The Research Of Sedimentary Characteristics And The Geological Evaluation Of Oil And Gas Of Carboniferous Sand And Claystone In Lun Nan Sangtamu And Sangnan Area In Northern Tarim Basin

The thesis focus on carboniferous sand and mudstone of Kalashayi Formation in Lun Nan Sangtamu and Sangnan area in northern Tarim Basin.Under the guidance of principles and methods of advanced sequence stratigraphy,sedimentary petrology,reservoir geology and petroleum geology as well as previous findings.Analysis on macro and micro levels and the method of multiple stratigraphic division are used during the process.Based on detailed layer division and contrast,collection and description on previous findings and observation on core and rock slice indoor,and investigation on dynamic data covering logging,earthquake and production,Carboniferous sand and mudstone in Lun Nan area can be divided into three sublayers as S1,S2 and S3.Through the study on multiple stratigraphic division,petrological characteristics and sedimentary facies of 78 wells there,analysis on sedimentary facies and palaeogeography as ancient landform,Comparative analysis horizontal and vertical connected wells profile.Based on the above research results,with the method of single factor analysis,quantitative analysis of sand reservoir performance with the sand porosity and permeability and deposition of each period with the ratio of sand thickness andstratum thickness statistics,establish the sedimentary development,and evolution model of the study area.Analysis of reservoirs in the study area reservoir,which not only determine the favorable reservoir facies belt,but also provide scientific geology evidence for further exploration.