成藏组合快速分析技术在海外低勘探程度盆地的应用

Application of play quick analysis technique in oversea basins with low-degree exploration

现在中国石油企业海外低勘探程度区块逐渐增多,需要一套针对低勘探程度盆地(区块)快速确定勘探方向的方法。根据成藏组合与油气勘探的方向和勘探部署密切相关的特点,讨论了成藏组合的定义、研究内容及其与区带之间的区别,重点介绍了成藏组合快速分析技术在海外低勘探程度Melut盆地迅速确定勘探方向时的应用。在资料分辨率保证的前提下,打破了国内勘探初期先平面分区、后分层评价的传统模式,勘探伊始就以最能反映油气聚集特征的纵向划分入手,划分出不同的成藏组合。在确定油源的前提下,通过对储层、盖层、运移通道,断层封闭性、构造、有利圈闭及配套条件等方面的快速分析,迅速确定了主力成藏组合和主力成藏带,优选了勘探目标,在苏丹Melut盆地取得良好的勘探效果。

Chinese oil companies have more and more low degree exploration oversea basins or blocks, there＇s a keen need for some techniques which can get the exploration targets quickly in such area. On the basis of intimate relationship between play and exploration deployment,the paper discussed the definition of play,the difference between play and zone,and the content of play analysis. More attention was paid on the application of the play quick analysis technique in Melut Basin with low degree exploration. The domestic exploration procedure usually divided a basin into planar areas in the first stage, then evaluated the layers of each area individually in the second stage. Under the condition of good seismic resolution, the exploration of Melut Basin abandoned the traditional model. In the first exploration stage, several plays were divided vertically in order to show the characteristics of petroleum accumulation more clearly. With the assurance of source rock,the main play and prospect targets were chosen quickly by the assessment of reservoir, cap rock,migration passageway, seal ability of the faults, structure characteristics, favorite traps and the allied conditions. Good exploration result has been obtained in Melut Basin.