本文選題：頁巖儲層 + 微觀結構��； 參考：《中國石油大學學報(自然科學版)》2016年04期

【摘要】：依據(jù)全巖XRD衍射、低溫氮氣吸附實驗獲取平均孔徑、比表面積、綠泥石相對含量等微觀儲層評價參數(shù),對遼河大民屯凹陷頁巖儲層分級評價。研究表明:3個微觀參數(shù)彼此之間存在明顯的線性關系;平均孔徑與綠泥石含量呈線性關系,綠泥石相對含量越高,平均孔徑越大,其主要原因是綠泥石富集化學性質活潑的Fe元素,可吸附大量有機質,有機質在成熟演化階段可生成大量的有機酸而形成溶蝕孔,并增加儲層的平均孔徑;平均孔徑與比表面積之間也呈現(xiàn)明顯的線性關系,且具有明顯的三分性,當平均孔徑大于10 nm時比表面積均小于1 m2/g,當平均孔徑為5~10 nm時,比表面積介于1~6 m2/g,當平均孔徑小于5 nm時比表面積均大于6 m2/g;比表面積和綠泥石相對含量兩個微觀參數(shù)之間也呈現(xiàn)出線性關系,且各個拐點之間的參數(shù)具有一致性,綠泥石相對含量為5%和9%時,對應的平均孔徑為5和10 nm、比表面積為6~1 m2/g,可利用該拐點對頁巖儲層分級評價。
[Abstract]:According to the XRD diffraction of whole rock and nitrogen adsorption experiment at low temperature, the microcosmic reservoir evaluation parameters, such as average pore size, specific surface area and relative content of chlorite, were obtained, and the shale reservoirs in the Damingtun sag of Liaohe River were classified and evaluated. The results show that there is an obvious linear relationship between the three microcosmic parameters, the average pore size is linear with the chlorite content, the higher the relative content of chlorite is, the larger the average pore size is. The main reason is that chlorite is rich in active Fe elements and can adsorb a large amount of organic matter. Organic matter can form a large amount of organic acids in the maturing stage and form dissolution pores and increase the average pore size of reservoir. There is also a linear relationship between the average pore size and the specific surface area, and there is an obvious trichotomy. When the average pore size is greater than 10 nm, the specific surface area is less than 1 m2 / g, and when the average pore size is 5 ~ 10 nm, the specific surface area is less than 1 m ~ 2 / g. The specific surface area is between 1 and 6 m2 / g, and when the average pore size is less than 5 nm, the specific surface area is greater than 6 m2 / g, and there is a linear relationship between the specific surface area and the relative content of chlorite, and the parameters of each inflection point are consistent. When the relative content of chlorite is 5% and 9%, the corresponding average pore size is 5 and 10 nm, and the specific surface area is 6 ~ 1 m ~ 2 / g. This inflection point can be used to evaluate shale reservoir classification.
【作者單位】： 中國石油大學非常規(guī)油氣與新能源研究院;遼河油田有限責任公司勘探開發(fā)研究院;東北石油大學地球科學學院;
【基金】：國家自然科學基金項目(41302103,41330313,41472105,U1262106,41572135) 中國石油科技創(chuàng)新基金項目(2014D-5006-0107) 中央高校基本科研業(yè)務費專項(15CX05008A)
【分類號】：P618.13

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