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Genetic Analysis of the High Quality Reservoir of Triassic Baikouquan Formation in Mabei Region,Junggar Basin
Author(s): 
Pages: 1171-1180
Year: Issue:  6
Journal: Acta Sedimentologica Sinica

Keyword:  Junggar BasinMabei regionTriassic Baikouquan Formationreservoirgenesis;
Abstract: The petroleum exploration of Junggar Basin shows that a mass of high quality reservoirs developed in Triassic Baikouquan Formation of Mabei region,while the genesis of high quality reservoir still needs further research. The characteristics of reservoir petrology,physical property,sedimentary environment and diagenesis indicate that reservoir of Triassic Baikouquan Formation in Mabei area is mainly composed of coarse clastic glutenite. The fine grained clastic sandstone reservoirs less developed,reservoirs average porosity is mainly between 7% and 9%,and average permeability is 0.9×10-3μm2and 1.4×10-3μm2; Fan-delta front subaqueous distributary channel and fan-delta plain distributary channel are favorable reservoirs which are affected by structural slop-break zone,due to long time water washing,Fan-delta front subaqueous distributary channel glutenite reservoir property is best and then Fan-delta plain distributary channel sand body. Compaction causes higher argillaceous matrix glutenite reservoir property irreversibly decrease,proper eogenetic cement provide the supported grain skeleton,which can resist compaction effect on reservoir physical properties,but late diagenesis lots of cement can block the pore and bad to reservoirs. Whereas the dissolution of feldspar particles and zeolite cement has positive significance on the improvement of the reservoir property.
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