本文關(guān)鍵詞：常規(guī)及非常規(guī)儲(chǔ)層巖石分形特征對(duì)滲透率的影響　出處：《巖性油氣藏》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 分形維數(shù) 迂曲度 滲透率 非常規(guī)儲(chǔ)層 分形理論

【摘要】：為了刻畫不同類型儲(chǔ)層孔隙結(jié)構(gòu)及其對(duì)滲透率的影響,以壓汞、核磁共振及N2吸附實(shí)驗(yàn)為基礎(chǔ),基于分形理論對(duì)砂巖、煤巖及頁(yè)巖的分形特征進(jìn)行了分析,建立了砂巖、煤巖、頁(yè)巖的等效毛管迂曲度模型,探討了常規(guī)及非常規(guī)儲(chǔ)層巖石分形特征參數(shù)對(duì)滲透率的影響。結(jié)果表明:砂巖、煤巖、頁(yè)巖的分形維數(shù)主要為2.6~3.0,毛管平均迂曲度分形維數(shù)主要為1.1~2.3,分形維數(shù)大小與巖石滲透率具有負(fù)相關(guān)性;影響巖石滲透率的微觀孔隙結(jié)構(gòu)因素包括巖石的非均質(zhì)性、孔喉分布、孔隙表面粗糙程度及毛管迂曲度等,其中毛管迂曲度對(duì)巖石滲透率的影響最大;煤巖的等效毛管迂曲度較小,砂巖中等,頁(yè)巖較大。最后,利用分形理論模型對(duì)39組巖石樣品滲透率進(jìn)行預(yù)測(cè),認(rèn)為砂巖和煤巖的滲透率預(yù)測(cè)效果均較好,但對(duì)于具有強(qiáng)非均質(zhì)性的頁(yè)巖來(lái)說,其滲透率已經(jīng)達(dá)到n D級(jí),雖然預(yù)測(cè)結(jié)果具有一定的吻合度,但預(yù)測(cè)精度仍有待進(jìn)一步提高。此次研究對(duì)深入探討不同類型儲(chǔ)層巖石微觀滲流機(jī)理具有一定的參考價(jià)值。
[Abstract]:In order to characterize different types of reservoir pore structure and its influence on permeability, with mercury, NMR and N2 adsorption experiments, based on the fractal theory of fractal characteristics of sandstone, coal and shale are analyzed, the coal rock is built of sandstone, shale, equivalent capillary tortuosity model, discusses the effect of conventional and unconventional reservoir rock fractal parameters on the permeability. The results show that the fractal dimension of coal rock, sandstone, shale is mainly 2.6~3.0, the average capillary tortuosity fractal dimension is mainly 1.1~2.3, fractal dimension and rock permeability is a negative correlation between the microscopic pore structure; influence factors of rock permeability including heterogeneity of rock, pore throat the distribution of pore surface roughness and capillary tortuosity, the influence of capillary tortuosity on rock permeability; coal equivalent capillary tortuosity is small, medium sandstone, shale Great. Finally, carries on the forecast to the 39 groups of samples of rock permeability by using fractal theory model, considers the effect of permeability prediction of sandstone and coal rock are good, but for the strong heterogeneity of the shale, the penetration rate has reached n D, although the forecast result has a certain degree of agreement, but the accuracy still needs to be further improved. This study has a certain reference value to the study of different types of reservoir rock micro seepage mechanism.

【作者單位】： 西安石油大學(xué)地球科學(xué)與工程學(xué)院;油氣藏地質(zhì)及開發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;成都理工大學(xué)能源學(xué)院;中國(guó)地質(zhì)大學(xué)能源學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目“硬脆/塑性泥頁(yè)巖微裂縫產(chǎn)生的巖石物理學(xué)機(jī)制基礎(chǔ)研究”(編號(hào):41572130);“渤海灣盆地濟(jì)陽(yáng)坳陷古近系陸相富有機(jī)質(zhì)頁(yè)巖裂縫研究”(編號(hào):41372139);“中國(guó)南方下古生界海相富有機(jī)質(zhì)頁(yè)巖裂縫發(fā)育程度與主控因素定量關(guān)系研究”(編號(hào):41072098)聯(lián)合資助
【分類號(hào)】：P618.13;TE31
【正文快照】： 引用:尹帥,謝潤(rùn)成,丁文龍,等.常規(guī)及非常規(guī)儲(chǔ)層巖石分形特征對(duì)滲透率的影響.巖性油氣藏,2017,29(4):81-90.Cite:YIN S,XIE R C,DING W L,et al.Influences of fractal characteristics of reservoir rocks on permeability.Lithologic Reservoirs,2017,29(4):81-90.0引言分形

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