本文關(guān)鍵詞：延長油田坪北區(qū)長8儲層孔隙結(jié)構(gòu)特征及其對水驅(qū)油微觀特征的影響　出處：《大慶石油地質(zhì)與開發(fā)》2017年05期 　論文類型：期刊論文

  更多相關(guān)文章： 孔隙結(jié)構(gòu) 驅(qū)油效率 儲層物性 孔喉 坪北區(qū) 長

【摘要】：儲層孔隙結(jié)構(gòu)對水驅(qū)油特征有重大影響。以延長油田坪北區(qū)長8儲層為例,綜合利用巖心、鑄體薄片、掃描電鏡、壓汞實驗等資料對儲層孔隙結(jié)構(gòu)進(jìn)行分析,通過真實砂巖微觀模型實驗,探討了不同孔隙結(jié)構(gòu)對水驅(qū)油效率的影響。研究表明:長8儲層主要巖性為細(xì)粒長石砂巖和細(xì)粒巖屑長石砂巖,主要孔隙類型為殘余粒間孔隙(原生孔隙)、溶蝕粒間和粒內(nèi)孔隙(次生孔隙);儲層類型可分為Ⅰ類、Ⅱ類、Ⅲ類和Ⅳ類,Ⅰ、Ⅱ類為主要儲層;水驅(qū)油驅(qū)替類型以均勻驅(qū)替、網(wǎng)狀均勻驅(qū)替、指狀網(wǎng)狀驅(qū)替以及指狀驅(qū)替為主,儲層物性、孔喉特征對驅(qū)油效率有重要影響,Ⅰ、Ⅱ類儲層驅(qū)油效率高達(dá)50%。明確孔隙結(jié)構(gòu)與驅(qū)油效率關(guān)系可更好地指導(dǎo)油氣合理開發(fā)。
[Abstract]:The pore structure of reservoir has great influence on the characteristics of water flooding. Taking Chang 8 reservoir in Pingbei District of Yanchang Oilfield as an example, the pore structure of reservoir is analyzed by using the data of core, casting thin section, scanning electron microscope and mercury injection experiment. The effect of different pore structure on oil displacement efficiency is discussed through microscopic model experiments of real sandstone. The results show that the main lithology of Chang 8 reservoir is fine feldspathic sandstone and fine grain lithic feldspathic sandstone. The main pore types are residual intergranular pores (primary pores), dissolved intergranular and intragranular pores (secondary pores); The reservoir types can be divided into class 鈪，

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