石油学报 ›› 2010, Vol. 31 ›› Issue (3): 373-378,385.DOI: 10.7623/syxb201003005

• 地质勘探 • 上一篇    下一篇

鄂尔多斯盆地北部大牛地气田成岩成藏耦合关系

杨  智 1,2  何  生 2  邹才能 1  李奇艳 1  陈召佑 2,3   

  1. 1   中国石油勘探开发研究院提高石油采收率国家重点实验室  北京  100083; 2   中国地质大学构造与油气资源教育部重点实验室  湖北武汉  430074; 3   中国石油化工股份有限公司华北分公司勘探开发研究院  河南郑州  450006
  • 收稿日期:2009-08-21 修回日期:2009-12-23 出版日期:2010-05-25 发布日期:2010-07-28
  • 通讯作者: 杨 智
  • 作者简介:杨 智,男,1980年2月生,2009年获中国地质大学(武汉)博士学位,现为中国石油勘探开发研究院在站博士后,主要从事石油地质综合研究工作。
  • 基金资助:

    国家科技重大专项(2008ZX05001)、国家示范工程项目(2008ZX05044)和中国石油天然气股份有限公司科技开发项目(2008B-0100)联合资助。

Coupling relationship between reservoir diagenesis and natural gas accumulation of Daniudi Gas Field in North Ordos Basin

YANG Zhi 1,2   HE Sheng 2   ZOU Caineng 1   LI Qiyan 1   CHEN Zhaoyou 2,3   

  • Received:2009-08-21 Revised:2009-12-23 Online:2010-05-25 Published:2010-07-28

摘要:

鄂尔多斯盆地北部大牛地气田上古生界含气层系多,储量规模大,是一个典型的大型煤成气田。对源岩及天然气地化特征、源岩热演化模拟、储层岩石学、成岩演化及相关成藏要素的综合研究表明,大牛地气田具有“两个生气中心,储层致密化前后分明,早期侧向运移,晚期垂向充注”的成藏模式,形成了研究区内两种不同类型的气藏,即西南角的盒2段和盒3段辫状河道砂体储层气藏和东北角的太2段障壁砂坝储层气藏,生气中心和储层致密化对上古生界天然气成藏有着重要的控制作用。

关键词: 鄂尔多斯盆地, 大牛地气田, 上古生界, 天然气成藏模式, 致密砂岩, 煤成气

Abstract:

Daniudi Gas Field is a typical and large coal-genetic gas field in North Ordos Basin and has the characteristics of multiple gas-bearing layer series and large-scale explored reserves in Upper Palaeozoic reservoir. The comprehensive analyses on the geochemistry characteristics of source rocks and natural gas, thermal evolution modeling results of source rocks, reservoir petrology, diagenesis evolution and other gas accumulation elements show that Daniudi Gas Field possesses a special gas accumulation model controlled by two gas generating centers and the tightening processes of sandstone and divided by the tightening time of sandstone termination. There developed two kinds of gas reservoir in Daniudi Gas Field. Prior to the tightening time of sandstone termination, the lower maturation gas migrated to the higher traps in large scale under the force of buoyancy and formed the T2 barrier bar facies gas reservoir in the Northeast. Then, the high-maturation gas migrated upward in the fracture systems under the force of gas-generating overpressure and formed H2 and H3 braided channel facies gas reservoir in the Southwest. The gas accumulation center and tightness of sandstone controlled the natural gas accumulation of Upper Palaeozoic reservoir in North Ordos Basin.

Key words: Ordos Basin, Daniudi Gas Field, Upper Palaeozoic, natural gas accumulation model, tight sandstone, coal-genetic gas