委内瑞拉Barinas Apure盆地油气资源潜力新认识  

New Knowledge of Oil and Gas Resource Potential in Barinas Apure Basin,Venezuela

作　　者：刘亚明[1] 阳孝法[1] 王丹丹[1] 杨瑞财 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油拉美公司

出　　处：《科学技术与工程》2015年第17期121-130,共10页Science Technology and Engineering

基　　金：国家科技重大专项(2011ZX05028);中国石油天然气股份有限公司重大科技专项(2013E-0501)资助

摘　　要：Barinas Apure盆地目前仅在西部前渊带取得有限规模的发现,多年来未能取得勘探突破,迫切需要寻找新的勘探方向。为明确盆地的勘探潜力,在类比分析盆地油气成藏特征的基础上,对盆地开展成藏组合分析,评价其资源潜力及分布,提出了有关勘探潜力和方向的3点新认识:1系统分析了盆地的成藏条件和成藏模式,证实其成藏条件优越,中长距离成藏模式勘探潜力大。南美北部统一的上白垩统浅海相泥岩为盆地提供了充足的油源;上白垩统和第三系浅海、河流相砂岩埋藏浅,储集性能优越;海侵泥岩封堵性能良好;常规油气为中近源成藏模式,取得一定规模发现,重油为远源成藏模式,发现较少。2首次对盆地进行了成藏组合评价。常规油气以上白垩统成藏组合为主,重油以第三系成藏组合为主。3盆地油气资源丰富,勘探程度低,勘探潜力较大。常规油气待发现可采资源量为5.06×108t油当量,重油总资源量为14.93×108t。研究认为,对于盆地的勘探,内斜坡带重油可作为当前勘探突破的目标。常规油气以上白垩统成藏组合为主,重油以第三系成藏组合为主;New exploration direction is the key point to the Barinas Apure Basin for the reason of no breakthrough on exploration in recent years except for a few limited discoveries in the foredeep belt. In order to evaluate the exploration potential of Barinas Apure Basin, oil and gas accumulation model were made on the basis of hydro- carbon accumulation analog analysis with neighbor foreland basins. The exploration direction was pointed out by the study of play and resource evaluation. Three new understandings on exploration potential and directions were pointed out： （1）The accumulation conditions and model were studied systematically, which are as better as the oil and gas rich foreland basins in northern South America, which has similar tectonic evolution, accumulation conditions and model with other foreland basins of northem South America. Source rocks are Upper Cretaceous shallow marine mudstone of the Navay Formation, as high hydrocarbon potential as other foreland basins. Reservoirs are Upper Cretaceous and Tertiary neriticfluvial sandstones, with perfect reservoir capability similar as neighbor foreland basins. The accumulation of oil and gas are mainly controlled by the tectonic setting and the distribution of source rocks. The accumulation model is near-medium and long migration models for conventional hydrocarbon and heavy oil respectively. （2）The play evaluation was done for the first time. The Basin were divided into 3 sets 1 st order play, which are the confirmed middle play and the potential upper and lower plays based on the hydrocarbon bearing con- ditions of reservoirs, and 2 sets of 2nd order play further, which are the Upper Cretaceous and Tertiary play based on the principles of structure of the Basin, reservoir-cap and hydrocarbon enrichment characteristics. Conventional hydrocarbon resources aremainly in the Upper Cretaceous play, heavy oil is mainly in the Tertiary play. （1）the Basin is rich of oil and gas resource, with low level of exploration and huge exploration potential. The u

关 键 词：石油地质 成藏特征 成藏组合 资源评价 勘探 Barinas Apure盆地 委内瑞拉 

分 类 号：TE122.115[石油与天然气工程—油气勘探]