中国非常规油气沉积学新进展

经过近20年不断探索，中国陆上非常规油气勘探开发取得了重大进展。2019年全国非常规油气产量占油气总产量的23%，2020年非常规油气产量接近7 000万吨油当量，标志着中国进入非常规油气革命发展新阶段。非常规油气沉积学作为非常规油气地质学理论体系的重要组成部分之一，受到越来越多的关注和重视，形成了“陆相深水砂质碎屑流等重力流沉积模式”、“海陆相富有机质页岩沉积模式”、“细粒沉积岩发育微纳米级孔喉系统”、“多地质事件沉积耦合形成非常规油气甜点区（段）”等重要认识。专辑主要是由从事非常规油气相关的沉积学专家对中国近几年非常规油气层系沉积研究新进展的系统性和及时性总结，内容涵盖了鄂尔多斯、四川、松辽、渤海湾、准噶尔等近50个大中型及中小型含油气盆地，地层时代跨度自元古代至新生代，涉及致密油/页岩油、页岩气、致密气、煤层气、油页岩油等非常规油气层系（段）近30个。这些研究成果为我国非常规油气资源勘探开发提供了重要理论基础与技术支撑。提出未来非常规油气沉积学需以非常规油气工业开发的“甜点箱体”和“甜点群”为重点研究方向，指导非常规油气资源高效勘探开发。

Preface: New advances in unconventional petroleum sedimentology in China

Significant progress has been gradually made on the exploration and development of unconventional petroleum on land in China over the past 20 years.In 2019,unconventional petroleum production in China accounted for about 23%of the total oil and gas production that year and reached 70 million tons of oil equivalent in 2020,indicating China’s petroleum industry has entered a new stage of unconventional petroleum development.Unconventional petroleum sedimentology as an important part of unconventional petroleum geology,and the theoretical system has been gained more and more attention over recent years,leading to important studies,such as“Depositional model of gravity flows,sandy debris in a deep lacustrine basin”,“Depositional model of marine and/or lacustrine organic-rich shale”,“Abundant micro-and nano-pore throat systems developed in fine-grained sedimentary rocks”,and“Sweetspot areas(intervals)of unconventional petroleum resulted from coupling the sedimentology of several geological events”.This special issue systematically assembles new advances made in the unconventional petroleum sedimentology of China by Chinese unconventional petroleum sedimentologists in recent years.These studies refer to about 30 sets of unconventional petroleum strata(intervals)from the Proterozoic to Cenozoic in more than 50 basins,providing an important theoretical basis and technical support for unconventional petroleum exploration and development.Unconventional petroleum sedimentology would focus on deposition and formation of“sweetspot box”and“sweetspot group”developed in unconventional petroleum industry in future,and further enhance efficiency of unconventional petroleum exploration and development.