Stratigraphic Reservoir Formation Patterns and the Favorable Zones of Stratigraphic/Lithological Reservoirs in Central Junggar Basin
Received date: 2015-01-14
Revised date: 2015-10-11
Online published: 2015-12-10
Shinan area of Central Junggar Basin is the important exploration area of stratigraphic/lithological reservoirs in China.The hydrocarbon of reservoirs in Jurassic & Cretaceous,where delta under slow and shallow-water covered slope developed,has been sourced mainly from the Permain source rocks.The effect of the movement in Late Eocene has made on the Junggar's structure,which was tilted with the result that the stratigraphic/lithological traps have been changed and the early reservoirs have been adjusted.A number of facts have led to the complexity of lithostratigraphic exploration such as the complex transmition of communicating oil source,the less understanding of the main controlling factors on stratigraphic/lithological reservoir formation and its model,the formation condition of stratigraphic/lithological trap and the low quality and resolution of seismic data.The aim of this study is to build the equal time strata frame of Central Junggar Basin,to analyze the structural characteristic and sediment background in the frame on the basis of generalizing the above problems,and then to analyze the typical reservoirs.The hydrocarbon formation model,called as “large faults-the sides of the sediment system-the migration and gathering” type,is built,in which the hydrocarbon moved along nearly equal depth in side direction.That is to say,the hydrocarbon migrated firstly into the reservoir rocks along faults,then into the structural high in the direction vertical to the structural contour.When the hydrocarbon met with the lateral deposition system's slanting intersected with the structure high's side,the direction changes and it would migrate along the lateral part of sediment system in equal depth,leading to the oil and gas' formation of reservoir followed by migration,and indicates the tilting zone of delta front flank-the favorable development area of stratigraphic/lithological reservoirs.According to the formation model,the favorable exploration zone was concluded.
LIU Wen-feng，SUN De-qiang，YANG Chao-dong，WANG Feng，ZHAO Fan，PENG Yun，WEI Yan-zhao，LIU Hai-tao，JIA Zhi-bin，ZHANG Han-qi . Stratigraphic Reservoir Formation Patterns and the Favorable Zones of Stratigraphic/Lithological Reservoirs in Central Junggar Basin[J]. Natural Gas Geoscience, 2015 , 26(12) : 2267 -2274 . DOI: 10.11764/j.issn.1672-1926.2015.12.2267
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