全波列测井在天然气水合物储层解释中的应用
发布时间：2018-12-17 19:53
【摘要】：天然气水合物是一种潜力巨大的非常规新型能源，有望成为石油、天然气的理想替代能源。天然气水合物主要分布于海底沉积物和永久冻土中，海底沉积物主要为第四纪新沉积，岩性主要为泥、粘土和粉砂质粘土。 地球物理测井可以识别天然气水合物储层，并估算其储量，是天然气水合物研究中不可或缺的地球物理方法。全波列测井包含了丰富的声波信息，通过数据处理，可获得纵、横波，斯通利波等波形振幅、能量衰减、慢度等信息，这些参数可广泛应用于储层的弹性力学性质研究和油气评价。 为研究全波列测井在海底天然气水合物储层中的应用，本文搜集了卡斯凯迪亚地区水合物储层的常规测井和阵列声波测井数据，利用N次方根法提取纵、横波速度，对水合物储层的弹性性质进行研究。具体包括以下几个方面内容：（1）求取地层弹性力学参数并总结规律，建立了弹性参数识别水合物储层的模板；（2）研究了疏松砂岩介质模型（Hashin-Shtrikman-Hertz-Mindlin模型和胶结模型），做出了不同模型水合物饱和度与体积模量、剪切模量、泊松比等弹性参数的关系图；（3）分别应用Hashin-Shtrikman-Hertz-Mindlin模型、胶结模型对研究区域的三口井进行数据处理，计算储层水合物的饱和度并与阿尔奇公式的计算结果进行对比。计算结果表明：当水合物饱和度较低时，胶结模式的处理结果与阿尔奇公式比较吻合；当水合物饱和度较大时，接触模式和悬浮模式的处理结果与阿尔奇公式比较吻合。 本文的研究结果为识别天然气水合物储层提供了一种行之有效的方法，并验证了弹性模量模型在水合物储层解释中的适用性。
[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.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.81
本文编号：2384720
[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.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.81
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