南盘江盆地油气资源评价中类比法的应用

南盘江盆地是勘探程度很低的南方海相沉积盆地,在全国第三次资源评价中盆地类比法是评价其油气资源并很具参考价值的一种方法。盆地类比法以盆地性质类比为基础,以数理统计方法为手段评价油气资源量。按克列姆(Klemme)的盆地分类,南盘江盆地属于陆内复合型盆地,其油气资源背景与世界上同类的盆地具有一定的可比性。南盘江盆地与美国的帕拉多盆地及特拉华盆地在许多方面具有大的相似性:盆地类型相同,大地构造类型相同,构造发展基本相同,沉积环境基本一致,都以碳酸盐岩天然气藏为主。在资源量计算中,选取美国6个有产能的同类型盆地以及两个资源量为零的样本进行统计分析,得出该类型盆地资源量丰度的概率分布曲线,从而得出南盘江盆地油气资源量。

Application of Analogy in Estimating the Petroleum Resources in Nanpanjiang Basin

Nanpanjiang basin is a marine sedimentary basin which is explored little in southern China. The method of basin analogy is referential to estimate the oil(gas) resources of Nanpanjiang basin in the third round assessment of Chinese oil(gas) resources. Basin analogy estimates oil(gas) resources based on the analogy of basin type and statistics. According to Klemme's basin classification, Nanpanjiang basin belongs to intracontinental complex basin, and its oil(gas) resources is analogical to other intracontinental complex basins. Nanpanjiang basin is similar to Prado basin in the United States: their geotectonic cycles and sedimentary conditions are similar, and they are all typical of carbonate rock natural gas pool. Six American intracontinental complex basins and two other basins with no oil(gas) resources are selected as samples for oil(gas) resources calculation, and the probability distribution curve of resources abundance can be ploted, and oil(gas) resources of Nanpanjiang basin is obtained.