本文選題：四川盆地中部 + 熱液白云巖儲集相��； 參考：《天然氣工業(yè)》2017年03期

【摘要】：四川盆地中部(簡稱川中地區(qū))上震旦統(tǒng)燈影組是近幾年該盆地天然氣勘探的重點目標之一,尤其是表生巖溶作用及其所形成的儲滲空間一直是相關研究的重點。為此,以巖心、巖屑樣品的巖石學特征研究為基礎,結合相關微量元素、同位素和陰極發(fā)光等實驗分析結果,證實燈影組白云巖中發(fā)育有基質重結晶白云巖、充填狀鞍狀白云石(包裹體均一化溫度平均值為178.5℃、高Fe、Mn含量、~(87)Sr/~(86)Sr值偏高)和熱液礦物組合(包括閃鋅礦、方鉛礦、黃鐵礦、石英等)。進而提出該區(qū)燈影組白云巖中存在熱液白云巖儲集相的認識,即指由熱液流體對致密基質白云巖改造而形成的由熱液溶蝕孔隙、熱液成因晶間孔、熱液溶洞、熱液擴溶縫4種儲集空間構成的白云巖儲集體。為有效地認識和鑒別燈影組熱液白云巖儲集相,從巖相學和地球化學兩方面建立了鑒別標志。結論認為,該區(qū)熱液白云巖儲集相發(fā)育的控制因素為:(1)深大基底斷裂作用;(2)熱液作用強度。
[Abstract]:The Dengying formation of the Upper Sinian in the central part of Sichuan Basin is one of the key targets of natural gas exploration in this basin in recent years, especially the supergene karstification and its reservoir and seepage space. Therefore, based on the petrological characteristics of core and cuttings, combined with the experimental results of trace elements, isotopes and cathodoluminescence, it is proved that the matrix recrystallized dolomite is developed in the dolomite of the Dengying formation. The packed saddle dolomite (the average temperature of homogenization of inclusions is 178.5 鈩，

本文編號：1830526