非常规油气概念、特征、潜力及技术——兼论非常规油气地质学

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提出了石油地质学正向常规油气地质学与非常规油气地质学两大学科方向发展,常规油气地质学研究的核心是“圈闭是否成藏”,重点评价“生、储、盖、运、圈、保”6要素匹配关系;非常规油气地质学研究的核心是“储集层是否含油”,重点评价“岩性、物性、脆性、含油性、烃源岩特性、应力各向异性”6性及其匹配关系.建立了不同喉径下限油气运聚模式和理论公式、非常规油气开采“L”型生产曲线与产量理论预测模型,揭示了非常规油气形成机理与开采规律.重点阐述了非常规油气的内涵、特征、潜力与技术,提出了鉴别非常规油气的两个关键标志:①油气大面积连续分布,圈闭界限不明显;②无自然工业稳定产量,达西渗流不明显.全球非常规与常规油气资源比例大约8:2,其中非常规石油资源与常规石油大致相当,非常规天然气资源约是常规天然气的8倍.中国非常规石油资源约240×108t,非常规天然气资源约100× 1012 m3.近期非常规油气增储上产的重点为致密油和致密气,要加大页岩气工业化试验区建设和页岩油探索力度,未来需要建立“非常规油气地质学、细粒沉积学、非常规储集层地质学、地球物理预测六性、水平井规模压裂、平台式工厂化开采、管理低成本与政策补贴、非常规人才培养”等非常规油气工业体系.
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