论文部分内容阅读
盆地的环境地质记录是从盆地的形成、发展演变、沉积物形成的地球化学与古气候环境、沉积物堆积后所经历的压实、成岩来加以研究的。除无机介质(矿物)外的有机质,在成岩压实受热过程中化学成分与结构的变化,也是盆地环境地质记录的一部分,环境地质研究的归宿是对矿产—化石燃料形成与潜能的估价,完整的研究应该包括化石燃料形成(成烃成煤)环境及成藏(保存)环境等。对云南滇西陇川、瑞丽及保山等三个新生代断陷盆地环境地质记录的研究揭示,在极其相似的盆地形成演变、沉积地球化学与古气候、成岩与成烃背景基础上,化石燃料的形成与潜能在三个盆地具有差异性;指出陇川盆地以找寻煤型气及初熟(低熟)油为主,保山盆地以寻找浅部生物成因气及煤型气为主,瑞丽盆地相对潜能较差,仅有生物气浅部产出的可能。
The environmental geological records of the basin are studied from the formation, development and evolution of the basin, the geochemistry and palaeoclimate environment of the sediment formation, and the compaction and diagenesis experienced after the sediment accumulation. Organic matter except for inorganic media (minerals) changes in chemical composition and structure during diagenetic compaction and heating are also part of the environmental geological record of the basin. The fate of environmental geology studies is the valuation of the formation and potential of mineral-fossil fuels. Research should include the formation of fossil fuels (hydrocarbon into coal) environment and accumulation (preservation) environment. The study on the environmental geological records of three Cenozoic rift basins such as Longchuan, Ruili and Baoshan in western Yunnan reveals that on the basis of the extremely similar basin formation and evolution, sedimentary geochemistry and paleoclimate, diagenesis and hydrocarbon generation background, the fossil fuels It is pointed out that the Longchuan Basin was mainly located for finding coal-type gas and early-maturing (low-maturity) oil, while Baoshan basin was mainly for shallow biogenic gas and coal-type gas. The Ruili Basin Relatively poor potential, only the potential output of biogas shallow.