Sand Body Connectivity And Its Value In Oil And Gas Accumulation In Wu-Xia Fault Zone Of Junggar Basin

This thesis is from the project Fine Exploration Potential in Wu-Xia Fault Zone of Junggar Basin.Based on sequence analysis,the study used log data,well logging data,test report,geochemical information and test data of physical property to complete this paper.This thesis mainly analysed sand body macro connectivity ,which included investigating sand body distribution, connectivity on cross section ,contact thickness and macro connectivity parameter. The paper studied the whole distribution and vertical connectivity through sand body and cross section, and used contact thickness to show interjacent heterogeneity.When analysing macro connectivity parameter, the whole rate of drilling sand body of sandstone and conglomerate reveas strata conducting capacity, the rate of drilling sand body of different lithology reveals the nature of main conducting layer.Combined average thickness and layers of drilling sand body reflect the conducting capacity of special lithology. In order to analyse single sand body ,this thesis studied the computational method of sand body length. The poroperm characteristics of different kinds of sandstone and conglomerate reflect their microcosmic conducting capacity,and porosity and permeability maps are used for further analysing migration passway. In order to search the actual migration passway, the study summed up the points about source rock and migration,and analysed migrating direction within FengCheng formation and T2k2 in WuErHe area by alkane∑C21-/∑C21+.At last combining the knowledge of discoveried reservoir and sand body macro connectivity and migrating direction reflceted by show of gas and oil in cross section,this thesis found out four kind of accumulating models and pointed out that sand body played an important conducting role in XiaZiJie formation and Trassic during hydrocarbon accumulation.