南鄱阳坳陷油气地质特征  

Characteristics of petroleum geology in South Poyang Depression

作　　者：周松源[1,2] 郑华平 彭军[1] 徐克定 蒋维三 刘家铎[4] 

机构地区：[1]西南石油学院资源与环境学院 [2]中国石油浙江勘探分公司,杭州310013 [3]中国石油浙江勘探分公司 [4]成都理工大学

出　　处：《新疆石油地质》2005年第6期618-622,共5页Xinjiang Petroleum Geology

基　　金：四川省重点学科建设项目;矿产普查与勘探(SZD0414)资助

摘　　要：南鄱阳坳陷为中-新生代陆相盆地与中-古生代海相-海陆过渡相盆地的叠合盆地,具有上张下压的结构特征。下构造层发育九岭推(滑)覆构造,自北向南推(滑)覆至南鄱阳坳陷中-南部,南侧的官帽山逆冲体系向北冲,其间的对冲前缘带为二叠系保存的有利区。中-新生代盆地发育演化受燕山运动中期古构造格局和赣江断裂带活动的控制。烃源岩发育在二叠系,龙潭组树皮煤为本区富有特色的优质煤成油烃源岩;纵向上发育多套储盖组合,具备以断块构造圈闭和砂岩岩性圈闭为主的多种圈闭类型;二次生烃、晚期成藏的龙潭组自生自储岩性-构造复合圈闭为最有利的成藏类型。The South Poyang depression is an overlay basin formed by the Mesozoic-Cenozoic continental basin and the Paleozoic-Mesozoic marine-transitional basin, characterized by upper tensile structure and lower compressive structure. The Jiuling Nappe （slide） System in lower tectonic layer overrides （slides） from north toward middle-south part of the depression, while Guanmaoshan overthrust system moved to north forms a ramping front belt which is a favorable zone for petroleum exploration conserved in Permian. The evolution of the Mesozoic-Cenozoic basin is controlled by the paleo-tectonic framework and Ganjiang faulting belt in the mid-episode of Yanshan movement. The source rocks are developed in Permian, and the bark-like coal of Longtan formation （P21） belongs to a high quality of coalderived-oil source rock, with multiple types of traps dominated by block structural traps and sandstone lithologic traps in the depression. It is concluded that the most favorable type of hydrocarbon accumulation is the complex lithologic-structural trap with both source and reservoir in Longtan formation that underwent the secondary hydrocarbon generation and late-stage hydrocarbon accumulation in the depression.

关 键 词：南鄱阳坳陷 构造演化 煤成油 生油层 生储盖组合 

分 类 号：TE112[石油与天然气工程—油气勘探]