天然气工业2017，Vol.37Issue(12)：11-17,7.DOI:10.3787/j.issn.1000-0976.2017.12.002
四川盆地东北部马路背地区上三叠统须家河组二段气藏高产机制
High-yield mechanism of the second Member of Upper Triassic Xujiahe reservoir in the Malubei area, NE Sichuan Basin
摘要
Abstract
The tight sandstone gas reservoir of the second Member in the Upper Triassic Xujiahe Fm (Xu 2 Member for short) in the Malubei area of the northeastern (NE) Sichuan Basin is a part of the Tongnanba structural belt,presenting the development characteristics of high yields,stable production rates and high producible degrees without water.To promote the exploration of the Xujiahe Fm gas reservoir in the Tongnanba structural belt,it is necessary to discuss the high and stable yield mechanism of Xu 2 Member gas reservoir in the Malubei area from the aspects of source rock,reservoir and fault conduit system based on abundant assay data.And the following research results were obtained.First,double hydrocarbon supply of marine and continental quality source rocks is the foundation for the formation of this reservoir,and it provides the guarantee of natural gas resources.Second,the reticular effective reservoir permeability system which is the superimposition product of large-scale reticular fractures and extensive tight reservoirs is important for the formation of this gas reservoir,and it provides the space for natural gas storage.And third,the fault conduit system is the key to the formation of this gas reservoir and it efficiently communicates the deep marine hydrocarbon source with the continental reticular effective reservoir permeability system.To sum up,the Tongnanba structural belt is generally a large-scale special structure which is complicated by the cutting of faults,and it is distributed in rows and zones like the Malubei structure,so the important direction of future natural gas exploration in the Tongnanba structural belt is to search for the gas reservoirs similar to the Xu 2 Member gas reservoir in the Malubei structure in terms of source rock,reservoir and fault conduit system.关键词
四川盆地/马路背地区/晚三叠世/须家河组二段气藏/高产稳产机制/双重供烃/网状有效储渗体/断裂输导体系Key words
Sichuan Basin/Malubei area/Late Triassic/Second Member of Xujiahe reservoir/High and stable yield mechanism/Double hydrocarbon supply/Reticular effective reservoir permeability system/Fault conduit system引用本文复制引用
王威,林良彪..四川盆地东北部马路背地区上三叠统须家河组二段气藏高产机制[J].天然气工业,2017,37(12):11-17,7.基金项目
国家科技重大专项“碎屑岩层系大中型油气田富集规律与勘探关键技术”(编号:2016ZX05002-004). （编号:2016ZX05002-004）
