Study On Sedimentary Characteristic In Yumin Area

Yumin area is in Zhaoyuan Coutry of Heilongjiang Province,and located in Songliao basin second-order tectonic units Chaoyanggou terrace and Changchunling anticlinal belt.With the successive development of located in tectonic advantageous position and sand more development block,in order to meet the needs of development and reserve evaluation,as a potential blok,we are urgently needed to conduct oil geologic integrated research in Yumin areas.In order to guide the next exploration and development,we established the sequence framework and divided Fuyu oil layer into 2 long cycles,6 medium cycles and 17 short cycles in this area which is based on the study of the forest assets management,used high-resolution sequence stratigraphy as the theoretical guidance,and combined the theoretical knowledge of sedimentology and logging,on the basis of the study we conducted the substratum division and correlation to all exploration wells, evaluation wells and development wells.It is developed delta plain facies in Fuyu oil layer of Yumin areas,first of all,we established well logging facies in this area which is based on core descriptions and comprehensive research of logging data,based on the study we conducted the analysis of single well facies,multi-well facies and the combination of plane facies to the study area,then we draw the fine sedimentary facies map to all small layers with the combination of seismic attribute and seismic facies,finally we described the sedimentary characteristics and the law of vicissitude. In this paper,by used the research of core obeservation,thin section,blue epoxy resin-inpregnated tuhin section and other related documents, we holds that it experienced mechanical compaction, cementation, dissolution in this area, Mechanical compaction, cementation are destructive diagenesis,which is the dominant factor for the worse of the deep clastic play reservoir property; and mereorological water filter,erosion and other constructive diagenesis,which can promot the development of the secondary porosity and the property of resvoir.