岩性油气藏 ›› 2017, Vol. 29 ›› Issue (4): 11–19.doi: 10.3969/j.issn.1673-8926.2017.04.002

• 油气地质 • 上一篇    下一篇

鄂尔多斯盆地西南部长7深水浊积特征与储层发育

王建民1, 王佳媛2,3   

  1. 1. 西安石油大学 地球科学与工程学院, 西安 710065;
    2. 中国科学院地球环境研究所气溶胶化学与物理重点实验室, 西安 710061;
    3. 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室, 西安 710061
  • 收稿日期:2016-09-13 修回日期:2016-11-10 出版日期:2017-07-21 发布日期:2017-07-21
  • 第一作者:王建民(1962-),男,博士,教授,主要从事沉积、储层、油气成藏及开发地质等方面的教学与科研工作。地址:(710065)陕西省西安市雁塔区电子二路东段18号西安石油大学地球科学与工程学院。Email:wangjm@xsyu.edu.cn。
  • 基金资助:
    陕西省自然科学基金项目“陕北中生界延长组特低渗低阻油层识别与评价”（编号：2010JM5003）与“连续型油藏砂岩疏导体系与石油运移时效性探讨”（编号：2013JM5006）及西安石油大学青年科技创新基金项目“鄂尔多斯盆地伊陕斜坡上的低幅度构造与油气成藏特征研究”（编号：2012BS010）联合资助。

Deep-water turbidite characteristics and its reservoir development of Chang 7 oil layers in southwestern Ordos Basin

WANG Jianmin1, WANG Jiayuan2,3   

  1. 1. School of Earth Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China;
    2. Key Laboratory of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China;
    3. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
  • Received:2016-09-13 Revised:2016-11-10 Online:2017-07-21 Published:2017-07-21

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摘要： 为了进一步探讨深水湖盆储层成因及油气勘探潜力问题，依据录井、测井、实验及试采等资料，对鄂尔多斯盆地西南部LM井区长7油层组深水浊积相的发育特征及其对储层发育的影响进行了研究。结果表明， LM井区长7油层组自上而下可划分为3个亚油层组和4个小层，下部长73亚油层组发育大套油页岩，中上部长72和长71亚油层组发育大套浊积岩和典型的鲍马序列，构成了一个完整的深水浊积层序，且可划分出浊积中扇、浊积下扇及深水盆地共3个亚相，以及浊积水道、水道间漫流、水道前缘漫流、浊积末梢、泥页岩及油页岩等6个沉积微相。该大型浊积扇体以浊积中扇为主体，且受西南单一物源及水系控制，砂体的连续性、连通性及复合性均较好，成为长7深水有效储层发育的主要成因类型；油气显示及产能良好，勘探开发潜力较大，是深水相区油气勘探开发的有效目标。

关键词: 油藏带, 空间展布, 沉积特征, 布曲组, 南羌塘坳陷

Abstract: Aiming at the genesis of the deep-water reservoir in lacustrine basin and the potential of petroleum exploration, the deep-water turbidite characteristics and its influence on the reservoirs development of Chang 7 oil layers in LM well field in the southwestern Ordos Basin were studied according to logging,testing,experiments and producing test data, based on single well facies and logging facies analysis. The results show that Chang 7 oil layers can be divided into three sub oil layers and four sub-layers. Chang 73 sub oil layers in the lower Chang 7 developed a large set of oil shale,and Chang 72 and Chang 71 sub oil layers in the middle and upper Chang 7 developed a large set of turbidite and typical Bouma sequence,all of which constituted a complete deep-water turbi-dite facies sequence. The sedimentation can be sequentially divided into three subfacies including turbidite middle fan, turbidite lower fan and deep-water basin, as well as six microfacies types including turbidite channel, interchannel overflow,front channel overflow, turbidite endings, mud shale and oil shale. This large deep-water turbidite fan is dominated by turbidite middle fan and controlled by the southwest provenance and drainage system,with good sandbody continuity,connectivity and composition,and became the major genetic types for Chang 7 effective deep-water reservoir. With good oil show,and great exploration potential, the turbidite fan is an effective prospect for petroleum exploration on deep-water sediments.

Key words: oil reservoir zones, spatial distribution, sedimentary characteristic, Buqu Formation, southern Qiangtang Depression

中图分类号: 

  • TE111.3
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