石油物探2018，Vol.57Issue(3)：356-361,418,7.DOI:10.3969/j.issn.1000-1441.2018.03.004
涪陵焦石坝三维工区高精度速度建场方法
High precision velocity field building in the Jiaoshiba 3D seismic survey area of the Fuling shale gas field
李忠平 1李以严 1周从业 1龙小军 1袁一平1
作者信息
- 1. 中国石油化工股份有限公司江汉油田分公司物探研究院,湖北武汉430035
- 折叠
摘要
Abstract
The structural description of shale gas reservoirs is relevant to the design precision of horizontal well trajectory.Building a high-precision velocity field is key for describing the subsurface structure in the depth domain using seismic data Based on the characteristics of the surface and underground seismic geology in the research area,a set of high-precision 3D velocity field building techniques was developed.The technique includes several process steps,namely,the velocity field transition from the time domain to the depth domain,interval velocity calculation based on layer model iteration,two-step interval velocity error trend surface construction based on horizon constraint,and average velocity field updating in real time while drilling.The results of application in the Jiaoshiba 3D seismic survey area of the Fuling shale gas field showed that the proposed technique could help improve the accuracy of variable velocity mapping and the design of horizontal well trajectory,improve the rate of drilling encountering high-quality shale gas formations,and improve drilling efficiency and reduce drilling costs.关键词
涪陵焦石坝页岩气田/叠加速度/均方根速度/平均速度场/CMP基准面/模型迭代/误差趋势面/水平井Key words
shale gas field in Jiaoshiba region of Fuling/stacking velocity/root-mean-squared velocity/average velocity field/CMP datum/model iteration/error trend surface/horizontal well分类
天文与地球科学引用本文复制引用
李忠平,李以严,周从业,龙小军,袁一平..涪陵焦石坝三维工区高精度速度建场方法[J].石油物探,2018,57(3):356-361,418,7.
