PetroChina â Xinjiang made an important breakthrough in the Junggar Basin. Qianshao 2, a NFW, tested 7.18 MMcf/d of gas plus 280 b/d of oil (likely condensate) from the Jurassic Sangonghe Formation on 9 June 2019.   The well was drilled in the northeast slope of the Shawan Sag. There are several small-medium size oil and gas fields found on local structure highs in this area, such as Mosuowan gas field, Mobei and Shixi oil and gas fields, which has main reservoir in the Sangonghe Formation.Â  Qianshao 2 is the first well which makes a breakthrough down to slope area and it indicates a significant potential prospective for gas exploration.   In December 2018, PetroChina made a new oil discovery in Shatan 1. The well tested 190 b/d of oil from 5,344 to 5,375 m in the Permian Wuerhe Formation. Shatan 1 is drilled in the northwest Shawan Sag. The well also encountered good oil shows in other formations during drilling, such as Triassic Baikouquan and Karamay formations. The success of the well indicated a new exploration potential prospective area for the Wuerhe play fairway.Â Â Â  Â   Background Information   Jurassic formations are important reservoir in the Junggar Basin. The Sangonghe Formation reservoirs are dominated by fluvial and deltaic sandstones. Good quality reservoirs have been identified in the Sangonghe Formation.    Reservoirs of the Jurassic Series are widespread in the basin, holding about 30% proven oil reserves and 49% proven gas reserves. These reservoirs are characterized by coal-bearing strata. Reservoirs include clastics of the Lower Jurassic Badaowan and Sangonghe formations, Middle Jurassic Xishanyao and Toutunhe formations, and Upper Jurassic Qigu Formation, and coals of the Badaowan and Xishanyao formations. In general, reservoirs of the Toutunhe and Sangonghe formations have better reservoir quality than those of the Xishanyao and Badaowan formations.
Qianshao 2 NFW (PetroChina â Xinjiang 100%) made an important breakthrough in the area, tested 7,18 MMscf/d of gas plus 280 b/d of oil (likely condensate) from the Jurassic Sangonghe Fm. The well was drilled in the northeast slope of the Shawan Sag.