Research On The Sequence Stratigraphic Framework Of Denglouku Group-members2of The Quantou In The Yingshan-miaotaizi Area

Guided by the theories of sequence stratigraphy,sedimentology,petroleum geologytheory,using seismic data,well logging,cores information in the the the Yingshan-Miaotaiziarea Denglouku Group-Members2of the Quantou,research and analysis on the sequencestratigraphic framework,sedimentary facies,reservoir structural traps in the study area havebeen carried out in the paper.Integrated application of sequence stratigraphy principles, combined with the seismiccharacteristics of unconformity and logging curves,variations on the core,based oncomparison between principles,the sequence stratigraphic framework is established. Researcharea has been recognized out7sequence boundaries,bottom up respectively:the bottom of theDenglouku group(SB1),the bottom of the second member of the Denglouku group(SB2), thebottom of the third member of the Denglouku group(SB3),the bottom of the fourth member ofthe Denglouku group(SB4),the bottom of the Quantou group(SB5),the bottom of the secondmember of the Quantou group (SB6),the top of the second member of the Quantougroup(SB7).SB1,SB5and SB7are the boundaries of the boundaries of the super-sequence.Each sequence can be diveded into system domain.By analyzing the stratum thickness map and T0map,the formation thickness distributioncharacteristics are analyzed,and the sequence interface structural characteristics arestudied.The types of traps include anticline,faulted anticlines and faulted block trap in thestudy area.Through the analysis of single well phases and multi-well phases,the study area isidentified to5kinds of facies,22kinds of subphase,38species of micro-phase;in addition forthe characteristic of the study area, the7three-level sequence of sedimentary microfaciesdiagram of Denglouku Group-Members2of the Quantou have been described out,depositional evolution sequence of Denglouku Group-Members2of the Quantou have beensummed up.According to the source-reservoir-cap combination,Denglouku Group-Members2of theQuantou formation is divided into three sets of reservoir-cap,the paper analyzes the favorableexploration areas in this area.