摘要
油气水界面追溯法确定成藏期的基本原理是 ,油气藏形成时的油气水界面通常为水平界面 ,现今油气藏的各井油气水界面的古埋深点最早能够连成水平线 (面 )的地质时期就是成藏期。用此方法分析的结果 ,塔中地区石炭系油藏普遍形成于晚海西期 ,燕山期为调整再成藏时期 ,喜马拉雅运动期是调整再成藏和油藏定型时期 ;满西地区哈得 4油田CⅢ 油藏可能在石炭纪—二叠纪开始形成 ,以后经过多期改造 ,调整再成藏的时间主要为侏罗纪和晚第三纪 ;轮南地区三叠系古油藏在晚第三纪吉迪克组沉积期已形成 ,康村组沉积期是三叠系古油藏重要调整与侏罗系次生油藏的形成时期 ,库车组沉积期是调整再成藏时期。认为塔里木盆地目前发现的古生界海相油藏主要形成于晚海西期 ,中生界油藏多是古生界油藏在喜马拉雅运动期因构造变动及气侵作用调整而形成的次生油气藏 ;克拉通区普遍出现油气藏晚期调整的现象 ,与中、新生代频繁而强烈的构造变动、克拉通区构造幅度普遍较低和喜马拉雅运动晚期大量高 过成熟气的注入有关。图 3参
Oil or gas water contact retrospecting of reservoirs is proved to be an effective method in timing petroleum accumulations. The basic principle of this method is that a regular reservoir is formed with a level oil or gas water contact and the hydrocarbon charging time can therefore be determined by tracing the earliest occurring time of the leveled contact. By using this method, it can be concluded that the Carboniferous oil accumulations in the Tazhong uplift were mainly formed in the late Hercynian and adjusted and reformed in the late Yanshanian (Jurassic to Cretaceous) and Himalayan (Cenozoic). The Carboniferous C Ⅲ reservoir of Hede 4 oil field in the west Manjiaer region was also formed in the late Hercynian and adjusted and reformed in the late Jurassic and Neogene, whereas its C 5 reservoir is possibly a secondary pool formed in the late Himalayan by adjustion of the C Ⅲ accumulation. The Lunnan Triassic oil accumulations were mainly formed in the Jidike period of Miogene, adjusted later in Kangcun period and finally reformed in Kuqa period. The analysis, together with other evidence such as fluid inclusion and authigenic illite's K Ar dating, reveal that the late Hercynian is the major period for the formation of the Paleozoic marine oil reservoirs in the Tarim basin, whereas the Mesozoic oil accumulations were formed as secondary pools by the adjusting of the Paleozoic ones during the Himalaya period.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2001年第4期53-56,共4页
Petroleum Exploration and Development
基金
国家"九五"重点科技攻关项目 99 1 1 1 0 1 0 4 0 5专题部分研究成果
关键词
塔里木盆地
海相油气成藏期
渍气水界面追溯法
原理
Talimu basin, Craton, Primary reservoir, Hercynian orogeny, Forming, Secondary reservoir, Himalayan orogeny, Oil water interface, Gas water interface, Change
