哥伦比亚西努￣圣哈辛托盆地油气地质特征

Petroleum geological features of Sinu-San Jacinto Basin in Colombia

张波 袁炳强 宋立军 张春灌

西安石油大学地球科学与工程学院，陕西 西安 710065

School of Earth Science and Engineering, Xi′an Shiyou University, Xi′an 710065, China

运用盆地分析及石油地质学的理论与方法，系统分析了哥伦比亚西努￣圣哈辛托盆地的沉积构造演化和油气地质特征，结果表明：西努￣圣哈辛托盆地主要发育白垩系及新生界沉积盖层；主要烃源岩为上白垩统Cansona组海相页岩、古新统San Cayetano组页岩及渐新统Maralu组页岩，主要储集层为古新统San Cayetano组砂岩、渐新统Cienaga de Oro组砂岩及灰岩、渐新统Pavo组砂岩，上古新统San Cayetano组泥岩、中新统Floresanto组泥岩以及部分不整合面可作为盖层。西努￣圣哈辛托盆地内，与逆冲断层相关的构造圈闭和地层圈闭、与不整合面相关的地层圈闭具有良好的勘探前景。

This paper systematically analyzes the deposit-tectonic evolution and petroleum geology features of Sinu-San Jacinto Basin in Colombia using the theory and method of basin analysis and petroleum geology. The results show that Cretaceous and Cenozoic rocks are the main sedimentary rocks of Sinu-San Jacinto Basin. The Upper Cretaceous Cansona Formation marine shale, Paleocene San Cayetano Formation shale and Oligocene Maralu Formation shale are the main source rocks. The main reservoirs are Paleocene San Cayetano Formation sandstone, Oligocene Cienaga de Oro Formation sandstone and limestone and Oligocene Pavo Formation sandstone. The Upper Miocene San Cayetano Formation mudstone and Miocene Floresanto Formation mudstone and unconformity can be used as cap rocks. The structural traps and stratigraphic traps associated with thrust faults and the stratigraphic traps associated with unconformity have favourable exploration prospects in Sinu-San Jacinto Basin.

10.6056/dkyqt201402004