本文選題：孔隙特征 + 桐頁1井　； 參考：《中國地質(zhì)大學(北京)》2017年碩士論文

【摘要】：龍馬溪組富有機質(zhì)頁巖是中國南方頁巖氣勘探的主要層位。為了研究黔西北地區(qū)龍馬溪組頁巖的孔隙特征,本文以桐頁1井為例,對巖心樣品做了N2吸附、CO2吸附、高壓汞孔徑分析、X—射線衍射粘土礦物及全巖分析、掃描電鏡等相關實驗,對桐頁1井的巖石學特征、地球化學特征、孔隙特征以及孔隙發(fā)育的影響因素進行了探究。實驗結果表明,桐頁1井的頁巖樣品主要由石英、粘土礦物組成,其中石英的含量在7%~75%之間,平均含量為37%,長石含量在4%~21%之間,平均含量為9%;粘土礦物(高嶺石、蒙脫石、伊利石、綠泥石)含量在7%~45%之間,平均含量為29%,主要為伊利石和蒙脫石。為了使實驗結果更加準確,本次實驗使用了三種不同的方法來分別檢測不同孔徑的孔隙。使用CO2吸附法來檢測微孔(2nm),使用N2吸附法來檢測中孔(2~50nm),使用高壓壓汞法來檢測宏孔(50nm)。實驗結果表明龍馬溪組頁巖孔隙主要發(fā)育微孔和中孔,宏孔較少;微孔與中孔的體積占了總體積的83.1%,占比表面積的95%;孔徑中主孔主要位于0.8~1.6nm、3~20nm兩個孔徑段,微孔主要孔徑主要在1.0~1.5nm之間,中孔主要孔徑在4~10nm之間。在上述研究的基礎上,探討了研究區(qū)龍馬溪組頁巖孔隙發(fā)育主探因素。微孔、中孔和宏孔的孔隙體積與比表面積有很好的正相關性;粘土礦物含量與微孔、中孔相關性較差,與宏孔有正相關性,石英含量和微孔、中孔以及宏孔都有較好正相關性;微孔、中孔體積與頁巖有機碳(TOC)呈現(xiàn)明顯正相關性,宏孔體積與頁巖有機碳(TOC)也有一定的正相關性。綜合分析顯示,TOC含量為該區(qū)頁巖孔隙發(fā)育主要因素。
[Abstract]:The organic shale of Longmaxi formation is the main layer of shale gas exploration in southern China. In order to study the pore characteristics of shale of Longmaxi formation in northwestern Guizhou, the core samples were studied by N _ 2 adsorption of CO _ 2, high pressure mercury pore size analysis of X- ray diffraction clay minerals and whole rock analysis, taking Tongren well 1 as an example. In this paper, the petrological characteristics, geochemical characteristics, pore characteristics and the influencing factors of pore development in well Tongye 1 are studied by scanning electron microscopy and other related experiments. The results show that the shale samples of well Tongye 1 are mainly composed of quartz and clay minerals, in which the content of quartz is between 7% and 75%, the average content is 37%, the content of feldspar is between 4% and 21%, the average content is 9%, and the content of clay minerals (kaolinite, montmorillonite, etc.) The content of Illite and chlorite is between 7% and 45%, and the average content is 29%, mainly Illite and montmorillonite. In order to make the experimental results more accurate, three different methods are used to detect the pores of different pore sizes. The micropore (2nm) was detected by CO2 adsorption method, the mesopore (2~50nm) was detected by N2 adsorption method, and the macro pore (50nm) was detected by high pressure mercury injection method. The experimental results show that the shale pores of Longmaxi formation are mainly micropore and mesoporous, with less macropores, the volume of micropore and mesopore accounts for 83.1% of the total volume and 95% of the specific surface area, and the main pore size of the pore is mainly located in the two pore segments of 0.81.6 nm ~ 320nm. The main pore size of micropore is between 1.0~1.5nm and the pore size of mesopore is between 4~10nm. On the basis of the above research, the main exploration factors of shale pore development in Longmaxi formation are discussed. There is a good positive correlation between pore volume and specific surface area of micropore, mesopore and macropore, clay mineral content and micropore, mesopore and macropore, quartz content and micropore, mesopore and macropore. There was a positive correlation between mesoporous volume and shale organic carbon (TOC), and a positive correlation between macropore volume and shale organic carbon (TOC). Comprehensive analysis shows that TOC content is the main factor of shale pore development in this area.
【學位授予單位】：中國地質(zhì)大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P618.13

【相似文獻】

相關期刊論文 前10條

1 俞劍華;方一亭;張大良;;陜西西鄉(xiāng)三郎鋪龍馬溪組的筆石[J];古生物學報;1988年02期

2 蘇文博,何龍清,王永標,龔淑云,周湖云;華南奧陶-志留系五峰組及龍馬溪組底部斑脫巖與高分辨綜合地層[J];中國科學(D輯:地球科學);2002年03期

3 劉樹根;馬文辛;LUBA Jansa;黃文明;曾祥亮;張長俊;;四川盆地東部地區(qū)下志留統(tǒng)龍馬溪組頁巖儲層特征[J];巖石學報;2011年08期

4 張春明;姜在興;郭英海;張維生;;川東南—黔北地區(qū)龍馬溪組地球化學特征與古環(huán)境恢復[J];地質(zhì)科技情報;2013年02期

5 張小龍;李艷芳;呂海剛;閆建萍;妥進才;張同偉;;四川盆地志留系龍馬溪組有機質(zhì)特征與沉積環(huán)境的關系[J];煤炭學報;2013年05期

6 王適擇;李忠權;郭明;李洪奎;;川南長寧地區(qū)龍馬溪組頁巖裂縫發(fā)育特征[J];科學技術與工程;2013年36期

7 周懇懇;牟傳龍;梁薇;葛祥英;;湘西北龍山、永順地區(qū)龍馬溪組潮控三角洲沉積的發(fā)現(xiàn)——志留紀“雪峰隆起”形成的新證據(jù)[J];沉積學報;2014年03期

8 劉樹根;王世玉;孫瑋;冉波;楊迪;羅超;葉sズ，

本文編號：2102850