Study On The Relationship Between Sequence Stratigraphic Characteristics And Oil-Gas Distribution In Sudeerte Oil Field Of Hailaer Basin

Hailaer basin,which is located in the territory of Hulunbeier league of neimenggu autonomous region, is a meso-cenozoic terrestrial rifted basin, Deerbugan rupture is the boundary for basement of Hailaer basin,The eastern basion belongs to neimeng-daxing'anling ford system of Tianshan-Xing'an's early hercynian forded region,and the western basion belongs to Eergu'na block of Siberia plate, towards ne-trending. This thesis takes reservoir geology,logging geology,sedimentology theory as its instrument,by adopting experimental analysis in combination with comprehensive geological analysis.It focus on fine reservoir correlation and reservoir sedimentary features of Xing'anling group of Suderte Area.According to core data,logging well data, logging data, by using high resolution sequence stratigraphy ,third-order sequence and four-order sequence division and correlation has established, 3 unconformity and 11 sedimentary transformation surface have been identified,which are divided into 3 third-order sequence and 13 four-order sequence,from bottom to top,named SQ0,SQ1,……,SQ11,SQ12. the corresponding relation between sequence and oil group have established,and also have established sequence stratigraphic framework,under the constraint of four-order isochronous stratigraphic framework,we divided I,II oil group of the main oil bearing series into 26 layers,including 1 to 10 layers of I oil group,11 to 26 layers of II oil group.Within sequence framework,we summarize the spreading and evolution characteristics of four-order sequence and sand body with hydrocarbon distribution.before the deposition of SQ0-SQ1(Tongbomiao group),the whole area sufferd denudation planation,only SQ0-SQ1 formation in west bei 28 area -bei 14 area preserved. Before the deposition of SQ2,all Sudeerte area was under erosion.SQ2 only deposided in some wells,after that, Sudeerte continued subsiding,received more complete SQ3-SQ5 deposition, at the end of SQ5 deposition period, some SQ5 sequence and SQ4 droped semi-cycle were eroded,but bei 16 area was in thrown side,SQ5-SQ6 grew completely.during SQ7-SQ12 deposition period, the whole Sudeerte area accepted deposition, SQ7-SQ12 had a complete sedimentary cycle. Focus on layer division and contrast of I,II oil group in this area.The identification of sand body is mainly according to core and experimental analysis,combiled with well logging characteristics.On the basis of which, sand body thickness has been obtained then,and analyze spreading characteristics of sand body,also,we divide and correlate reservoir profile of oil bearing layers of I,II oil group. Reservoir identification is by the analysis of logging interpretation and oil-mining test,on this basis,we conclude the thickess and deep of oil bearing layers of every layer.then by using logging interpretation and oil-mining test, we continue to correlate oil layer among other wells,so we can confirm reservoir planar distribution,by combiling sand body thickness graph,we can extent reservoir planar distribution,to determine reservoir planar distribution characteristics.