Shale oil and gas are among the more strategic oil and gas replacement resources in China. The second and third members of the Paleogene Liushagang Formation in the western South China Sea are primary source rocks featuring multiple mature laminated shale and sand oil reservoirs. The authors applied a shale-oil-evaluation method based on sandstone wireline-formation-testing (WFT) data.
Introduction
Weizhou shale oil in the Beibu Gulf of the South China Sea regionally occurs in a large fault block formed by the northeast- and northwest-trending faults, including the east, middle, and west blocks. From bottom to top, it is developed with the Liu 3 member early-stage and late-stage laminated shale-oil reservoir of the upper-sequence lake intrusion, and the Liu 2 member early-stage sandwich-type shale oil, the middle-stage laminated shale oil, and the late-stage matrix shale oil of the lower-sequence lake intrusion.
