对五八区佳木河组沉积特征和储层特征的整体认识The Overall Understanding of the Sedimentary Characteristics and Reservoir Characteristics of the Jiamuhe Formation, 5-8 District
李璐, 刘明军, 胡志鹏, 龚福华
五八区, 佳木河组, 扇三角洲相, 火山岩相, 储层评价5-8 District, Jiamuhe Formation, Fan-Delta Facies, Volcanic Facies, Reservoir Evaluation
《Advances in Geosciences》, Vol.6 No.3, 2016-06-08
The stratum of Jiamuhe Formation in northwestern margin of the Junggar basin is very thick, which consists of volcano rock and clastic rock. There are 5 facies in the study area including alluvial fan facies, fan delta facies, effusive facies, eruption facies and retransported volcano clastic facies. The first member of Jiamuhe Formation, in which volcanic rock widely distributes along the fault, develops volcano facies, fan delta facies and middle alluvial fan sub-facies. The physical property of the first member of Jiamuhe Formation is better, which develops I or II class reservoir in the volcano clastic rock facies while the class III reservoir mostly develops in the clastic rocks. The fan delta facies are widely developed in the second member and third member of Jiamuhe Formation, and the volcanics in the third member are much more than the second member. The mainly reservoir type in the second member and third member of Jiamuhe Formation is III class reservoir, while I, II class reservoirs are also developed in it. Jiamuhe Formation is a good reservoir, the oil content is high, and soit can be taken as a key position for oil & gas exploration and development. The I class and II class reservoirs in the Jiamuhe Formation are mainly developed in the lower subfacies of effusive facies and hot detrital flow subfacies of outbreak facies. Volcanic rock reservoir is worth paying attention to and focusing on the prediction of fractures and dissolution zone.