石油与天然气地质 ›› 2008, Vol. 29 ›› Issue (6): 769-773.doi: 10.11743/ogg20080610

• 油气勘探方法实践 • 上一篇    下一篇

塔里木盆地巴楚隆起同岗断裂封闭性综合评价

全裕科1,2, 丁文龙3, 余腾孝4, 黄太柱4   

  1. 1. 中国石油大学,北京 102249;
    2. 中国海洋石油股份有限公司,北京 100010;
    3. 中国地质大学 能源学院,北京 100083;
    4. 中国石油化工股份有限公司 西北油田分公司,新疆 乌鲁木齐 830011
  • 收稿日期:2008-06-10 出版日期:2008-12-24 发布日期:2012-01-16
  • 基金资助:

    国家重点基础研究发展规划(973)项目(2006CB202302);中国石化西部新区勘探指挥部项目(XBKY04-44-01)

Comprehensive evaluation of sealing ability of Tonggang fault in the Bachu uplift of the Tarim basin

Quan Yuke1,2, Ding Wenlong3, Yu Tengxiao4, Huang Taizhu4   

  1. 1. China University of Petroleam, Beijing 102249, China;
    2. China National Offshore Oil Co., Beijing 100010, China;
    3. Schoal of Energy Resoares, China University of Geosciences, Beijing 100083, China;
    4. Northwest Oilfield Company, SINOPEC, Urnmqi, Xingjiang 830011, China
  • Received:2008-06-10 Online:2008-12-24 Published:2012-01-16

摘要:

巴楚隆起西北部同岗断裂构造带发育了同岗断鼻和同岗南断背斜两个构造圈闭,但对圈闭的有效性尚存在疑虑,尤其是同岗断裂的封堵性直接影响着同岗构造圈闭的有效性。本文采用断裂两盘岩性的对置关系、断面图、泥岩涂抹系数、断层面压力计算等方法综合评价了同岗断裂的封闭性。结果表明:同岗断裂的侧向封闭性总体较差,垂向封闭性属于中等~较好,纵向上,断裂的深部(下奥陶统顶界以下地层)封闭性好于浅部;平面上,断裂南段好于北段,封闭性自南向北逐渐变差。

关键词: 封闭性评价, 同岗断裂, 巴楚隆起, 塔里木盆地

Abstract:

Two structural traps (the Tonggang fault nose and the southern Tonggang faulted anticline) were developed in the Tonggang fault belt of the northwest Bachu uplift.The effectiveness of these traps,however,is still uncertain.The sealing ability of the Tongang fault has a direct effect on the effectiveness of the Tonggang structural traps.It is comprehensively evaluated through study of formation juxtaposition across,fault,surface mapping,shale smear factor,and calculation of pressure on fault surface.The following understandings are obtained. The lateral sealing ability is relatively low as a whole,while the vertical sealing ability is moderate to fair.Vertically,the seal is better in the deeper part (below the top of the Lower Ordovician) than that in the upper part; while laterally,it is better in the southern segment of the Tonggang fault than that in its northern segment.

Key words: seal evaluation, Tonggang fault, Bachu Uplift, Tarim Basin

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