高分辨率伽马成像技术在地质导向中的应用

Application of High-resolution Gamma Ray Imaging Technology to Geosteering

陈鸣 马帅 张智凯

CHEN Ming MA Shuai ZHANG Zhikai

中海石油(中国)有限公司湛江分公司, 广东湛江 524057; 中国石油化工股份有限公司上海海洋油气分公司, 上 海 200120; 中海石油(中国)工程技术湛江实验中心, 广东湛江 524057

Zhanjiang Branch of CNOOC Ltd., Zhanjiang 524057, China; SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China; CNOOC Zhanjiang Laboratory Center, Zhanjiang 524057, China

随着地质导向技术在水平井施工中的广泛应用，除了长足发展边界探测等新技术，成像技术在随钻地质导向技术中的应用仍然是较为实用的技术之一。针对南海西部涠洲的油田项目构造变化大、地层倾角不确定性高的区块，便应用了高分辨率伽马成像技术并取得成功。高分辨率伽马成像能够实时提供清晰的伽马成像成果，据此提取精确的地层倾角，并在此基础上进行构造形态分析、落实，判断轨迹所处位置，从而为水平井施工实时决策提供有力的依据并指导地质导向，大大地降低了施工中的地质风险，提高了储层钻遇率。

With the wide application of geosteering technology to drilling of the horizontal well, logging imaging technology is still one of the practical technologies besides the rapid new developing technology such as boundary detection technology. High resolution gamma ray imaging technology has been used successfully in Weizhou oilfelds in the western part of South China Sea, which are complicated in structure and with great uncertainty in layer dip. High resolution gamma ray imaging technology can provide a clear gamma imaging results in real time, and extract accurate formation dip. On this basis, the morphological analysis can be constructed, and the location of the track can be determined. This technology can improve the effciency of real-time decision-making in drilling horizontal well and guide the geosteering, reduce substantially the geological risks and improve the encounter rate of reservoir.

https://doi.org/10.3969/j.issn.1008-2336.2016.04.071