A single-well data analysis of Rock-Eval and well logging of shale in the SX-1 well in the Qingshui sag, Western Depression, Liaohe Basin, Northeast China

摘要

The Western Depression of the Liaohe Basin to the north of Bohai Bay is petroliferous and of Eocene and Oligocene age. Understanding the geological features of hydrocarbon source rocks by analyzing Rock-Eval tests and well-logging data is important in unconventional resource exploration. It indicates that thermal evolution controls unconventional resource accumulation in the Qingshui sag. Relatively favorable sections are from Es-1 to the upper Es(3)1. No clear mathematical or functional relationship exists between welllogging data and the organic carbon content acquired from Rock-Eval. However, well-logging data has a statistical relationship with other geochemical scales at different levels, which can be used in assessing shale and mudstone as hydrocarbon source rock in this sag, and excludes the influence of tightly packed and heavy minerals in further drilling.