石油学报 ›› 2012, Vol. 33 ›› Issue (4): 601-609.DOI: 10.7623/syxb201204009

• 地质勘探 • 上一篇    下一篇

莺歌海盆地高温超压气藏控藏要素与成藏模式

谢玉洪 1 张迎朝 1,2 李绪深 1 朱建成 1 童传新 1,2 钟泽红 1 周家雄 1,2 何胜林 1   

  1. 1 中海石油有限公司湛江分公司 广东湛江 524057; 2 中国地质大学资源学院 湖北武汉 430074
  • 收稿日期:2011-10-19 修回日期:2012-03-13 出版日期:2012-07-25 发布日期:2012-08-01
  • 通讯作者: 谢玉洪
  • 作者简介:谢玉洪,男,1961年2月生,2005年获中国地质大学(武汉)理学博士学位,现为中海石油(中国)有限公司教授级高级工程师,长期从事海洋油气勘探、开发、生产科研和管理工作。
  • 基金资助:

    国家重大科技专项(2008ZX05023-04)资助。

Main controlling factors and formation models of natural gas reservoirs with high-temperature and overpressure in Yinggehai Basin

XIE Yuhong 1 ZHANG Yingzhao 1,2 LI Xushen 1 ZHU Jiancheng 1 TONG Chuanxin 1,2 ZHONG Zehong 1 ZHOU Jiaxiong 1,2 HE Shenglin 1   

  • Received:2011-10-19 Revised:2012-03-13 Online:2012-07-25 Published:2012-08-01

摘要:

南中国海莺歌海盆地上中新统黄流组一段高温超压、高产岩性气藏天然气成藏主控因素有3点:①重力流沉积优质储层;②气藏处于盆地东、西部物源交汇区西侧,上覆优质浅海相泥岩盖层;③气藏位于底辟构造外围,其下部存在沟通深部中中新统梅山组、下中新统三亚组超高压、高成熟烃源岩的断裂/裂隙系统。莺歌海盆地高温超压气藏成藏模式有2种:①岩性型,气藏分布于底辟背斜翼部、外围甚至向斜底部,圈闭形成早,气藏不受底辟构造控制;②背斜型,气藏分布于底辟背斜上,构造定形、天然气聚集受控于晚期的底辟活动,气藏受底辟构造控制。其中,岩性气藏储层孔渗好,规模大。

关键词: 高温超压, 气藏, 控藏要素, 成藏模式, 莺歌海盆地

Abstract:

There are three main factors that control the formation of productive lithologic gas-reservoirs with high-temperature and overpressure in the first member of the upper Miocene Huangliu Formation in Yinggehai Basin, South China Sea. These three factors are ①a gravity-flow driven sandstone reservoir with high quality; ②a gas-reservoir located in the west side of the eastern and western provenance conjunction and overlain by high-quality neritic-facies mudstones as the cap rock; and ③a gas-reservoir located in the diapir outskirt, under which there exists a fault/fissure system connecting with underlying overpressure high-maturity source rocks of the mid-Miocene Meishan Formation and lower Miocene Sanya Formation. High-temperature and overpressure gas reservoirs in Yinggehai Basin have two main gas-accumulating models, one is the lithologic pattern, in which gas reservoirs are distributed in wings and outskirts of the diapir anticline, even in the syncline base, and characterized by the earlier formation of lithologic traps that are consequently uncontrolled by diaper structures, and the other is the anticline pattern, in which gas reservoirs are distributed on the diapir anticline, formed by structures and consequently controlled by diapir structures. Compared with the structural gas reservoir,the lithologic gas reservoir is of good permeability, large-scale reserves and productive capacity.

Key words: high-temperature and overpressure, gas pool, controlling factor of accumulation, gas-accumulating model, Yinggehai Basin