有机页岩最优化测井解释与岩石物理研究

发布时间：2018-02-24 19:52

本文关键词： 有机页岩测井解释最优化岩石物理建模　出处：《中国地质大学(北京)》2015年硕士论文　论文类型：学位论文

【摘要】：与常规油气储层相比,有机页岩矿物成分复杂,孔隙度小,渗透率低,流体赋存形式多样,常规测井解释理论与方法不再适用于有机页岩储层。有机页岩岩石物理特性是测井与地震解释的基础和桥梁,而且国内外关于其岩石物理特性研究较少。为了实现有机页岩的测井精细解释和地震储层预测,针对该类非常规油气储层开展测井最优化解释与岩石物理特性研究具有重要理论研究意义和实际应用价值。本文以有机页岩地质特征与测井响应为基础,先后开展了最优化测井解释方法与岩石物理建模方法的研究。首先,开展了最优化测井解释理论和算法的研究,研究了信赖域法、模式搜索法、遗传算法的原理及实现步骤,建立了有机页岩的岩石物理模型,实现了有机页岩地层的最优化测井解释,计算得到了各种矿物组分的含量。研究表明,模式搜索法计算精度较高,而利用5条测井曲线反演的矿物含量效果较好;其次,针对页岩地层模型开展了岩石物理建模理论和方法研究,根据最优化测井解释得到的矿物含量,实现了纵横波速度与弹性参数的计算方法,该理论与方法在有机页岩地层中进行了实验,计算得到的纵横波速度、体积密度与偶极声波测井一致性好,验证了岩石物理建模方法的可靠性,证明了纵横波速度与弹性参数估算方法的正确性;再次,研究了有机页岩弹性参数与总有机碳含量的关系,初步总结了有机碳含量对弹性参数的影响规律;最后,针对某页岩地层井,利用本文研究的最优化测井解释算法、岩石物理建模理论与方法,计算得到了矿物组分含量,估算了纵横波速度与弹性参数,应用效果较好,再次验证了本文所提出算法的正确性与适用性。该论文通过构建有机页岩岩石物理模型,实现了最优化测井解释和岩石物理建模方法,分析了其弹性属性。研究成果为进一步研究有机页岩的测井解释与岩石物理奠定了一定基础。
[Abstract]:Compared with conventional oil and gas reservoirs, organic shale has complex mineral composition, small porosity, low permeability, and various forms of fluid occurrence. Conventional logging interpretation theories and methods are no longer applicable to organic shale reservoirs. The physical properties of organic shale rocks are the basis and bridge of logging and seismic interpretation. In order to realize the fine logging interpretation of organic shale and the prediction of seismic reservoir, there is little research on the physical characteristics of rock at home and abroad. It has important theoretical significance and practical application value to carry out logging optimization interpretation and petrophysical characteristics study for this kind of unconventional oil and gas reservoirs. This paper is based on the geological characteristics and logging response of organic shale. First, the theory and algorithm of optimal logging interpretation are studied, and the principles and implementation steps of trust region method, pattern search method, genetic algorithm are studied. The rock physical model of organic shale is established, the optimum log interpretation of organic shale formation is realized, and the contents of various mineral components are calculated. Secondly, the theory and method of rock physical modeling are studied for shale formation model, according to the mineral content obtained by optimizing log interpretation, the mineral content is obtained by using 5 log curves. The method of calculating the velocity and elastic parameters of P-S wave is realized. The theory and method are tested in organic shale formation. The calculated velocities, bulk density and dipole acoustic logging are in good agreement with each other. The reliability of rock physical modeling method is verified, and the correctness of the estimation method of compressional and shear wave velocity and elastic parameters is proved. Thirdly, the relationship between elastic parameters of organic shale and total organic carbon content is studied. The effect of organic carbon content on elastic parameters is preliminarily summarized. Finally, the mineral component content is calculated by using the optimized log interpretation algorithm and the theory and method of rock physical modeling for a shale formation well studied in this paper. The velocities and elastic parameters of compressional and shear waves are estimated, and the application results are good, and the correctness and applicability of the proposed algorithm are verified again. In this paper, the physical model of organic shale rocks is constructed. The optimum logging interpretation and rock physical modeling method are realized and its elastic properties are analyzed. The research results lay a foundation for further research on logging interpretation and rock physics of organic shale.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.81

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