statistical analysis of the data to determine the riverbank depth of the study area From 3.55 m to 3.90 m,choosing the appropriate empirical formula,we can infer that the width of the full bank of the channel is between 35 m and 44 m,and the width of the channel is between 270 m and 340 m.For the study of the internal structure of the point dam,we can know the level of the lateral mound.The width is between 24m and 37m.The dip angle of the side body may differ due to its location.The dip angle of the top and bottom positions of the side body is between 3°and 5°,and the central dip angle of the side body is larger than the top and bottom.Between 7°and10°.