Geology-engineering integration to improve drilling speed and safety in ultra-deep clastic reservoirs of the Qiulitage structural belt

The Qiulitage structural belt in Tarim Basin has a large reservoir burial depth and complex geological conditions. Challenges such as ultra-depth, high temperature, pressure stress lead to significant problems related well control safety project efficiency. To solve these key technical issues that set barriers the process of exploration development, drilling technology via integration geology engineering was established with geomechanics bridge. An integrated formed for improving speed ultra-deep wells, including location optimization, trajectory formation prediction before drilling, stratum drillability evaluation, bit speed-up tool design optimization. Combined seismic data, logging characteristics, lithology distribution rock mechanics data volume three-dimensional resistance characteristics block first time. longitudinal lateral heterogeneities were quantitatively characterized, providing basis design, improvement During process, geomechanical model corrected time according actual information, “three pressures” updated real support dynamic adjustment parameters. Through field practice, average complexity rate reduced from 18% 4.6%, cycle at 8,500 m 326 days 257 days, which comprised improvements compared vertical wells deployed early stage without considering geology-engineering integration. Cited as: Chen, C., Ji, G., Wang, H., Huang, Baud, P., Wu, Q. Geology-engineering improve clastic reservoirs belt. Advances Geo-Energy Research, 2022, 6(4): 347-356. https://doi.org/10.46690/ager.2022.04.09