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| 黔中隆起及其周缘地区下古生界油气勘探前景与方向 | |
| 引用本文： | 杨长清,岳全玲,曹波.黔中隆起及其周缘地区下古生界油气勘探前景与方向[J].现代地质,2008,22(4). |
| 作者姓名： | 杨长清 岳全玲 曹波 |
| 作者单位： | 1. 中国石化,西南油气分公司博士后工作站,四川,成都,610081;成都理工大学,博士后流动站,四川,成都,610059 2. 中国石化,勘探南方分公司研究院,四川,成都,610041 3. 中国石化,西南油气分公司研究院,四川,成都,610081 |
| 摘 要： | 黔中隆起位于上扬子板块东南缘,经历了前震旦纪基底形成、早震旦世裂谷、晚震旦世—志留纪被动大陆边缘、泥盆纪—中三叠世陆内裂谷与克拉通盆地和晚三叠世—第三纪陆内盆地5大演化阶段。该区具有较好的成油气地质条件;发育上震旦统陡山沱组泥页岩和下寒武统牛蹄塘组泥页岩两套区域烃源岩及下奥陶统湄潭组和下志留统龙马溪组局部泥页岩烃源岩,具有很强的生烃潜力;发育上震旦统灯影组白云岩、寒武系金顶山组碎屑岩、高台组—娄山关组碳酸盐岩和下奥陶统—下志留统储层;而牛蹄塘组泥岩和娄山关组膏盐白云岩与上二叠统龙潭组含煤泥岩是该区区域性盖层,湄潭组、龙马溪组为局部盖层;该区保存条件复杂,燕山、喜山构造运动对早期油气藏的改造和破坏较大,是该区油气成藏的主要控制因素,也是该区油气勘探的主要风险所在。研究认为该区油气勘探潜力较大,而安顺凹陷、三塘—百兴凹陷和黔西凹陷整体油气保存条件较好,为最有利天然气勘探区带。 |
| 关 键 词： | 勘探前景 下古生界 构造—沉积演化 区域保存条件 黔中隆起 |
Natural Gas Exploration Prospect and Direction in Lower Paleozoic in Qianzhong Uplift and Its Periphery |
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| YANG Chang-qing,YUE Quan-ling,CAO Bo.Natural Gas Exploration Prospect and Direction in Lower Paleozoic in Qianzhong Uplift and Its Periphery[J].Geoscience——Journal of Graduate School,China University of Geosciences,2008,22(4). | |
| Authors: | YANG Chang-qing YUE Quan-ling CAO Bo |
| Abstract: | Qianzhong uplift and its periphery are located in passive continental edge of south-eastern part of Upper Yangtze Plate in Early Paleozoic,which has experienced five evolution stages such as the stage to form pre-Sinian base,the stage of rift in Early Sinian,the stage of passive continental margin basin from Late Sinian to Silurian,the stage of continental rift and craton basin from Devonian to Mid-Triassic and the stage of continental basin from Late-Triassic to Eogene,possessing favorable geological conditions to generate oil and gas.There develop two sets of regional oil-generating strata:muddy shale of Doushantuo Formation of Upper Sinian and muddy shale of Niutitang Formation of Lower Cambrian as well as muddy shale of Meitang Formation of Lower Ordovician and muddy shale of Longmaxi Formation of Lower Silurian,regional hydrocarbon source rocks have great ability to generate hydrocarbons.There develop reservoirs as dolomites of Dengying Formation of Upper Sinian,clastics of Jingdingshan Formation of Cambrian,carbonates of Gaotai Formation and Loushanguan Formation as well as Lower Ordovician-Lower Silurian,while mudstones of Niutitang Formation and gypsum dolomites of Loushanguan Formation as well as coal mudstones of Longtan Formation of Lower Permian are regional cover rocks in this area,they are also the regional cover rocks of Meitan and Longmaxi formations.Preserving conditions are very complicated and Yanshan and Xishan movements are the main controlling factors for the formation of oil accumulation.According to these studies,this area has great potential for natural gas exploration.Anshun Depression,Santang-Baixin Depression and Qianxi Depression,which have better regional preserving conditions,are the most favorable belts for natural gas exploration. |
| Keywords: | exploration potential Lower Paleozoic structural-sedimentary evolution regional preserving condition Qianzhong uplift |
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