Reservoir characteristics, formation mechanisms and petroleum exploration potential of volcanic rocks in China

• Published in: Petroleum science 2015-03, Vol.12 (1), p.54-66
• Main Authors: Mao, Zhi-Guo, Zhu, Ru-Kai, Luo, Jing-Lan, Wang, Jing-Hong, Du, Zhan-Hai, Su, Ling, Zhang, Shao-Min
• Format: Article
• Language: English
• Subjects: Earth and Environmental Science; Earth Sciences; Economics and Management; Energy Policy; Industrial and Production Engineering; Industrial Chemistry/Chemical Engineering; Mineral Resources; Original Paper; 中国石油; 储层开发; 储层特征; 储集空间类型; 勘探潜力; 形成机理; 新生代火山岩; 次生孔隙
• ISSN: 1672-5107; 1995-8226
• DOI: 10.1007/s12182-014-0013-6

Characterized by complex lithology and strong heterogeneity, volcanic reservoirs in China developed three reservoir space types： primary pores, secondary pores and fractures. The formation of reservoir space went through the cooling and solidification stage （including blast fragmentation, crystallization differentiation and solidification） and the epidiagenesis stage （including metasomatism, filling, weathering and leaching, formation fluid dissolution and tectonism）. Primary pores were formed at the solidification stage, which laid the foundation for the development and transformation of effective reservoirs. Secondary pores were formed at the epidiagenesis stage, with key factors as weathering and leaching, formation fluid dissolution and tectonism. In China, Mesozoic-Cenozoic volcanic rocks developed in the Songliao Basin and Bohai Bay Basin in the east and Late Paleozoic volcanic rocks developed in the Junggar Basin, Santanghu Basin and Ta- rim Basin in the west. There are primary volcanic reser- voirs and secondary volcanic reservoirs in these volcanic rocks, which have good accumulation conditions and great exploration potential.