【摘要】：四川盆地L地區(qū)飛仙關(guān)組、長興組碳酸鹽巖儲層的巖性多樣,孔隙結(jié)構(gòu)復(fù)雜、非均質(zhì)性強(qiáng)。測井響應(yīng)特征復(fù)雜、測井解釋多解性強(qiáng),給儲層流體識別和參數(shù)精確計算帶來很大困難。針對目標(biāo)區(qū)碳酸鹽巖儲層評價要求,論文以巖石物理實(shí)驗(yàn)為基礎(chǔ),通過巖樣縱橫波速度、核磁共振、巖電等實(shí)驗(yàn)測量,系統(tǒng)分析儲層巖性、物性、電性及聲學(xué)特征,用于分析碳酸鹽巖儲層孔隙結(jié)構(gòu)微觀特征,為弄清測井宏觀響應(yīng)特征和機(jī)理提供技術(shù)支持,為儲層參數(shù)模型建立提供實(shí)驗(yàn)依據(jù)。薄片分析顯示,地層孔隙空間類型多樣,以溶蝕孔,粒間孔、溶蝕縫等為主,巖性以溶孔、裂縫較發(fā)育的白云巖為主�？紫抖取B透率分布范圍較大,孔滲關(guān)系較復(fù)雜,覆壓孔隙度、滲透率實(shí)驗(yàn)表明,地層壓力對孔、滲影響較小。基于核磁、壓汞、薄片等實(shí)驗(yàn)結(jié)果,從孔隙尺度、喉道分布、孔隙發(fā)育類型出發(fā),將孔隙結(jié)構(gòu)分為四類,確定了不同孔隙結(jié)構(gòu)類型劃分標(biāo)準(zhǔn),并結(jié)合T2截止值與不同層位,在上述基礎(chǔ)上細(xì)分出七種孔隙結(jié)構(gòu)。將巖電實(shí)驗(yàn)同孔隙結(jié)構(gòu)結(jié)合,依據(jù)多重孔隙的組合特征闡釋儲層巖電關(guān)系的非阿爾奇現(xiàn)象,表明巖樣偏離阿爾奇關(guān)系的變化趨勢受到原生孔隙、溶蝕孔隙的雙重作用。不同孔隙流體條件下的縱、橫波速度實(shí)驗(yàn)表明,巖樣聲學(xué)特征隨流體性質(zhì)的變化明顯,特別是含氣飽和度增大使得巖樣縱波速度減小明顯,縱、橫波速比差異減小明顯,利用縱橫波速度及相關(guān)巖石彈性參數(shù)評價儲層的含氣性可具有較好的應(yīng)用效果。
[Abstract]:The carbonate reservoirs of Feixianguan formation and Changxing formation in L area of Sichuan Basin are diverse in lithology, complex in pore structure and strong in heterogeneity. It is difficult to identify reservoir fluid and accurately calculate reservoir parameters because of the complex characteristics of logging response and the multi-solution ability of log interpretation. According to the requirements of carbonate reservoir evaluation in the target area, based on the rock physics experiments, the lithology, physical properties, electrical properties and acoustic characteristics of the reservoirs are systematically analyzed through the experimental measurements of longitudinal and transverse wave velocity of rock samples, nuclear magnetic resonance (NMR) and rock electricity, etc. It is used to analyze the microscopic characteristics of pore structure of carbonate reservoir, to provide technical support for understanding the macroscopic response characteristics and mechanism of logging, and to provide experimental basis for the establishment of reservoir parameter model. The thin-slice analysis shows that the formation pore space types are varied, mainly solution pores, intergranular pores, dissolution fractures, etc. Lithology is mainly solution pores, and the fracture is more developed dolomite. Porosity and permeability distribution range is large, pore-permeability relationship is more complex, overpressure porosity. Permeability experiment shows that formation pressure has little effect on porosity and permeability. Based on the experimental results of nuclear magnetism, mercury pressure and thin slice, the pore structure is divided into four categories from pore size, throat distribution and pore development type, and the classification criteria of different pore structure types are determined, and combined with T _ 2 cut-off value and different layers, the pore structure is divided into four categories, and the T _ 2 cut-off value is combined with the different layers. On the basis of the above, seven kinds of pore structures are subdivided. Combining the petroelectric experiment with pore structure, the non-Archie phenomenon of reservoir rock-electricity relationship is explained according to the combination characteristics of multi-porosity. It is shown that the variation trend of rock sample deviating from Archie relation is affected by the dual action of primary pore and dissolved pore. P-wave and S-wave velocity experiments under different pore fluid conditions show that the acoustic characteristics of rock samples change obviously with the fluid properties, especially with the increase of gas saturation, P-wave velocity decreases obviously, P-P / S-wave velocity ratio decreases obviously, and the difference between P-wave velocity ratio and S-wave velocity ratio decreases obviously, especially with the increase of gas saturation. The use of P-S wave velocity and related rock elastic parameters can be used to evaluate the gas-bearing property of the reservoir, which has a good application effect.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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