川东石炭系地层—构造复合圈闭控制因素及有利区研究

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—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，根据黄龙纽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—构造复合圈闭有利区带进行了预测。

Study of controlling factors of Carboniferous stratigraphic and structural traps and the favorable areas in the east of Sichuan Province

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 fade 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 Sichuan Province have been done and at last favorable areas with Carboniferous stratigraphic and structural traps in this area have been forecasted.