摘要
满加尔油气系统位于塔里木盆地中部 ,是一个以寒武 奥陶系为主力烃源岩的下古生界克拉通油气系统。在“九五”攻关成果基础上 ,利用油气系统动态分析模拟软件DYMAPS对满加尔油气系统进行了模拟分析。结果表明 ,下古生界烃源岩有奥陶纪末和第三纪末两个主要的生、排烃高峰期 ,对应于油气系统的两个关键时刻 ,在晚奥陶世末的关键时刻生成了寒武系累计89%的油和 44%的气、下奥陶统累计 79.6%的油和 2 6.3 %的气 ,第三纪末的关键时刻主要是二次生气高峰期 ,同时也有一定量的液态烃生成。下古生界烃源岩在西部坡折带及南北隆起区现今仍处于有效生油窗内 (镜质组反射率小于 1.3 % )。利用拟三维二相油气运聚模型定量模拟了满加尔油气系统主要目的层(寒武系 ,下奥陶统 ,中、上奥陶统 ,石炭系 ,三叠系 )的油气可供聚集量 ;区带数值模拟显示该油气系统内共有 9个最有利勘探区带和 10个次有利区带。
Th e Manjar petroleum system, which is located in the central part of the Tarim bas in and with Cambrian-Ordovician as its main source rock formation, is a Lower P ale ozoic cratonic petroleum system. On the basis of the previous achievements of th e 'Ninth Five-Year Plan', the software DYMAPS (Dynamic Modeling Analysis of P et roleum System) is used to carry out the modeling analysis for the Manjar petrole um system. The research results indicate that, the Lower Paleozoic source format ions have two hydrocarbon generation and expulsion peaks, the end of late Ordovi cian and the end of Tertiary, representing the two critical moments of the petro leum system. Of all the hydrocarbons yielded up to the present, Cambrian source rock′s 89% of oil and 44% of gas and Lower Ordovician source rock′s 79.6% of o il and 26.3% of gas were generated at the first moment. The second critical mome nt is mainly the second gas generation peak, with a given amount of oil generated. Nowadays, at the western slope and the northern and southern uplifts the Lower Paleozoic source formations are still in the active oil generation threshold ( R o <1.3%). By means of the pseudo-3D and two-phase hydrocarbon migration a nd accumulation model, oil and gas accumulation amounts of the main reservoir fo rmations (∈, O 1, O 2-3, C and T) of the petroleum system are simulated. Play numerical modeling result shows that there exist 9 most favorable plays an d 10 favorable plays in the petroleum system.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2001年第5期33-36,共4页
Petroleum Exploration and Development
基金
国家"九五"科技攻关项目 (编号 96 1 1 1 0 1 0 3 )成果报告 . 1 998
关键词
塔里木盆地
油气系统
动态数值模拟
烃源岩
储集层
Talimu basin, Manjar depression, Petroleum system, Play, Critical moment, N umerical simulation, Evolution
