摘要
准南属周缘前陆盆地 ,煤系天然气资源十分丰富 ,圈闭面积大 ,保存条件好 ,具备形成大中型气田的有利条件 ;但同时又是一个勘探程度低 ,成藏机制较为复杂 ,并且具有一定勘探风险的地区。天然气成藏受到烃源、圈闭、运聚和保存等多种条件的控制 ,其中最重要的是各成藏条件的良好配置和沟通生、储层的烃源断层的发育。此外 ,异常高压也是影响天然气成藏的重要因素之一。采用岩石声发射实验和ESR测年技术分析 ,结合地震资料解释确定了烃源断层的形成时期主要为燕山期。以成藏期次为主线 ,综合考虑成藏机理和主控因素 ,建立了准南天然气成藏模式 ,喜山期第三系次生气藏是勘探的重点。准南今后天然气勘探方向应以侏罗系含油气系统的次生气藏为主 ,有利区为第二、三排构造带。
South Zhunge'er Basin is a kind of peripheral foreland basin, where it is rich in coal measure gas source with a large area of traps and good sealing conditions. It is equipped with a good environment for forming medium- or large-gas fields. But this area possesses exploration risk with lower exploration scales and complicated gas reservoirs formation mechanism. Gas reservoirs are restricted by many factors like gas sources, traps, migration, accumulation and sealing, etc. Among these conditions the most important ones are good match of gas pool formation conditions and developing faults connecting sources and reservoirs. Besides, abnormal high pressure is also an important factor of gas pool formation. The formation period (Yanshan Age) was determined by analyzing AE (acoustic emission), ESR (electron spin resonance dating) and seismic data. Gas pool formation models were sat up according to gas pool formation age, formation mechanism and controlled factors. Tertiary secondary gas reservoirs in Himalaya n Age will be exploration focal point. The second and third row structure belts are potential gas accumulation areas.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2001年第4期27-31,共5页
Natural Gas Industry
关键词
准噶尔盆地
天然气
成藏模式
含油气系统
勘探方向
Zhunge'er Basin, South, Natural gas, Formation models, Oil or gas bearing system, Exploration direction
