石油学报 ›› 2001, Vol. 22 ›› Issue (4): 35-38.DOI: 10.7623/syxb200104007

• 地质勘探 • 上一篇    下一篇

长庆气田奥陶系古沟槽展布及其对气藏的控制

何自新, 郑聪斌, 陈安宁, 王飞雁   

  1. 中国石油长庆油田公司 陕西西安 710021
  • 收稿日期:2000-03-27 修回日期:2000-06-22 出版日期:2001-07-25 发布日期:2010-05-21
  • 作者简介:何自新,男,1943年10月生,1969年毕业于北京地质学院,现任长庆油田公司副总经理,教授级高工

DISTRIBUTIVE CONFIGURATION OF ANCIENT VALLEY-TROUGH ON ORDOVICIAN EROSION SURFACE IN CHANGQING GAS FIELD AND ITS CONTROL OVER GAS ACCUMULATIONS

HE Zixin   

  1. Changqing Oil Field Company, CNPC, Xi'an 710021, China
  • Received:2000-03-27 Revised:2000-06-22 Online:2001-07-25 Published:2010-05-21

摘要: 鄂尔多斯盆地奥陶系古风化壳已找到的天然气田,属于大型古地貌气藏.其含气面积与奥陶系侵蚀面古沟槽展布密切相关.本文结合气田勘探开发实践,分析了古沟槽形成条件,提出了古沟槽判识方法.根据已识别出的古沟槽发育特征,指出主沟槽展布的总趋势主要为近东西向,改变了以往南北向展布的认识.并通过古沟槽与气藏分布关系,预测了扩大气田含气面积的主要目标区.

关键词: 鄂尔多斯盆地, 奥陶系侵蚀面, 古沟槽, 展布特征, 溶丘块体, 气藏分布

Abstract: The gas field having been found in Ordovician palaeocrust of Ordos Basin is large ancient landform gas accumulations and its gas containing area is closely related to distributive configuration of ancient valleytrough on Ordovician erosion surface.In combination with exploration and development of gas field,the methods of distinguishing ancient valley-trough is proposed after analysis of forming condition of ancient valleytrough.Based on characteristics of ancient valley-trough having been distinguished,it indicates that the general distributive trend of major ancient valley-trough is EW and not SN considered before.Through analyzing distributing relations of ancient valley-trough and gas accumulations,the authors forecaste major target area of expanding gas containing area of the gas field.

Key words: Ordos Basin, Ordovician erosion surface, ancient valley-trough, distributive characteristics, hilltype karst block, gas accumulations distribution

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