Dolomitic Reservoirs Prediction of Lower Permian In Fengcheng Area, Junggar Basin

The sedimentary environments of “f” formation (Lower Permian), in Fengcheng area of Junggar basin, Xingjiang, China is dominantly volcano-related lacustrine facies, and the lithology is a combination of carbonate, siliciclastic and volcanic rocks which provide several important unconventional reservoirs for the oil and gas accumulation. The weathered tuff is the most common reservoir with oil production varying from several to dozens tons per well per day, while the fractured dolomite, although highly heterogeneous, is the most productive facies with up to 150 tons oil equivalent per well per day. The purpose of this paper is to determine the distribution of these two types of reservoir facies and develop appropriate approaches for predicting the dolomitic reservoirs.