浅析松辽盆地北部青山口组页岩气资源潜力

Shale Gas Resource Potential Analysis of Qingshankou Group in Northern Songliao Basin

北美地区成功勘探开发非常规资源的实践揭示,页岩气是近年来发展最快、潜力最大的非常规能源。松辽盆地北部页岩气的勘探还处于起步阶段,需要从北美地区借鉴成功经验。在总结页岩气成功探区成藏条件的基础上,分析松辽盆地青山口组页岩气的成藏条件。研究表明:松辽盆地青山口组在泥页岩发育规模、沉积环境等多个方面与国外具有广泛的相似性,具备多方面的有利成藏要素:稳定的长期还原沉积环境;广泛分布的厚层泥页岩;发育丰度高、类型好、高成熟度的优质气源岩;合适的埋藏深度。尽管松辽盆地陆相泥页岩与国外海相泥页岩在发育的构造背景、沉积体系、岩性发育等多个方面还存在较大的差距,不能像北美地区一样形成大规模的页岩气藏,但是在中央凹陷局部地区仍可找到页岩气的勘探甜点区。

Successful exploring developing unconventional resources practice in North America revealed that the shale gas is developing the fastest and the greatest potential unconventional energy in recent years.The northern Songliao Basin shale gas exploration is still in its infancy,and to have the successful experience to go by North America exploration.Based on the summary of shale gas exploration area successful accumulation conditions the Songliao Basin Qingshankou Group shale gas accumulation conditions is analysed.Research shows Songliao Basin Qingshankou Group and abroad have extensive similarity in many aspects,such as,the scale of the development,depositional environment of clay shale gas.Qingshankou Group owns many favorable accumulation elements,which is a stable,long-term reducing environment,widely distributed thick-layers clay shale,developing high abundance,good type,high maturity,high quality gas source rocks,and appropriate burial depth.Although the Songliao Basin continental facies shale and foreign marine facies shale,there are still large differences in many aspects,such as,tectonic setting of the development.Depositional system and lithology development.Therefore,Songliao Basin continental facies shale can not be the same as North America to form a large-scale shale gas reservoir.However,the shale gas exploration dessert area in some areas of the central depression can be still find.