本文選題：鄂爾多斯　切入點：下石盒子組　出處：《沉積學(xué)報》2017年01期 　論文類型：期刊論文

【摘要】：利用鄂爾多斯盆地臨興地區(qū)下石盒子組鑄體薄片、掃描電鏡、陰極發(fā)光、包裹體分析,地球化學(xué)等資料,通過統(tǒng)計與計算等方法,對研究區(qū)下石盒子組不同粒級砂巖的巖石學(xué)特征,成巖演化序列以及埋藏過程中孔隙的定量演化進行研究。結(jié)果表明:1巖石學(xué)組成中,粗砂巖剛性顆粒含量高,塑性顆粒則多集中在細砂巖中;粗砂巖中硅質(zhì)膠結(jié)、碳酸鹽膠結(jié)含量較高,中、細砂巖以高嶺石膠結(jié)為主。2成巖演化階段中,粗砂巖經(jīng)歷的成巖作用較為完全,而細砂巖在早成巖B期就已經(jīng)基本致密化,中砂巖則為二者的過渡型。3二疊世—中晚三疊世為準(zhǔn)同生—早成巖B階段,成巖作用以壓實為主,其對細砂巖孔隙度影響最大;晚三疊世—中侏羅世為中成巖A階段,成巖作用以溶蝕和膠結(jié)為主,粗砂巖溶蝕作用較強,孔隙度較高,細砂巖基本不發(fā)育溶蝕和膠結(jié)作用;中侏羅世之后,成巖階段達到了中成巖B,以亞鐵碳酸鹽膠結(jié)為主,粗砂巖受到膠結(jié)作用較強,降低了一定孔隙度,但物性依然較好,粗、中、細砂巖最終孔隙度分別為11.07%、6.08%及2.60%。綜上所述,粗砂巖由于壓實作用較弱,溶蝕作用較強,可以形成良好的儲集空間,中砂巖主要受控于壓實和膠結(jié)作用的雙重影響,形成次一級的儲集空間,而細砂巖以壓實破壞為主,物性相對最差。
[Abstract]:By means of statistical and computational methods, the shallow-Shihezi formation of the Lower Shihezi formation, Ordos Basin, was used to cast thin sheet, scanning electron microscope, cathodoluminescence, inclusion analysis, geochemistry and so on. The petrological characteristics, diagenetic evolution sequence and quantitative evolution of pores in the buried process of different grained sandstone in Xiashihezi formation are studied in the study area. The results show that the content of rigid grains in coarse sandstone is high in the petrological composition of 1: 1. The content of siliceous cementation and carbonate cementation in coarse sandstone is relatively high, and the diagenesis of coarse sandstone is relatively complete during the diagenetic evolution stage of kaolinite cementation, which is dominated by kaolinite cementation. The fine sandstone has been densified basically in the early diagenetic stage B, while the middle sandstone is the transitional type of stage B of the Permian to the middle and late Triassic. The diagenesis is dominated by compaction, which has the greatest influence on the porosity of fine sandstone. The late Triassic-Middle Jurassic is the stage A of middle diagenesis, the diagenesis is dominated by dissolution and cementation, the dissolution of coarse sandstone is stronger, the porosity of coarse sandstone is higher, and the fine sandstone has not developed dissolution and cementation, and after the Middle Jurassic, The diagenetic stage reached the middle diagenetic B, mainly ferrous carbonate cementation, the coarse sandstone was strongly cemented, and the porosity was decreased, but the physical properties were still good. The final porosity of the fine sandstone was 11.076.08% and 2.60%, respectively. In summary, the final porosity of the fine sandstone is 11.076.08% and 2.60% respectively. Due to weak compaction and strong dissolution, coarse sandstone can form a good reservoir space. The medium sandstone is mainly controlled by the dual effects of compaction and cementation, forming a secondary reservoir space, while the fine sandstone is dominated by compaction failure. Physical properties are relatively the worst.
【作者單位】： 低滲透油氣田勘探開發(fā)國家工程實驗室;甘肅省油氣資源研究重點實驗室/中國科學(xué)院油氣資源研究重點實驗室;中國科學(xué)院大學(xué);中國石油長慶油田分公司勘探開發(fā)研究院;青島地質(zhì)工程勘察院;中國科學(xué)院蘭州文獻情報中心;正元地理信息有限責(zé)任公司山東分公司;
【基金】：低滲透油氣田勘探開發(fā)國家工程實驗室開放課題(2016GSKJ05-01) 國家自然科學(xué)基金(41502142) 中國科學(xué)院油氣資源研究重點實驗室開放基金(KFJJ2013-02);中國科學(xué)院西部行動計劃(KZCX2-XB3-12) 甘肅省重點實驗室專項(1309RTSA041)~~
【分類號】：P618.13

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