深盆气资源量—储量评价方法

DEEP BASIN GAS RESOURCE-RESERVE EVALUATION METHOD

深盆气藏是致密储层中与源岩相连的有根状气水倒置关系的气藏 ,是一类在成藏机理和分布规律方面都比较特殊的油气藏类型 ,常发育在盆地的构造低部位 ,在碎屑岩沉积盆地中具有广阔的勘探和发现前景。目前对深盆气资源量—储量评价方法的系统研究基本上仍是一个空白。根据深盆气藏的基本特征 ,结合油气资源评价方法论中的基本原则 ,较为扼要系统地提出了 10种深盆气资源量—储量预测方法 :特尔菲估计法、相似盆地地质条件类比法、盆地剩余资源量分析法、天然气聚散平衡计算法、地层流体异常压力恢复法、深盆气成藏条件分析预测法、盆地数值模拟法、深盆气藏甜点规模序列法、有效储层体积 (容积 )

Deep basin gas, or basin centered gas accumulation, is a kind of hydro-inverted tight-sand gas with tightly connection between reservoirs and source rocks. It's formation mechanism and distribution rules are distinguished evidently from normal ones. Existing always in the lower structural parts of clastic basins, deep basin gas accumulations are of capacious perspectives for exploration and discovers. It is still a blank area to study systematically the estimation methods of resources and reserves of special gases. According to the general characteristics of deep basin gases and essential principles of resource assessment, the authors put forward compendious 10 theoretical methods for further discussing. They are respectively Delphi estimation by experts, geological analogies by resemble basins, equilibrium evaluation by charging and escapement, renewing calculation of formation pressure, inferential computation of mechanism conditions, quantitative simulation, size listing of sweet spots, volume statistic of available reservoirs, and development prognosticate.