探边工具AziTrak在开发井地质导向中的应用

Application of AziTrak Tool to Geosteering of Horizontal Well Development

探边工具AziTrak是贝克休斯公司新一代随钻电阻率测量工具,它能探测最远5 m范围内地层的导电边界,具有双边界探测能力。在南海LF13-2油田的开发过程中,开发井面临油藏构造边界不确定和动油水界面不确定的地质导向问题。阐述了探边工具AziTrak的仪器结构和基本探测原理,以LF13-2油田2口典型水平井为实例,利用探边工具AziTrak同时探测油藏顶部泥岩地层边界及底部水层的动油水界面,始终将井眼轨迹控制在距顶1 m的范围内,为油田高产稳产奠定了基础。

AziTrak with capability of detecting dual bed boundary is a new generation resistivity logging-while-drilling tool of Baker Hughes, it can detect boundary up to 5 m. In oilfield development of LF13-2 oilfield in South China Sea, geologists face challenges of geosteering in reservoir with uncertaint structures and uncertaint oil water contact. The structure and basic principle of the AziTrak tool are stated. Taking two typical horizontal wells in LF13-2 oilfield as examples, that AziTrak tool detects reservoir top shale boundary and bottom water boundary is introduced. Through the use of AziTrak tool, the well trajectory is always controlled within only 1 m away from the top shale, which provide foundation for high and stable yield in LF132 oil- field.