本文選題：超深層泥頁(yè)巖 + 筇竹寺組�。� 參考：《成都理工大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年02期

【摘要】：利用SEM-PCAS孔隙定量表征技術(shù)與低壓N_2等溫吸附實(shí)驗(yàn)研究X井深度為6 875~8 042m超深層泥頁(yè)巖的納米孔隙特征,并選取四川盆地及周緣地區(qū)從地表到5km左右的樣品組作為對(duì)比,探索深埋藏作用對(duì)泥頁(yè)巖孔隙系統(tǒng)的影響。研究發(fā)現(xiàn),X井志留系龍馬溪組、奧陶系五峰組及下寒武統(tǒng)筇竹寺組超深層泥頁(yè)巖32個(gè)樣品的孔隙特征相似,孔隙類(lèi)型以有機(jī)質(zhì)孔、粒間孔為主,孔隙形態(tài)以狹長(zhǎng)-裂縫型為主。N_2等溫吸附線類(lèi)型為IV-H3型,QSDFT孔徑分布顯示其納米孔隙主要分布于4~16nm段,BET比表面積為8.63~16.13m2/g。與對(duì)照組樣品相比,X井超深層泥頁(yè)巖的孔徑分布更加分散,微孔體積和微孔比表面積更小,介孔/微孔的體積比值及介孔/微孔的比表面積比值比非超深層泥頁(yè)巖均具有數(shù)量級(jí)的優(yōu)勢(shì)。X井超深層泥頁(yè)巖的孔隙特征主要受埋藏深度控制,深埋藏作用會(huì)使泥頁(yè)巖孔徑縮小并改變孔隙的形態(tài)。
[Abstract]:The SEM-PCAS pore quantitative characterization technique and isothermal adsorption experiment of low pressure NSP 2 were used to study the characteristics of nano-pores in the ultra-deep shale with a depth of 6 875N 8042m. The samples from the surface to the 5km in Sichuan Basin and the surrounding areas were selected as a comparison. To explore the influence of deep burial on shale pore system. It is found that 32 samples of ultradeep shale from Silurian Longmaxi formation, Ordovician Wufeng formation and Lower Cambrian Qiongzhusi formation have similar pore characteristics, and the pore types are mainly organic pore and intergranular pore. The pore morphology is mainly narrow and fissured. The isothermal adsorption line type of N2 is IV-H3 type QSDFT pore size distribution. The pore size distribution shows that the specific surface area of nano-pore is 8.63 ~ 16.13 m ~ (2 / g) in 4~16nm. Compared with the control group, the pore size distribution, the micropore volume and the specific surface area of the ultradeep shale in well X are more dispersed, and the specific surface area of the micropore is smaller than that of the control. The volume ratio of mesoporous / micropore and the specific surface area ratio of mesoporous / micropore have several advantages over non-ultra-deep shale. The pore characteristics of ultra-deep shale in X well are mainly controlled by burial depth. Deep burial will reduce the pore size of shale and change the pore shape.
【作者單位】： 油氣藏地質(zhì)及開(kāi)發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室(成都理工大學(xué));
【基金】：四川省科技計(jì)劃項(xiàng)目(15ZC1390) 國(guó)家自然科學(xué)基金項(xiàng)目(41572119)
【分類(lèi)號(hào)】：P618.13

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