Progress in Exploration of Volcanic Oil and Gas Reservoirs
Xu Changgui
Yang Haifeng
Wang Qingbin
Shan Xuanlong
Zhu Hongtao
Tang Huafeng
Hou Mingcai
Liu Xiaojian
Abstract：Volcanic oil and gas reservoirs in the deep part of basins are important exploration targets and have received worldwide attention.The exploration results show that there are high daily production wells of all lithologies,and rhyolite wells have the highest daily production.China has grown into the main body of global volcanic exploration in terms of reserves.The breakthrough of volcanic exploration requires decades of exploration and research accumulation,and the exploration findings show a spiral rise.The reserves of Circum-Pacific tectonic domain,Tethys tectonic domain and Central Asian orogenic belt are 44%,33%and 16%,respectively;and other areas accounted for 7%.The proved reserves of volcanic rocks in Mesozoic,Cenozoic and Paleozoic strata are 43%,38%and 19%,respectively.In terms of reserves,the proportion of lava,volcaniclastic lava and pyroclastic rock is 61%,31%and 8%,respectively,and the proportion of reserves in basalt,rhyolite and trachyte reservoirs is 41%,13%and 6%,respectively.The understanding of volcanic rock reservoir distribution can be roughly divided into the stage of reference to sedimentary rock research methods and the stage of volcanostratigraphy theory.The main controlling factors of volcanic rock reservoir are as follows:Deposition unit controls reservoir quality,tectonic process and weathering are catalysts for secondary porosity formation,deep fluid dissolution is the key to increasing pores,and formation overpressure and weak cementation are the key to preserving pores in volcaniclastic rocks.The superposition of many factors promotes the formation of multi-layer connected large-scale composite reservoir.Volcanic reservoirs can be divided into three main types:structural reservoirs,structural lithological reservoirs,and lithological reservoirs.The techniques of identifying volcanic edifices and predicting favorable lithofacies,the study of reservoir genesis as well as reservoir prediction technology provide strong support for the target locating of volcanic exploration.
Keywords：volcanic rock reservesgenesis of volcanic rock reservoirsvolcanic rock reservoir accumulation modevolcanic rock oil and gas reservoirsvolcanic edificesexploration technologypetroleum geology
Publication Date：2025-02-14
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：14( 363-376 )