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虽然目前我国生物气的勘探开发程度较低,但它却是未来天然气勘探的重要接替领域。基于已发表文献,系统收集、整理笔者近年来采集样品的分析测试结果,分析了生物气的组分、烷烃气碳同位素、二氧化碳碳同位素和甲烷氢同位素特征,总结了我国目前发现的生物气在层位、深度和区域上的分布特征:①生物气主要赋存于第四系、新近系—古近系、白垩系;②生物气藏埋深普遍较浅,最深的约1900m,最浅的只有十几米;③生物气藏分布具有明显的分区性,东部显示多,西部储量大,与这些地区的生物气源岩的“量”和“质”密切相关。结论认为:①应积极在规模较大、具备较好烃源条件的中新生代沉积盆地中寻找大中型生物气田;②松辽盆地浅层、渤海湾盆地、柴达木盆地东部是我国今后生物气勘探的重点地区。
Although China’s current low level of exploration and development of biogas, but it is an important succession of natural gas exploration in the future. Based on the published literature, the author systematically collected and analyzed the analytical test results collected by the author in recent years, and analyzed the components of biogas, the carbon isotopes of carbon and carbon isotopes, the hydrogen isotopes of carbon dioxide and the biogas present in China The distribution characteristics of horizon, depth and area: (1) Biogas mainly occurs in the Quaternary, Neogene, Paleogene and Cretaceous; (2) The burial depth of biogas is generally shallow and deepest Only about ten meters; (3) The distribution of biogas reservoirs has obvious regionalization, with many in the east and large reserves in the west, which are closely related to the “quantity” and “quality” of biogas source rocks in these areas. The conclusions are as follows: ① Large and medium-sized biogas fields should be actively searched for in the Mesozoic-Cenozoic sedimentary basins with large scale and good hydrocarbon source conditions; ② The shallow layers in the Songliao Basin, the Bohai Bay Basin and the eastern Qaidam Basin are the future biological Gas exploration key areas.