Study On Sedimentary System Of The EK₂⁴Group In Cangdong-the Nanpi Sag

Cangdong-Nanpi depression located south of Huanghua Depression, isKongdian as the main composite oil and gas source rock and reservoir areas. Earlybreaking of the Kongdian evolution of the Cenozoic basins of the HuanghuaDepression, through the Kongdian Cangdong-Nanpi depression sedimentary basindepositional system type and spatial distribution analysis, we have established thesedimentary filling of holes, Ek42. Production practices, Cangdong-Nanpidepression is low degree of exploration of the oil region, proven oil and gas resourcesis not high areas, but early research work there are imperfections and differences indepositional systems. There are imperfections and differences in terms of depositionalsystems.Commence this thesis topics based on the above objectives, select the DagangCangdong-Nanpi depression as the scope of the study, to the Paleogene KongdianKong, Ek42pay sets, the application of sedimentology and sequence stratigraphy,continental theoryfurther refined and systematic study of its deposition phase,sedimentary subfacies sedimentary micro equal characteristics combined with thechronostratigraphic framework, revealing the spatial distribution pattern of thedeposition system.On the basis of the analysis phase flag use the drilling cores, logging, seismicand indoor test data identifide the delta, turbidite fan, lakestype of depositionalsystem by the characteristics of rock assemblages, sedimentary structures and theprofile structure. Finaly,established the typical phase sequence of each sedimentaryfacies.Depositional system built based on sedimentology and contrast within theisochronous stratigraphic units. Single drilling in a wide range of efficient conversionof drilling and seismic profiles in the two-dimensional information, prepared on thebasis of the deposition system, the spatial layout of each sequence. On the basis of the above analysis, comfirm the relationship between the typesof the edge of the basin and the depositional system then analyse the filling pattern ofthe steep slope type basin margin.