石油勘探与开发2017，Vol.44Issue(1)：58-68,11.DOI:10.11698/PED.2017.01.07
四川盆地高石梯—磨溪地区灯四段岩溶古地貌恢复及地质意义
Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significance
摘要
Abstract
Based on 3-D seismic data and drill-hole data in Moxi-Gaoshiti area,the impression seismic thickness from the top of Longwangmiao Formation,which is easier traced,to the bottom of Cambrian System was selected to characterize the karst paleogeomorphology of the fourth Member of Dengying Formation.The paleogeomorphology of the member can be further divided into three geomorphie units:karst platform,slope and superimposed slope,which had different paleohydrologic conditions,and thus different karstification intensity and reservoir quality.Among them,the superimposed slope with the strongest dissolution,has larger solution groove and cave systems,where the reservoirs with mainly honeycombed dissolved pores and cavities as storage space,are best in quality;the platform slope with weaker dissolution,has smaller solution groove and cave systems,where the reservoirs are poorer than those in the superimposed slope;the karst platform with the weakest dissolution,has piebald karst systems mainly,where the reservoirs with mainly pinhole to smaller dissolved pores and cavities as storage space,are poorer in quality on the whole,but there are some good quality reservoir bodies in local areas.The results show that,besides the highly explored scarp belt,the karst platform with low exploration degree can also be favorable exploration area of the fourth member of Dengying Formation.关键词
古地貌/岩溶台面/斜坡/叠合斜坡/寒武系龙王庙组/震旦系灯影组/高石梯—磨溪地区/四川盆地Key words
paleogeomorphology/karst platform/slope/superimposed slope/Cambrian Longwangmiao Formation/Sinian Dengying Formation/Moxi-Gaoshiti area/Sichuan Basin分类
能源科技引用本文复制引用
金民东,许浒,罗冰,谭秀成,童明胜,曾伟,刘宏,钟波,刘庆松,连承波,周星合..四川盆地高石梯—磨溪地区灯四段岩溶古地貌恢复及地质意义[J].石油勘探与开发,2017,44(1):58-68,11.基金项目
“十三五”国家科技攻关项目(2016ZX05004002-001) （2016ZX05004002-001）
国家自然科学基金项目(41402126) （41402126）
