赵海波,黄丛,乔卫,王团,李奎周,王宏强
ZHAO Haibo,HUANG Cong,QIAO Wei,WANG Tuan,LI Kuizhou,WANG Hongqiang

• 1:中国石油大庆油田有限责任公司勘探开发研究院
• 2:中国石油集团测井有限公司大庆分公司

摘要(Abstract)：

水平井钻井已经成为页岩油经济有效开采的主要手段，水平井导向技术是水平井钻井成功的关键技术。以往地质导向技术利用水平井实钻曲线与导眼井曲线拟合预测井底位置，结合地震预测钻井前方构造趋势变化，时间域地震无法直接预测出钻井前方构造倾角等参数，而深度域地震受速度的影响，常会出现地震预测井底所在层位与实钻层位不符的问题，无法及时更新深度域地震，影响水平井有效箱体钻遇率。为开展深度域地震-地质导向技术研究，满足页岩油大规模水平井勘探开发的需求，充分利用地震、测井以及现场实时钻井数据，建立地震地质导向模型，通过实钻曲线与导眼井曲线拟合调整导向模型，确定井底在地下准确位置，利用导向模型层位与地震解释层位匹配构建实时更新的速度场，自动更新深度域地震剖面。该技术解决了深度域地震导向，地震剖面无法及时更新问题，确保导向模型标志层位与深度域地震标志层位完全一致，提高了地震导向钻井前方构造倾角预测的准确性，在古龙页岩油导向中具有了较好的效果，已经完钻的55口水平井，一类箱体钻遇率达到97%。研究成果可推广到其他领域水平井导向过程中。
Horizontal well drilling is a main technique for economically and effectively producing shale oil, and horizontal well steering is a key technique for success of horizontal well drilling. Previous geosteering technique used actual drilling curve of horizontal well and pilot hole curve to fit and predict bottomhole position, combined with seismic prediction of structural trend changes ahead of drilling. Time domain seismic cannot directly predict parameters such as structural dip ahead of drilling, and depth domain seismic are affected by velocity, often resulting in the problem of seismic predicted bottomhole horizon not matching drilled horizon, and cannot update depth domain seismic in time, impacting effective compartments drilling encounter rate of horizontal wells. In order to study depth domain seismic-geosteering technique and to meet the needs of large-scale horizontal well exploration and development of shale oil, seismic-geosteering model is established by fully use of seismic, logging and on-site real-time drilling data. The steering model is adjusted by fitting actual drilling curve and pilot hole curve to determine accurate subsurface bottomhole position. Real-time updated velocity field is constructed by matching the steering model horizon with seismic interpreted horizon to automatically update depth domain seismic section. This technique solves the problem of inability to update seismic section by depth domain seismic steering in time, ensuring steering model marker horizons of completely consistent with depth domain seismic marker horizons. The technique improves the accuracy of predicting structural dip ahead of seismic-steering drilling, and achieves good results in steering of Gulong shale oil. 55 horizontal wells are drilled, with encounter rate of Class Ⅰcompartment reaching 97%. The research results of this technique can be popularized to other fields of horizontal well steering processes.

关键词(KeyWords)： 地震-地质导向技术;古龙页岩油;速度场;深度域;水平井
seismic-geosteering technique;Gulong shale oil;velocity field;depth domain;horizontal well

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司科技重大专项“陆相页岩油规模增储上产与勘探开发技术研究”（2023ZZ15）

作者(Author): 赵海波,黄丛,乔卫,王团,李奎周,王宏强
ZHAO Haibo,HUANG Cong,QIAO Wei,WANG Tuan,LI Kuizhou,WANG Hongqiang

DOI: 10.19597/J.ISSN.1000-3754.202404032

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