01649nab a2200241 4500 20260520000321.0 260224s2016 xxu ing Inglés Overpressure compartments in the central paleo-uplift, Sichuan Basin, southwest China mayo 2016 11/07/2016 ; 05/07/2016 21 p. ; 867-888 Transcripción del resumen del autor: The Sichuan Basin is a prime gas-producing basin in China. Besides the giant Neoproterozoic Weiyuan gas field discovered in the central paleo-uplift, an extra giant gas reservoir in the Cambrian in this area has been confirmed in recent years. Although the lower Paleozoic in the southwest (Weiyuan area) is normally pressured, it is overpressured in the central area (Moxi–Gaoshiti area). Combined with the seal distribution, five pressure systems, including three overpressure systems, can be divided based on drill-stem test, mud weight, and sonic transit time data. Overpressures appear at depth interval of 1500 to 4900 m (4921 to 16,076 ft), approximately. Benefiting from the good sealing capacity of the gypsum in the Upper and Middle Triassic, high overpressure (pressure coefficient [r] > 2.0) has been preserved in the Lower Triassic, and the Upper Triassic and Cambrian are moderately overpressured (1.3 r 5 AAPG Bulletin 100 ARTICULO Liu, Yifeng 55428 Qiu, Nansheng 50031 Xie, Zengye 55429 Yao, Qianying 55430 Zhu, Chuanqing 55431 189624 189624 0 0 0 0 257443 BAAB BAAB 2026-03-06 200061848 0 200061848 2026-03-06 00:19:47 2026-03-06 ARTICULO