川东石炭系地层—构造复合圈闭控制因素及有利区研究.pdf

海 洋 石 油 · 40· 0FFSH0RE 0IL 2008年6月 文章编号：1008—2336(2008)02—0040—07 川东石炭系地层一构造复合圈闭控制因素及有利区研究 康保平，张 箭，张志勇，彭光明，廖开贵 (中国石油化工股份有限公司西南分公司勘探开发研究院，四川成都 610081) 摘 要：根据川东石炭系实钻资料，结合前人资料对石炭系地层～构造复合圈闭进行了分类和总结；在此基础上，对川东 石炭系地层一构造复合圈闭的控制因素进行了研究。研究表明沉积相是地层～构造复合圈闭的次要控制因素，而古岩 溶、古构造是其主要控制因素；在此过程中，根据黄龙组残余厚度分布状况提供的岩溶剥蚀强度信息、经压实恢复上覆梁 山组碳质泥岩等厚度图反映的黄龙组顶面侵蚀地形变化印模及由岩溶相组合特征所显示的古水文条件，恢复了川东地 区黄龙组古岩溶地貌。在分析古岩溶地貌单元古水文状况、溶蚀方式和强度、古构造及古岩溶厚度的基础上，对川东内 古岩溶进行了区块划分。最后综合了各种资料，对川东石炭系地层一构造复合圈闭有利区带进行了预测。 关键词：石炭系；地层一构造复合圈闭；古岩溶；控制因素；有利区带 中图分类号：TE121．2；TE122．3 文献标识码：A Study of controlling factors of Carb0nifer0us stratigraphic and structural traps and the favorable areas in the east of Sichuan Province Kang Baoping，Zhang Jian，Zhang Zhiyong，Peng Guangming，Liao Kaigui (Exploration and Development Research Institute，SINOPEC South West Company，Chengdu 610081) Abstract：According to exploration drilling data of Carboniferous strata in the east of Sichuan Province， Carboniferous stratigraphic and structural traps were classified in this paper．On the basis of this research achievement，controlling factors of these traps WaS analyzed that the sedimentary facie are subordinate factors，while paleokarsts and paleostructures are the main controlling factors．During the proccess，palaeokarst’s topography of Huanglong formation has been resumed according to karst’S denudation intensity data provided by relic thickness of Huanglong formation，erosion land modification’S printer of Huanglong formation reflected by carbargilite’S isopach map of Liangshan formation and ancient hydrologic condition showed by characteristic of karst’S facies ． Structural divisions of paleokarsts in the east of