本文選題：頁巖氣 + 五峰—龍馬溪組　； 參考：《沉積學報》2017年04期

【摘要】：渝東北田壩地區(qū)五峰—龍馬溪組泥頁巖的礦物成分主要為石英和黏土礦物,其次為長石,此外還含有少量黃鐵礦、硬石膏等含硫礦物,以及極少量的碳酸鹽礦物。沉積學及礦物學研究表明,五峰—龍馬溪組的沉積環(huán)境以淺海陸棚為主,而淺海陸棚屬還原環(huán)境,有利于有機質(zhì)富集和保存,可以更好地形成頁巖氣;頁巖含石英量較多并且脆性指數(shù)較高,因此有利于形成裂縫以利于滲流。與相鄰的涪陵地區(qū)相對比,兩者可比性較高,并且渝東北田壩地區(qū)五峰—龍馬溪組頁巖的石英等脆性礦物含量大于涪陵地區(qū),而黏土礦物含量、碳酸鹽礦物含量遠小于涪陵地區(qū);渝東北田壩地區(qū)黏土礦物組合反映,五峰—龍馬溪組已進入了晚期成巖作用階段,該階段所對應的有機質(zhì)成熟度為高成熟—過成熟,表明其成熟度條件有利于形成頁巖氣藏;進一步研究還發(fā)現(xiàn),五峰組及龍馬溪組頁巖具有較高的孔隙度和滲透性,能為頁巖氣儲存提供較好的儲集空間。
[Abstract]:The shale of Wufeng Longmaxi formation is mainly composed of quartz and clay minerals, followed by feldspar, in addition to a small amount of pyrite, anhydrite and other sulfur-bearing minerals, as well as a very small amount of carbonate minerals. Sedimentological and mineralogical studies show that the sedimentary environment of the Wufeng-Longmaxi formation is dominated by shallow-sea shelf, which is a reductive environment, which is favorable to the enrichment and preservation of organic matter and can form shale gas better. Shale has more quartz content and higher brittleness index, so it is advantageous to form fractures and facilitate percolation. Compared with the adjacent Fuling area, the content of brittle minerals such as quartz in the shale of Wufeng Longmaxi formation is higher than that in Fuling area, and the content of clay is higher in Tianba area of northeast Chongqing. The carbonate mineral content is much smaller than that in Fuling area, and the clay mineral assemblage in Tianba area of northeast Chongqing shows that the Wufeng Longmaxi formation has entered the late diagenesis stage, and the corresponding maturity of organic matter in this stage is high maturation and overmaturity. It is also found that the shale of Wufeng formation and Longmaxi formation has high porosity and permeability, which can provide a good reservoir space for shale gas storage.
【作者單位】： 成都理工大學研究生院;四川中成煤田物探工程院有限公司;國土資源部沉積盆地與油氣資源重點實驗室成都地質(zhì)礦產(chǎn)研究所;
【基金】：國家自然科學基金項目(41030315)~~
【分類號】：P618.13

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