| 摘要: |
| 西纳土纳盆地是南海重要的含油气盆地之一。根据含油气系统“从源岩到圈闭”的核心思想，本文以盆地油气田的最新资料为基础，结合盆地构造-沉积演化历程，运用石油地质综合研究方法，对盆地内主要含油气系统进行分析与划分，且在空间上圈定含油气系统展布范围。在此基础上，研究不同含油气系统的基本特征，深入剖析油气分布规律和主控因素，探讨未来盆地的油气勘探前景及重要勘探领域。研究表明，西纳土纳盆地发育4套含油气系统，Belut-Gabus/Arang/Belut （·）含油气系统和K/J-Arang （·）含油气系统是最重要的含油气系统，分别富集了盆地内46.1%和45.0%的油气可采储量。区域上，盆地的油气主要分布于Anambas地堑和Penyu次盆东部；层系上，油气主要储集于上渐新统和下中新统；油气藏类型上，油气富集于挤压背斜和披覆背斜等构造型油气藏中。油气分布规律的主要控制因素是主力烃源岩展布、区域盖层与油气运移路径、反转挤压和基底隆升运动。综合分析认为，Penyu-Penyu （·）含油气系统具有较大的勘探潜力，储层砂体预测和凹陷油气优势运移通道研究是该含油气系统的未来勘探重点。 |
| 关键词: 西纳土纳盆地 含油气系统 油气分布规律 主控因素 勘探前景 |
| DOI： |
| 附件 |
| 投稿时间：2018-02-11修订日期：2018-04-15 |
| 基金项目:中核集团集中研发项目（地LTD1601-4）；自然资源部油气资源战略中心“全国重点地区能源数据库建设项目”（1212011568801） |
|
| The analysis of the petroleum systems and exploration prospects in the West Natuna Basin in the South China Sea |
| NI Shiqi1, WANG Zhixin2,3, SONG Jiye1 |
(1. Beijing Research Institute of Uranium Geology, Beijing 100029, China;
2. State Key Laboratory of Petroleum Resources and Exploration, China University of Petroleum, Beijing 100029, China;
3. Center of Basin and Reservoir Research, China University of Petroleum, Beijing 100029, China) |
| Abstract: |
| The West Natuna Basin is an important petroliferous basin in the South China Sea. The division, distribution, controlling factors and exploration prospects of the major petroleum systems in the Basin are based on the tectonic-sedimentary evolution guided by the thought " from source to trap" in the study of petroleum systems. Four sets of petroleum systems are recognized, including the Belut-Gabus/Arang/Belut (·), K/J-Arang (·), Arang-Arang (!), and Penyu-Penyu (·) petroleum systems. The Belut-Gabus/Arang/Belut (·) and K/J-Arang (·) petroleum systems as the economically important petroleum systems in the West Natuna Basin make up of 46.1% and 45.0% of extractable oil and gas reserves. Regionally, the discovered oil and gas resources reside dominantly in the Anambas garben and the eastern part of the Penyu subbasin. Stratigraphically, they are largely reserved in the upper Oligocene and the lower Miocene strata, and structurally, generally trapped in the compressional anticlines and trap structures. The oil and gas distribution is largely controlled by effective source rocks, favourable regional cap rocks and migration pathways, compressional inversion and basement uplifting. It follows that the Penyu-Penyu (·) petroleum system has the great exploration potential, and the emphasis will be on the evaluation of the reservoir rocks and identification of favourable oil and gas migration pathways in this petroleum system in the depression. |
| Key words: West Natuna Basin petroleum system oil and gas distribution controlling factor exploration prospect |
