天然气地球科学

• 天然气地质学 • 上一篇    下一篇

南八仙油气田成藏机理再认识

颉永琛,关平,杨国军,保吉成   

  1. 1.北京大学地球与空间科学学院,北京 100871;
    2.中国石油青海油田分公司,甘肃 敦煌 736202
  • 收稿日期:2011-11-19 修回日期:2012-08-10 出版日期:2012-10-10 发布日期:2012-10-10
  • 通讯作者: 颉永琛xieysqh@petrochina.com.cn E-mail:xieysqh@petrochina.com.cn
  • 作者简介:颉永琛(1970-),男,甘肃甘谷人,高级工程师,在读硕士,主要从事油藏地质研究和油田开发管理工作. E-mail:xieysqh@petrochina.com.cn.

Reanalysis of Reservoir Accumulation Mechanism in Nanbaxian Oil-gas Field

XIE Yong-chen,GUAN Ping,YANG Guo-jun,BAO Ji-cheng   

  1. 1.School of Earth and Space Sciences,Peking University,Beijing 100871,China;
    2.PetroChina Qinghai Oilfield Company,Dunhuang 736202,China
  • Received:2011-11-19 Revised:2012-08-10 Online:2012-10-10 Published:2012-10-10

摘要:

南八仙复杂断块油气田,其油气藏富集受构造、断层、岩性等多重因素的控制。深层E13气藏为原生高压气藏,且以凝析气藏为主;中浅层N1—N22气藏为次生正常压力油气藏,油气藏类型复杂多样。参考近期区域勘探研究成果,试采开发动态资料,分析了南八仙“上油下气、以气为主”的成藏规律,认为E13气藏为2期充注,构造相对完整,圈闭保存条件好,形成异常高压原生气藏;E23原生油气藏受到后期仙北大断层的破坏,油气向浅层运移聚集;N1—N22油气藏为断层、岩性圈闭的产物,一期充注,属正常压力的次生油气藏,油气主要富集于圈闭条件较好的仙北大断层的下盘。

关键词: 南八仙油田, 成藏机理, 复杂断块油田

Abstract:

The hydrocarbon concentration of Nanbaxian oil-gas field which is complex fault block reservoirs are controlled by many factors such as structure,fault,lithology,and so on.The oil-gas field has a variety of reservoiring schema,while the deep E13  strata composed a native high-pressure gas reservoir and the middle-shallow N1-N22 strata composed a secondary normal-pressure oil-gas reservoir.Based on the latest exploration results and dynamic exploitation data this paper analyzed the reservoir accumulation pattern of “oil in upper strata and gas in lower strata” and reached following conclusions:The E13 gas reservoir,which was formed by the second period of injection,is an abnormally high-pressure protogene reservoir with good trapping conditions;The protogene E23 reservoir was destroyed by Xianbei fault formed during later period,which allowed the migration of hydrocarbon to upper strata;The N1-N22reservoir was the result from effects of faults and lithology,which was a normal-pressure secondary oil-gas reservoir and formed by the first period of injection.The conclusions have directive significances to the exploitation of Nanbaxian oil-gas field.

Key words: Nanbaxian oil-gas field, Mechanism of reservoir accumulation, Complex faulted reservoir

中图分类号: 

  • TE122.3

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