Objective
Deep-water deposit has become one of the greatest potential and economic areas for petroleum exploration.In the western Qaidam Basin, the deep-water sedimentary area account for nearly 2/3 of the basin area, but the related reports is less.Scholars generally believed that the salt water medium can inhibit the extension of the sand (Qian et al., 1984).Therefore, the sand in the lacustrine area was lacking, and for the deep-water carbonate area, it was considered as a “biological desert”(Warren, 2016).