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  本文關(guān)鍵詞：特低滲儲(chǔ)層可動(dòng)流體飽和度研究——以甘谷驛油田長6儲(chǔ)層為例　出處：《地球物理學(xué)進(jìn)展》2017年02期 　論文類型：期刊論文

  更多相關(guān)文章： 特低滲儲(chǔ)層 可動(dòng)流體飽和度 核磁共振 恒速壓汞 微觀孔隙結(jié)構(gòu)

【摘要】：特低滲儲(chǔ)層油水分布關(guān)系復(fù)雜、微觀孔喉網(wǎng)絡(luò)分布模式及油水微觀滲流機(jī)理復(fù)雜多變、水驅(qū)效率低、開發(fā)矛盾突出.可動(dòng)流體飽和度是精細(xì)評(píng)價(jià)特低滲儲(chǔ)層的關(guān)鍵因素,因此,利用鑄體薄片、掃描電鏡、X衍射、常規(guī)壓汞、恒速壓汞、核磁共振等實(shí)驗(yàn)手段,研究分析甘谷驛油田長6儲(chǔ)層可動(dòng)流體飽和度的分布特征及主控因素.結(jié)果表明:研究區(qū)長6儲(chǔ)層的可動(dòng)流體飽和度偏小,平均值為37.42%.微觀孔隙結(jié)構(gòu)是控制可動(dòng)流體飽和度大小的主要因素,粘土礦物次之,儲(chǔ)層物性的影響最弱.滲透率對(duì)可動(dòng)流體飽和度的敏感性顯著強(qiáng)于孔隙度.孔隙連通性好,孔喉比小,喉道半徑粗、殘余粒間孔保存較好、次生孔隙發(fā)育,粘土礦物含量小,可動(dòng)流體飽和度相對(duì)較高.粒間孔的剩余程度、溶孔及喉道的發(fā)育程度等對(duì)儲(chǔ)層的好壞及可動(dòng)流體飽和度的大小具有至關(guān)重要的作用.孔隙特征參數(shù)中,喉道半徑,孔隙半徑,孔喉比、單位體積總有效孔喉體積與可動(dòng)流體飽和度的關(guān)系更為密切.
[Abstract]:The relationship between oil and water distribution in ultra-low permeability reservoir is complex, the distribution pattern of micro-pore and throat network and the mechanism of oil-water micro-seepage are complex and changeable, and the efficiency of water drive is low. Development contradiction is prominent. Movable fluid saturation is the key factor for fine evaluation of ultra-low permeability reservoirs. Therefore, the use of casting thin slice, scanning electron microscope X diffraction, conventional mercury injection, constant speed mercury pressure, nuclear magnetic resonance and other experimental means. The distribution characteristics and main controlling factors of movable fluid saturation in Chang6 reservoir of Ganguyi oilfield are studied. The results show that the movable fluid saturation of Chang-6 reservoir in study area is small. The average value is 37.42. The micropore structure is the main factor to control the saturation of movable fluid, followed by clay minerals. The sensitivity of permeability to movable fluid saturation is significantly stronger than that of porosity. The porosity connectivity is good, the pore throat ratio is small, the throat radius is coarse, the residual intergranular pores are well preserved and the secondary pores are developed. The clay mineral content is small, the movable fluid saturation is relatively high, and the residual degree of intergranular pore is relatively high. The development of dissolved pore and throat plays an important role in reservoir quality and the size of movable fluid saturation. Among the pore characteristic parameters, throat radius, pore radius, pore throat ratio. The total effective pore throat volume per unit volume is more closely related to the movable fluid saturation.
【作者單位】： 陜西延長石油(集團(tuán))有限責(zé)任公司研究院;吉林省有色金屬地質(zhì)勘查局研究所;
【基金】：陜西省科技統(tǒng)籌創(chuàng)新工程(2014KTZB03-02) 國家科技支撐計(jì)劃課題(2012BAC26B03)聯(lián)合資助
【分類號(hào)】：P618.13;TE311
【正文快照】： 0 引言 目前我國中、高滲油藏的穩(wěn)產(chǎn)難度日益加大,低滲、特低滲透油氣資源做為一個(gè)世界性難點(diǎn)、熱點(diǎn),必將推向歷史的舞臺(tái),成為石油行業(yè)可持續(xù)發(fā)展的主戰(zhàn)場(chǎng),用以緩解能源安全問題(胡文瑞和翟光明,2010;鄒才能等,2010).據(jù)國家最新一輪油氣資源評(píng)估,全國石油資源總量為1086億噸,

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