大港油田页岩油水平井地质导向技术研究与应用——以GD区块GD 2H井为例

Application of geosteering technology for shale oil horizontal wells in Dagang Oilfield:a case study on GD 2H well in GD block

GD区块为大港油田页岩油开发先导试验区,由于该区此前无导向经验可借鉴,且GD区块地质构造复杂,给水平井地质导向作业带来了困难。针对该区的地质构造、沉积特征及地质导向难点,以区块内GD 2H井为例,从入窗控制和水平段控制2个阶段系统阐述了整个导向过程,归纳了该区块页岩油水平井地质导向技术要点。在现场导向作业中,综合运用地质、地震、测井等资料进行地质建模与实时导向跟踪,最终储集层钻遇率达100%,现场应用效果突出,为大港油田同类页岩油水平井地质导向提供了第一手经验。

GD block is a pilot area for shale oil development in Dagang Oilfield.Because there was no guidance experience in this area before,and the geologic structure of GD block is complex,it brought difficulties to the geosteering operation of horizontal wells.In view of the geologic structure,sedimentary characteristics and difficult points of geosteering in this area,taking GD 2H well in the block as an example,the whole guiding process was systematically expounded from two stages of the control of landing in the window and horizontal section control.The key points of geosteering technology for shale oil horizontal wells in this block were summarized.In field guidance operation,geologic modeling and real-time guidance tracking were carried out by using geological,seismic and well logging data,and the final reservoir drilling rate reached 100%.Well site application is very effective,which provides first-hand experience for geosteering of similar shale oil horizontal wells in Dagang Oilfield.