摘要
致密砂岩气作为非常规油气资源的重要组成部分,近年来已成为天然气勘探的接替领域。天然气主要赋存于泥岩与致密砂岩互层的沉积组合中,以致密砂岩气的形式聚集成藏。良好而丰富的气源岩与紧邻烃源岩发育的有效砂岩的广泛分布是致密砂岩气成藏的基本条件。通过分析渤海湾盆地深层油气成藏的烃源岩和储集层两个主控因素,初步评价了渤海湾盆地深层致密砂岩气的成藏条件,其烃源岩与储层组合具备"千层饼"结构,有利于天然气近源短距运移成藏。多期次沉积砂体垂向叠置、横向联片,易于形成致密砂岩气藏。初步估算歧口凹陷歧北斜坡、辽河西部凹陷清水洼陷、霸县凹陷文安斜坡等区带致密砂岩气资源量约6×1011～7×1011 m3,说明渤海湾盆地深层致密砂岩气具有较好的勘探前景,为渤海湾盆地深层的油气勘探提供地质依据。
As an important part of the unconventional hydrocarbon resource,the tight sandstone gas has been the real replaced region of the gas exploration in recent years.Gases mostly occur in depositional combination of interbeds formed by mud and tight sandstone and form the reservoirs by the form of tight sandstone gas.The abundant hydrocarbon and the wide spread of the functional sandstones around the hydrocarbon sources were the basic condition for the tight sandstone gas to become reservoirs.Through the analysis of the main control factors of the hydrocarbon and reservoirs in the deep zone of Bohai Bay basin,we preliminary evaluated the conditions for the tight sandstone gas to become reservoirs.The combination of hydrocarbon and reservoirs is of ＂multi-layer steamed bread＂ structure contributed to form gas pool with near distance.Multiphase sand body overridden vertically and flaky reservoirs on the lateral direction have contributed to easily form tight sandstone gas.The preliminary evaluation showed that the tight sandstone gas resources in some areas,such as the north slope of Qikou sag,Qingshui subsag of the Liaohe west sag and Wen＇an slope in Baxian sag were about 6×1011~7×1011m3,and showed some better exploration potential about tight sandstone gas in the deep zone of Bohai Bay basin.
出处
《山东科技大学学报（自然科学版）》
CAS
2012年第5期63-70,共8页
Journal of Shandong University of Science and Technology(Natural Science)
基金
中国大型油气田及煤层气勘探开发技术发展战略项目(2008ZX05043)
关键词
渤海湾盆地深层
致密砂岩气
孔隙度
渗透率
勘探潜力
deep zone of Bohai Bay basin
tight sandstone gas
porosity
permeability
exploration potential
