南方海相页岩气超压特征及主要选区指标研究

Natural Gas Geoscience(2016)

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Abstract
针对我国南方海相高成熟、强改造的地质背景,结合国内典型的超压页岩气田的特征分析,系统开展页岩气超压特征、成藏机制研究,认为增压机制主要包括构造增压、水热增压、黏土矿物脱水增压及生烃增压,焦石坝页岩气田为典型的构造增压型超压页岩气田,长宁页岩气田为典型的生烃增压型超压页岩气田.认为针对我国南方整体较为复杂的构造特点,应该把地层压力系数作为一项重要指标纳入页岩气地质选区指标体系,可以充分体现我国南方海相页岩气成藏的特征,同时提高页岩气地质选区的准确性.
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Key words
Ultra-low saturation,Marine shale,Over-pressure core area,Strata pressure coefficient
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