中国地质2025，Vol.52Issue(6)：1983-1997,15.DOI:10.12029/gc20230317002
黔北复杂构造区超浅层页岩气勘探突破与启示
Breakthrough and revelation of ultra-shallow shale gas exploration in complex structural area of northern Guizhou:Taking Well RX1 as an example
摘要
Abstract
This paper is the result of oil and gas exploration engineering. [Objective]By analyzing the organic geochemistry,reservoir physical properties,and pore characteristics of the Wufeng-Longmaxi Formation in Well RX1,the basic geological conditions of the Fuyan synclinal shale gas accumulation are clarified,and the exploration and development potential of ultra-shallow shale gas in the complex structural area outside the basin is discussed.[Methods]This study utilizes the core of Well RX1 in northern Guizhou to conduct comprehensive experimental analysis such as on-site desorption,geochemical testing,on-site fracturing effect,and reservoir characteristics.In combination with exploration data from neighboring areas,it explores the impact of burial depth and structural preservation conditions on the enrichment of ultra-shallow shale gas in northern Guizhou.[Results]The thickness of the high-quality hydrocarbon source rock section in the Wufeng Formation-Longmaxi Formation of the Well RX1 is 14.78 m,the average content of total organic carbon is 4.43％,the maturity of organic matter is between 2.36％and 2.78％,and the kerogen type is Ⅱ1,which has a good hydrocarbon generation basis;the average porosity of high-quality shale is 3.30％;and the content of brittle minerals is high,with an average brittleness index of 69,which provides a good reservoir space for shale gas.[Conclusions]The successful exploration practice of Well RX1 confirms that shale gas can be enriched in the synclinal structural unit with a depth less than 1000 m in the target layer of the complex structure area outside the Sichuan basin,which has good potential for construction and production and can be used as a favorable exploration target in the next step.Based on the analysis of regional geological data,it is believed that the compression-torsional structural system formed by the superposition and transformation of Cenozoic structures is an important place for shale gas accumulation in complex structural areas outside the basin.关键词
超浅层页岩气/五峰组—龙马溪组/盆外复杂构造区/RX1井/油气勘查工程/黔北Key words
ultra-shallow shale gas/Wufeng Formation-Longmaxi Formation/complex structural area outside the basin/Well RX1/oil and gas exploration engineering/northern Guizhou Province分类
天文与地球科学引用本文复制引用
林瑞钦,张子亚,杜威,王奕松,石富伦,刘达东,张大权,冯霞,周喆,陈祎,赵福平..黔北复杂构造区超浅层页岩气勘探突破与启示[J].中国地质,2025,52(6):1983-1997,15.基金项目
贵州省科技支撑计划项目(黔科合支撑[2023]一般370)与贵州省省级地质勘查资金项目(208-9912-JBN-L1D7)联合资助. Supported by Guizhou Provincial Key Technology Research and Development Program(No.Qiankehe Zhicheng[2023]General 370)and Guizhou Provincial Geological Exploration Fund Project(No.208-9912-JBN-L1D7). （黔科合支撑[2023]一般370）
