蜀南地区二叠系火成岩特征及储集性研究

为探索蜀南地区火成岩地质特征与勘探潜力,从研究区野外露头、岩心、岩屑、测录井以及地震等资料入手,对火成岩岩性、岩相、储层特征及其分布进行分析.研究结果表明:蜀南地区火成岩主要发育玄武岩与凝灰岩,玄武岩由南西向北东逐渐减薄至尖灭,凝灰岩则在犍为一带最为发育;岩相主要为溢流相与爆发相,在每种相带的不同纵向区域发育构造缝、溶...

Study on the Characteristics and Reservoir Quality of Permian Igneous Rocks in Southern Sichuan Basin

In order to find out the geological characteristics and exploration potential of igneous rocks in the Southern Sichuan Basin, the lithology, lithofacies, reservoir characteristics and distribution of igneous rocks were analyzed according to the field outcrops, cores, cuttings, logging and seismic data in the study area. The results showed that the igneous rocks in the Southern Sichuan Basin mainly developed basalt and tuff, the basalt was gradually thinning out from southwest to northeast, and the tuff was most developed in Qianwei County; lithofacies were mainly overflow and explosive facies, and unique reservoir spaces such as tectonic fractures and denudation pores were developed in different vertical areas of each facies belt; the reservoirs mainly included dissolved tuff reservoir and fractured basalt reservoir, which were developed in the upper section of explosive facies and the fracture area of overflow facies. The study results provide technical support for the further study of igneous rocks in the Southern Sichuan Basin and have guiding significance for the sustainable exploration and development in the Southern Sichuan Basin.