本文選題：煤系頁巖氣　切入點(diǎn)：非均質(zhì)性　出處：《中國礦業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：我國海陸過渡相頁巖氣資源豐富(約為8.9×10~(12) m~3),主要賦存于煤系頁巖。煤系頁巖在宏觀和微觀尺度均存在顯著的非均質(zhì)性,對儲層的可改造性影響較大。論文以河?xùn)|煤田石炭-二疊系太原組與山西組泥頁巖為研究對象,運(yùn)用鉆孔統(tǒng)計(jì)、實(shí)驗(yàn)測試、理論分析的方法,研究儲層的非均質(zhì)性和可改造性特征,優(yōu)選優(yōu)質(zhì)儲層,探討非均質(zhì)性對可改造性的影響機(jī)理,得到如下認(rèn)識:依據(jù)頁巖連續(xù)厚度和夾層情況,將煤系頁巖儲層由上至下劃分為Ⅰ、Ⅱ、Ⅲ和Ⅳ四個(gè)層段,頁巖厚度分別為26.79 m、17.42 m、11.13 m、25.32 m;厚度變異系數(shù)分別0.56、0.33、0.79、0.69。太原組底界平均埋深676 m。有機(jī)質(zhì)類型Ⅲ型為主;TOC平均為3.27%,TOC變異系數(shù)平均為0.49;R_o平均為1.93%,處于高成熟-過成熟階段。石英含量平均為40.63%,變異系數(shù)平均為0.11;黏土礦物含量平均為46.88%,變異系數(shù)平均為0.16。比表面積平均為4.65 m~2/g,變異系數(shù)平均為0.43;總孔容平均為0.007 m L/g,變異系數(shù)平均為0.26;孔徑平均為20.25 nm,變異系數(shù)平均為0.44;孔隙度平均1.62%,變異系數(shù)平均為1.01。滲透率分布范圍0.019~3.67×10~(-3) m D,平均0.331×10~(-3) m D;滲透率變異系數(shù)0.00~1.92,平均為0.92。自第Ⅰ至第Ⅳ層段,儲層特征綜合評價(jià)系數(shù)為Q_1=(0.69,0.48,0.31,0.58),儲層非均質(zhì)性綜合評價(jià)系數(shù)為Q_2=(0.42,0.65,0.32,0.63),綜合評價(jià)系數(shù)Q_(綜合)=(0.55,0.57,0.32,0.60)。礦物可壓裂性依次為0.57、0.28、0.33、0.66,巖石力學(xué)可壓裂性依次為0.55、0.50、0.49、0.34,綜合可壓裂性依次為0.65、0.39、0.44、0.52。厚度、TOC和含氣量、石英含量等參數(shù)非均質(zhì)性越小,比表面積、孔隙度、平均孔徑和滲透率非均質(zhì)性越大,孔裂隙的構(gòu)成越復(fù)雜,對壓裂越有利。綜合宏觀儲層展布和微觀儲層特征及其非均質(zhì)性特征,認(rèn)為第Ⅱ?qū)佣螢閮?yōu)先壓裂段。論文獲得了河?xùn)|煤田煤系頁巖氣儲層的空間展布、儲層地化、儲層物性及可改造性特征,闡明了儲層宏觀非均質(zhì)性和微觀非均質(zhì)性特征,獲取了優(yōu)質(zhì)層段和優(yōu)選壓裂段,揭示了儲層非均質(zhì)性對可改造性影響的微觀機(jī)理,其認(rèn)識為煤系頁巖氣儲層評價(jià)開發(fā)和優(yōu)選優(yōu)質(zhì)儲層提供依據(jù)。
[Abstract]:China is rich in marine and continental transitional shale gas resources (about 8.9 脳 10 ~ (12)) m ~ (3), which mainly occurs in coal shale, which is characterized by significant heterogeneity at macro and micro scales. The shale of Carboniferous-Permian Taiyuan formation and Shanxi formation in Hedong coalfield is taken as the research object, and the methods of borehole statistics, experimental test and theoretical analysis are used. By studying the characteristics of reservoir heterogeneity and revamability, selecting high quality reservoirs, and discussing the influence mechanism of heterogeneity on revamability, the following conclusions are obtained: according to the continuous thickness of shale and intercalation, The coal measures shale reservoir is divided from top to bottom into four formations: 鈪，

本文編號：1620934