新疆石油地质 ›› 2020, Vol. 41 ›› Issue (5): 616-621.doi: 10.7657/XJPG20200517

• 应用技术 • 上一篇    下一篇

三维地质建模技术在致密砂岩油藏水平井开发中的应用——以鄂尔多斯盆地S区块为例

梁卫卫(), 党海龙, 崔鹏兴, 王小锋, 侯玢池, 张天龙   

  1. 1.陕西延长石油(集团)有限责任公司 研究院 油田开发研究所, 西安 710065
    2.陕西省特低渗透油气田勘探与开发工程技术研究中心,西安 710065
  • 收稿日期:2020-05-07 修回日期:2020-05-29 出版日期:2020-10-01 发布日期:2020-10-10
  • 作者简介:梁卫卫(1987-),男,陕西渭南人,工程师,硕士,油气田开发,(Tel)18629217532(E-mail)510741536@qq.com
  • 基金资助:
    陕西省科技统筹创新工程计划项目(2012KTZB01-04)

Application of 3D Geological Modeling in Horizontal Well Development of Tight Sandstone Oil Reservoirs: A Case Study of Block S in Ordos Basin

LIANG Weiwei(), DANG Hailong, CUI Pengxing, WANG Xiaofeng, HOU Fenchi, ZHANG Tianlong   

  1. 1. Oilfield Development Institute, Research Institute, Yanchang Petroleum (Group) Co. Ltd., Xi’an, Shaanxi 710065, China
    2. Shaanxi Ultra-low Permeability Oil and Gas Exploration and Development Engineering Research Center, Xi’an, Shaanxi 710065, China
  • Received:2020-05-07 Revised:2020-05-29 Online:2020-10-01 Published:2020-10-10

摘要:

为有效提高鄂尔多斯盆地南部致密砂岩油藏水平井钻井精确度及成功率,以三维地质建模技术下的构造模型、岩相及属性参数模型、储集层构型模型和自然伽马体模型为基础,进行水平井轨迹设计及随钻跟踪调整,并在盆地南部S区块长8油层组进行了现场试验。结果表明:储集层构型模型、自然伽马体模型等可有效表征目的层砂体的展布规律,定量指导水平井的轨迹设计;钻进过程中通过随钻自然伽马数据的验证分析,及时对水平井轨迹做出调整,确保水平段始终贯穿于最优砂体储集层中;3口现场试验的水平井均顺利完钻,平均砂体钻遇率为98.5%,平均有效储集层钻遇率为90.3%,投产后取得了显著的开发效果。采用三维地质建模技术可有效指导水平井轨迹设计及随钻跟踪调整,为鄂尔多斯盆地致密砂岩油藏水平井钻井及开发提供一定的借鉴。

关键词: 鄂尔多斯盆地, 延长组, 致密砂岩油藏, 三维地质建模, 储集层构型模型, 水平井, 轨迹设计, 随钻跟踪调整

Abstract:

In order to effectively improve the accuracy and success rate of drilling horizontal wells in tight sandstone oil reservoir in the southern Ordos basin, 3D geological modeling technology involving the geological structure, lithofacies, reservoir properties and configuration and GR curve of the Chang 8 member was based to design horizontal well trajectories and make adjustment while drilling in the S block. The results show that reservoir configuration model and natural gamma model can effectively characterize the distribution law of the sandbody in the target zones, and quantitatively support the design of horizontal well trajectories. The horizontal trajectories could be adjusted in time with the help of LWD GR data, so the horizontal sections could be always kept through the reservoirs with good physical properties. Three horizontal wells have been completed successfully at a drill-in rate of 98.5% in reservoirs and 90.3% in pay zones, and the post-fracturing production is high after putting into production. 3D geological modeling can effectively support the design and adjustment of horizontal well trajectories. The experience is of referential significance for drilling horizontal wells and development of the tight oil reservoirs in the Ordos basin.

Key words: Ordos basin, Yanchang formation, tight sandstone reservoir, 3D geological modeling, reservoir configuration model, horizontal well, trajectory design, adjusting while drilling

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