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辽河盆地是一个天然气很丰富的含油气盆地,目前已探明相当可观的天然气储量,发现多种成因的天然气藏。作者在系统总结天然气类型的基础上,发现辽河盆地的天然气多以复合形式出现。辽河盆地是在古隆起背景上发育起来的新生代裂谷盆地,裂谷发育的阶段性决定了沉积盖层具有多旋回的沉积特征,形成多套生储盖组合,构成从下到上一个完整的热演化序列,且烃源岩具有多种干酪根类型,为多源天然气生成奠定了物质基础。同时,多阶段性持续发育的断裂系统,不仅为天然气提供了良好的运移通道,而且对复式构造带的形成、油气藏的再分布和聚集起着重要作用,为多源天然气复合提供了良好条件
The Liaohe Basin is a gas-rich petroliferous basin that has proven its considerable natural gas reserves and discovered natural gas reservoirs of various origins. Based on a systematic review of natural gas types, the authors found that natural gas in the Liaohe Basin mostly appears in a complex form. The Liaohe Basin is a Cenozoic rift basin developed on the paleo-uplift background. The periodicity of rifting determines the multi-cycle sedimentary features of sedimentary caprock and forms multiple sets of reservoir-cap assemblages, forming a complete Thermal evolution sequence, and the source rock has a variety of kerogen types, which laid the material foundation for the generation of multi-source natural gas. At the same time, the multistage continuous development of the fault system not only provides a good migration channel for natural gas, but also plays an important role in the formation of compound tectonic belts, redistribution and accumulation of oil and gas reservoirs, and provides a good multi-source natural gas compounding system condition