Source Rock Evaluation and Hydrocarbon Generation Model of a Permian Alkaline Lakes—A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin

The alkaline lake source rocks of the Fengcheng Formation are developed in Mahu Sag Junggar Basin. Different from traditional continental fresh water and saltwater rocks, lack targeted evaluation criteria, it is unknown whether their hydrocarbon generation models consistent with models. Therefore, present study, standards discussed based on geological organic geochemical data a systematic summary characteristics rocks. mainly diamictite mixed argillaceous rock dolomite; most total carbon (TOC) values range 0.2–1.4%; kerogen primarily oil-prone type II, reaching low- to high-maturity stages. Based types matter relationships between abundance parameters, standard proposed. composed good excellent (55.5%) high potential. single-peak model similar that freshwater or lakes, rate, two five times model; its main particularity formation naphthenic crude oil bacteria algae. A new understanding potential can provide support for tight shale exploration Sag.