歧口凹陷页岩油水平井轨迹优化技术  

Trajectory Optimization Technology of Shale Oil Horizontal Well in Qikou Depression

作　　者：郭淑文 周淑慧[1] 彭雪梅 邢兴 肖娟[1] Guo Shuwen;Zhou Shuhui;Peng Xuemei;Xing Xing;Xiao Juan(Research Institute of Exploration and Development, Dagang Oilfield of PetroChina, Tianjin 300280, China;Exploration Enterprise, Dagang Oilfield of PetroChina, Tianjin 300280, China)

机构地区：[1]中石油大港油田勘探开发研究院,天津300280 [2]中石油大港油田勘探事业部,天津300280

出　　处：《工程地球物理学报》2020年第3期291-299,共9页Chinese Journal of Engineering Geophysics

摘　　要：歧口凹陷沙一下页岩油厚度薄、地震资料分辨率低,需要研究高分辨率反演及水平井轨迹精确控制技术。通过岩性交会分析,采用敏感页岩岩性曲线重建及低频约束高分辨率构形反演技术,有效提高地震反演分辨率,识别出岩性及不同页岩油甜点体的空间分布,高分辨率预测结果符合细粒沉积岩的横向稳定分布的沉积规律。在此基础上,应用基于三维速度场建模的水平井轨迹空变时深转换技术,可精确计算水平井轨迹深度。实际应用效果表明,该技术可以有效减少水平井控制点的深度计算误差,提高钻井成功率。It is necessary to study high-resolution inversion and precise control technology of horizontal well trajectory owing to the thinness of shale oil and low resolution of seismic data in the S1 lower part of Qikou depression.Analysing lithological intersection,this paper adopts sensitive shale lithological curve reconstruction and low-frequency constrained high-resolution configuration inversion technology to effectively improve the resolution of seismic inversion,and identify lithology and the spatial distribution of different shale oil desserts.The prediction results with high resolution are consistent with the deposition rule of pulveryte in lateral stable distribution.On the basis of three-dimensional velocity field modeling,the horizontal well trajectory spatial varying time-depth conversion technology can be used to accurately calculate the horizontal well trajectory depth.The actual application results show that this technology can effectively reduce the depth calculation error of the horizontal well control points and improve the success rate of drilling.

关 键 词：页岩油 甜点体 储层预测 高分辨率反演 空变速度曲线 

分 类 号：P631.8[天文地球—地质矿产勘探]