本文選題：陸相頁巖氣　切入點(diǎn)：儲層特征　出處：《煤田地質(zhì)與勘探》2017年06期

【摘要】：結(jié)合我國陸相頁巖分布特征,以鄂爾多斯盆地延長探區(qū)為例,對鉆孔巖心樣品進(jìn)行有機(jī)地球化學(xué)、X射線衍射、孔隙度測定、掃描電鏡、氣體吸附等多種實(shí)驗(yàn)分析,研究陸相頁巖氣儲層特征。結(jié)果表明,延長探區(qū)延長組陸相頁巖厚度較大(平均50 m),有機(jī)質(zhì)豐度高(平均TOC為4.86%),有機(jī)質(zhì)類型主要為Ⅱ型,熱演化程度處于成熟階段(Rran為0.84%~1.10%);頁巖中黏土礦物質(zhì)量分?jǐn)?shù)高(21.8%~71.5%,平均47.3%),石英質(zhì)量分?jǐn)?shù)較低(10.8%~44.9%,平均22.3%),脆性指數(shù)相對較小(27.1%~77.2%,平均49.6%),表明頁巖儲層具有脆性和可壓裂性;延長組頁巖孔隙度主要分布在1%~3%,孔隙類型多樣,以粒間孔和粒內(nèi)孔為主,其次是晶間孔、微裂縫、溶蝕孔和有機(jī)質(zhì)孔,為頁巖氣賦存提供了儲集空間;延長組頁巖總含氣量為1.60~6.67 m3/t,顯示出較好的含氣性。
[Abstract]:Taking the Yanchang exploration area of the Ordos Basin as an example, the organic geochemical X-ray diffraction, porosity measurement, scanning electron microscope, gas adsorption and other experiments were carried out on the core samples of the borehole in the light of the distribution characteristics of the continental shale in China. The characteristics of continental shale gas reservoir are studied. The results show that the Yanchang formation in Yanchang exploration area has a large thickness (average 50 mg) and high organic matter abundance (average TOC is 4.86%), and the type of organic matter is mainly type 鈪，

本文編號：1660529