新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (6): 710-713.

• 油气勘探 • 上一篇    下一篇

盐城凹陷断层封闭性

马洪1, 柳广弟2, 詹宁3, 朱立林4, 石金华4   

  1. 1.中国石油 石油勘探开发科学研究院, 北京 100083;
    2.中国石油大学 资源与信息学院, 北京 102249;
    3.中国石油 吐哈油田分公司 钻井三公司, 新疆 鄯善 838200;
    4.中国石油 青海油田分公司 采油一厂开发室, 青海 敦煌 816400
  • 收稿日期:2006-12-28 出版日期:2007-12-01 发布日期:2020-08-03
  • 作者简介:马洪(1978-), 男, 山东莱阳人, 博士, 石油地质,(Tel) 13513067247(E-mail) ma11031@163.com.
  • 基金资助:
    国家重点基础研究发展规划“973”项目, 天然气藏动态形成过程和富集程度(2001GB209103)资助

Study and Evaluation of Fault Sealing in Yancheng Sag

MA Hong1, LIU Guang-di2, ZHAN Ning3, ZHU Li-lin4, SHI Jin-hua4   

  1. 1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    2. Institute of Geo-Resources and Information, China University of Petroleum, Beijing, 102249, China;
    3. No. 3 Drilling Company, Tuha Oilfield Company, PetroChina, Shanshan, Xinjiang 838200, China;
    4. Department of Development, No. 1 Production Plant, Qinghai Oilfield Company, PetroChina, Dunhuang, Qinghai, 816400, China
  • Received:2006-12-28 Online:2007-12-01 Published:2020-08-03

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摘要： 盐城凹陷断裂发育,断层封闭性评价具有一定的难度。根据前人的研究方法,结合实际地质情况,选取典型断层——盘1断层、盐3断层,应用泥岩涂抹系数建立该区断层侧向封闭性的评价标准值为1.26,根据泥岩塑性变形及破裂所能承受的最大正压力建立断层垂向封闭性有效正压力,区间为10～22MPa.通过对盐城凹陷主要断层的封闭性进行综合评价发现,该区断穿基底——阜一段的断层封闭性具有明显的分区性特点:南部断层封闭性较好,北部断层封闭性差,封闭断层的特征各不相同,与实际地质情况相吻合。

关键词: 盐城凹陷, 断层封闭性, 泥岩涂抹系数, 断面正压力, 地震层速度

Abstract: Yancheng sag is characterized by developed faults, which has influenced the fault sealing evaluation. According to previous studies, integrated with real geologic conditions, Pan-1 and Yan-3 faults are taken as typical faults to develop the criterion for fault lateral sealing evaluation. Using the mud smear coefficient, the criterion is given by 1.26. According to the sustain maximum normal pressure of mud plastic distortion and cracking, the effective normal pressure of fault vertical sealing ranges from 10 MPa to 22 MPa. The study shows that the sealing of fault penetrating into the basement (Member Fu-1) in Yancheng sag is characterized by regions: the south area is better, the north area is worse, such a varied feature is accordant with the real geologic situation.

Key words: Yancheng sag, fault sealing, mud smear coefficient, fault-section normal pressure, seismic interval velocity

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