体控建模技术在水平井设计及地质导向中的应用

The application of body-control modeling technology to horizontal well design and geological steering

目前应用相控建模方法建立沉积岩气藏地质模型已经比较成熟,但对于火山岩气藏,单一相控建模方法还存在一定的局限性。因此,针对长岭气田叠置火山岩单体控藏特征,从"体控"角度入手,综合应用边界点加密投影校正、变方位角、加权平均及分体局部网格加密等方法建立三维地质模型,有效解决了火山岩气藏叠置关系、构造异常散点、连通性及分辨率等建模难题。并将体控建模技术应用于水平井设计及导向,实现了水平井钻井轨迹的三维调控,能够有效提高水平井气层钻遇率。

The technology of using phase model to establish sedimentary geology model has become mature,but for volcanic gas reser-voir,the single phase modeling method still has limitation.Therefore,in view of the overlying volcanic single control characteristics in Changling gas field,the authors,from the perspective of ＆quot;volume control＆quot;,used boundary point encryption projection correction,varied azimuth,weighted average and local grid encryption technology to establish three-dimensional geological model which could effectively solve the modeling problems such as the volcanic gas superimposed relationship,structure abnormal point,communication and resolu-tion.This body control modeling technique was applied to horizontal well design and geo-steering,and realized the three-dimensional trajectory control,which can effectively improve the ratio of gas drilling in horizontal well.