"Sweet Spot" Types of Reservoirs and Genesis of Tight Sandstone Gas in Kekeya Area, Turpan-Hami Basin
详细信息
- 责任者：Yang Shengyu (Key Laboratory of Marine Reservoir Evolution & Hydrocarbon Accumulation Mechanism ; Ministry of Education ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Jinchuan
- 刊名：Acta Petrolei Sinica
- 出版年：2013
- 卷期：34(2)
- 关键词：砂岩储集层 ; sandstone reservoirs ; 吐哈盆地 ; Tu-Ha Basin
- 页码：p.272-282
- 图表：illus., 2 tables, 32 refs.
- 分类号：1003
- issnNo：ISSN0253-2697
- isbnNo：CN11-2128/TE
摘要
The Lower-Middle Jurassic Shuixigou Group in the Kekeya area is rich in gas resources of tight sandstone reservoirs,analysis of their reservoir "sweet spot" types and genesis is of certain reference significance in the tight sandstone gas exploration & development in the Turpan-Hami Basin and other areas.By contrast of porosity and permeability,core observation,thin-section analysis,fracture statistics,log interpretation and production feature comparison,we summed up "sweet spot" reservoirs developed in the Shuixigou Group of the Kekeya area as two "sweet spot" types,i.e.the pored and fractured.Based on analyses of sedimentary microfacies,mineral compositions,formation water and simulations of basin burial history and basin evolution history,we concluded that specific sedimentary microfacies,relatively weak compaction and relatively strong dissolution are chief reasons of forming pored "sweet spot" reservoirs,while strong tectonic movement and local special tectonic locations control development of fractured "sweet spots" reservoirs.This comprehensive study showed that in the Turpan-Hami Basin,the formation of pored and fractured "sweet spot" reservoirs is a consequent result caused by interaction of deposition,diagenesis and tectonism.