哥伦比亚亚诺斯盆地成藏组合与勘探潜力

为明确亚诺斯盆地的勘探潜力，需对盆地进行成藏组合分析。首先对盆地进行地质评价，然后进行成藏组合
评价，最后对每个二级成藏组合的油气地质特征和资源潜力进行研究，指出下一步的勘探方向。亚诺斯盆地成藏条件
优越，根据储层含油气情况，将盆地划分为证实的中部、潜在的上部和下部共3 套一级成藏组合。根据盆地的构造、生
储盖与油气富集特征等6 项原则，进一步将中部成藏组合划分为上白垩统、古新统、始新统和渐新统4 套二级成藏组
合。研究认为，盆地所有成藏组合内待发现可采资源量为3.06×108 t 油当量，以上白垩统成藏组合的资源规模最大。
对于盆地下步勘探，应以上白垩统和始新统成藏组合为主，内斜坡带和前渊带为主要目标区带。首次应用的成藏组合
分析步骤和划分原则等研究方法对其他盆地的成藏组合研究具借鉴作用。

Play and Exploration Potential of the Llanos Basin in Colombia

The exploration potential of the Llanos Basin in Colombia was made clear by the method of play analysis. The
geological evaluation of the basin was made firstly，secondly the play evaluation，then the petroleum geology features and
the resource potential of each 2nd order play，and the exploration direction was pointed out lastly. The basin has excellent
accumulation conditions and perfect accumulation model. According to the oil and gas bearing situation of each reservoir，
the basin was divided into 3 sets of 1st order play，including the confirmed central play，the potential upper and lower plays.
According to the six principles of the structure of the basin，generation-reservoir-seal，oil and gas enrichment characteristics
and so on，the central play was further divided into 4 sets of 2nd order play：the upper Cretaceous，Paleocene，Eocene and
Oligocene. The recoverable resources of all the plays are 3.06×108 tons of oil equivalent，and the upper Cretaceous play is of
the largest resources volume. Upper Cretaceous and Eocene plays are the key exploration plays，and inner slope and foredeep
are the key zones. The steps and rules of play analysis applied in this paper for the first time can be a reference to the study of
plays in other basins.