Abstract：In the central deeply-depressed area of Biyang sag in Nanxiang Basin, the organic shale was developed in semideep-deep lacustrine facies which were deposited in freshwater-saltwater environments. The lacustrine shale had various kinds of complex lithofacies, and changed quickly. Totally, it could be divided into argillaceous siltstone, silty shale, aphanitic calcareous shale, recrystallization calcareous shale and dolomitic shale. They were rich in organic matter, and offered a favorable material basis for continental shale oil. Biyang sag shale extended widely in large thickness, high content of organic matters and better organic matter types, appropriate thermal evolution degree,|high brittleness mineral content and petroliferous properties. Recent studies made it clear that Biyang sag had favorable formation conditions for shale oil. On this basis, the shale oil exploration and development technology were developed, including petrology analysis technology, geological multi-parameter comprehensive evaluation technology and the favorable zone evaluation technology. Moreover, the main controlling factors on the shale oil accumulation were determined and target area was predicted. The above research indicated that China's continental shale oil exploration had made significant breakthrough and demonstrated good exploration and development prospects of continental shale oil in China.
Wang Min,Chen Xiang,Yan Yongxin et al. Geological characteristics and evaluation of continental shale oil in Biyang sag of Nanxiang Basin[J]. JOPC, 2013, 15(5): 663-671.
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