【摘要】：天然氣水合物是一種潛力巨大的非常規(guī)新型能源，有望成為石油、天然氣的理想替代能源。天然氣水合物主要分布于海底沉積物和永久凍土中，海底沉積物主要為第四紀新沉積，巖性主要為泥、粘土和粉砂質(zhì)粘土。 地球物理測井可以識別天然氣水合物儲層，并估算其儲量，是天然氣水合物研究中不可或缺的地球物理方法。全波列測井包含了豐富的聲波信息，通過數(shù)據(jù)處理，可獲得縱、橫波，斯通利波等波形振幅、能量衰減、慢度等信息，這些參數(shù)可廣泛應用于儲層的彈性力學性質(zhì)研究和油氣評價。 為研究全波列測井在海底天然氣水合物儲層中的應用，本文搜集了卡斯凱迪亞地區(qū)水合物儲層的常規(guī)測井和陣列聲波測井數(shù)據(jù)，利用N次方根法提取縱、橫波速度，對水合物儲層的彈性性質(zhì)進行研究。具體包括以下幾個方面內(nèi)容：（1）求取地層彈性力學參數(shù)并總結(jié)規(guī)律，建立了彈性參數(shù)識別水合物儲層的模板；（2）研究了疏松砂巖介質(zhì)模型（Hashin-Shtrikman-Hertz-Mindlin模型和膠結(jié)模型），做出了不同模型水合物飽和度與體積模量、剪切模量、泊松比等彈性參數(shù)的關系圖；（3）分別應用Hashin-Shtrikman-Hertz-Mindlin模型、膠結(jié)模型對研究區(qū)域的三口井進行數(shù)據(jù)處理，計算儲層水合物的飽和度并與阿爾奇公式的計算結(jié)果進行對比。計算結(jié)果表明：當水合物飽和度較低時，膠結(jié)模式的處理結(jié)果與阿爾奇公式比較吻合；當水合物飽和度較大時，接觸模式和懸浮模式的處理結(jié)果與阿爾奇公式比較吻合。 本文的研究結(jié)果為識別天然氣水合物儲層提供了一種行之有效的方法，并驗證了彈性模量模型在水合物儲層解釋中的適用性。
[Abstract]:Natural gas hydrate is a potential unconventional new energy, which is expected to be an ideal alternative to oil and natural gas. Natural gas hydrate mainly distributes in seafloor sediments and permafrost, seafloor sediments are mainly Quaternary neo-sediments, and lithology are mainly mud, clay and silty clay. Geophysical logging is an indispensable geophysical method in the study of natural gas hydrate, which can identify and estimate the reserves of natural gas hydrate reservoir. The full wave train logging contains abundant acoustic information. Through data processing, the amplitude, energy attenuation, slowness and other information of the waveforms such as longitudinal, shear and Stoneley waves can be obtained. These parameters can be widely used to study the elastic properties of reservoirs and to evaluate oil and gas. In order to study the application of full wave train logging in submarine gas hydrate reservoir, the conventional logging and array acoustic logging data of gas hydrate reservoir in Cascadia area were collected, and the longitudinal and shear wave velocities were extracted by N power root method. The elastic properties of hydrate reservoir are studied. The main contents are as follows: (1) the elastic parameters of formation are obtained and the rules are summarized, and the template of identifying hydrate reservoir with elastic parameters is established. (2) the loose sandstone media model (Hashin-Shtrikman-Hertz-Mindlin model and cementing model) is studied, and the relationship diagram between hydrate saturation and elastic parameters such as volume modulus, shear modulus and Poisson's ratio is given. (3) using Hashin-Shtrikman-Hertz-Mindlin model and cementing model, the data of three wells in the study area are processed, and the saturation of reservoir hydrate is calculated and compared with the calculation results of Archie formula. The results show that when hydrate saturation is low, the treatment results of the cementation mode are in good agreement with the Archie formula, and when the hydrate saturation is high, the treatment results of the contact mode and suspension mode are in good agreement with the Archie formula. The results of this paper provide an effective method for identifying natural gas hydrate reservoirs and verify the applicability of the elastic modulus model in the interpretation of gas hydrate reservoirs.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13;P631.81

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