The Sedimentary Facies Features And Favorablereservoirs Analysis Of Kongdian Formation To Shahejie Formation In Yeshanbo Area Of Huanghua Depression

the main body of Yeshanbo oil field in Nanpi country of Duanliubo township,regional tectonic position is located in the south in huanghua depression of surging east skirt structural belt of female temple south, broken nose exploration area of 123km2. The region north and east respectively and female temple, period of six dial into the field, south south skin sag, west for cangxian uplift, fault through the hole in the northeast neusoft is connected with a surname the chariot oilfield, tectonic location is quite good. Confirmed by many years of exploration and exploitation of its abundant oil and gas resources, accumulation condition is superior, the drilling hole store group- multiple development in shahejie oil-bearing series. So far the stores group, shahejie formation in the hole this proven oil geological reserves of 1211.5 x 104 t,recoverable reserves of 208.3 x 104 t, 1120 x 104 t, with the reserve account for92.45% of the proven oil reserves, has the potential for further evaluation.When the need to increase production and to improve the reservoir further undermining of the technology, the study area into high containing water flooding development stage, at the same time facing the following problems, one is the study of regional development more fault, had a greater influence on the controlling factors for reservoir, the second is the oil-bearing series in the area is more, due to the fault control factors and factors of deep buried depth and produce many latent reservoir and fault block oil reservoir, the third is the zone lithology diversity development, from the hole store group to shahejie development of various lithology, the rock facies sedimentary facies evolution is multifarious, but rock and hydrocarbon generation and reservoir effective thickness is larger, wide distribution, has the very good development prospects. Four basic geological research degree is low, in the previous lack of detailed divide sequence stratigraphy and sedimentary system domain division。According to the statistical results of predecessors’ information, current research leaves three dial the rich zone of seismic data is complete, and covers the whole study area of about 309 km2, study area location number 150 or so, the exploratory well about forty. The infield development well, well control, logging data and lithologic data is full, the external exploratory well is more, information is neat. A total of 30 mouth, drilling and coring well coring total penetration of 977.21 m, total length of905.98 m cores, the total yield of 92.7%. Before this,(yan-wei li, 2013) 2 of the holes in the studied area has done the research of sedimentary facies,(2013) Ma Shaoyan,comprehensive evaluation in study area had favorable traps, but limited to develop small layers compared with the model.This paper using the formation stratigraphy, seismic stratigraphy, sedimentary petrology and lithofacies palaeogeographic basic theoretical guidance, through seismic time section(seismic section) response characteristics, geological lithology information and optimizing well logging data, on the basis of corresponding control of layer division, combined with the development of geological layer contrast principle and sequence stratigraphic classification standard, distinguishing and divided the study area and high precision of small layer contrast- sequence stratigraphy interface.Will bottom-up divided into a super long hole store group( Ⅱ) cycle(SSC1), 4( Ⅲlevel) for a long time cycle(LSC1- LSC4), 12( Ⅳ) mid cycle(MSC1- MSC12),shahejie bottom-up divided into a super long( Ⅱ) cycle(SSC2), 3( Ⅲ) cycle for a long time(LSC5- LSC7), 8 middle( Ⅳ) cycle(MSC13- MSC20), and the corresponding level system domain.And in the study area based on the study of the sequence stratigraphy and sedimentary environment, establish the hole leaves three dial area group- shahejie formation of level IV sequence stratigraphic framework. Within the sequence framework, based on lithology data, in combination with characteristics of log response characteristics and seismic response analysis of the data, single well facies marks, to establish a clear single well sedimentary microfacies types. And draw the relative than even well stratigraphic and sedimentary micro section and thickness of sand body contour plan[1], sand ground floor plan than the contour map and the sedimentary microfacies, within the sequence stratigraphic framework level IV calibration and describes the characteristics of the distribution of single sand body and sedimentary environment evolution characteristicsUnder control at the same time analysis of sequence stratigraphy and sedimentary facies distribution of effective reservoir lithology, for further development and production in the study area provide basic geological technical support.