Studies On The Oil-sand Distribution Of No.1Techtonics In Yingdong Oilfield

The No.1techtonics of Yingdong oilfield, a newly found oilfield in2010, is ananticlinal oil-gas field with many faults. It is featured with shallow buried oil anduneven distribution both horizontally and vertically. The reserve and productionincrease were heavily affected by the complicated faults, low drilling efficiency andwell deployment optimization. To maximum economic benefit of oilfield developmentin stratum scientifically and rationally, oil sands fine interpretation and distributionshould be figured out.The standard for reservoir division, location of key beds and the numbers of oilformation were distinguished by fine interpretation of stratigrahpic correlation based onthe former studies, drilling&logging information and well test data. Sedimentary faciesand gradients of remark wells were analyzed for restoring the sedimentary environmentand microfacies and establishing the transferring relationship between logging well andsedimentary facies. The studies shows that the sedimentary facies of upper Youshashanformation is a delta front of braided river，and most of them are underwater diversionchannel. The lower Youshashan formation develops delta front and shallow lake mixedwith beach bar. Parameter models and four logging property models were built foridentifying the reservoir lithology, properties, oil-bearing features and electric features.Based on the above research, the sand bodies and oils sands were studied in this thesis,including favorable sands distribution and primary controlling factors of oil sands,which provide theoretical foundation for the next stage of petroleum development instratum.