ABSTRACT
The oil-water transition zone in the eastern part of the Sazhong Development Zone is located on the eastern flank of the anticline in the Sartu Oilfield, among them, three to four Sartu oil layers are sand-mudstone interbeds deposited by rivers and deltas in large inland lake basins, and the oil layer heterogeneity is more serious. To tap the remaining oil in the submerged area, our plant has deployed 24 horizontal wells in the SII1 and SII2 formations The predicted thickness of the target oil layer is generally about 1.0–2.0 m, thinly developed, It is difficult to control the trajectory to extend in the reservoir, our factory through exploration and practice in the process of tracking while drilling, developed a practical approach to design and tracking of horizontal wells. Application and cooperation of various technologies on-site have increased the oil layer drilling rate of horizontal wells to more than 80%, the success rate is over 90%, and it provides technical support for guiding the potential tapping of horizontal wells in the future.
