白云深水地区渗透率评价方法研究

发布时间：2018-03-30 14:32

本文选题：斯通利波　切入点：反演　出处：《长江大学》2017年硕士论文

【摘要】：地层渗透率是油田生产及管理的重要参数,也是油藏储层评价和油气田开发的最重要的参数之一。为了获得储层渗透率,几十年以来各种测井方法层出不穷,包括常规电阻率测井、核磁测井和岩心分析方法等。随着声波测井技术的发展,其应用得到相应拓展,新一代阵列声波或交叉偶极声波仪器能够记录到低频斯通利波。斯通利波主要是通过地层孔隙流体中的慢速纵波的激发和传播造成的,由地层与井中流体的相互作用,引起井壁微观扭曲而形成,其对井壁上的这种与孔隙流体有关的压力传递最为敏感,在渗透性地层中往往会引起斯通利波的波至时间滞后和频率偏移,理论表明其变化的程度与地层渗透率有密切的关系。因此,利用阵列声波资料中的斯通利波进行反演可以得到随地层深度连续变化的渗透率曲线,这对油藏评价和进一步的产能开发都具有重大的意义。本文以研究地区探井、评价井声波测井数据为基础,结合常规测井数据和岩心资料,根据多极子阵列声波波形特征,对测井服务公司提供的声波时差等信息进行质量检查,分析声波数据存在问题并形成声波数据质量检查方法;利用多极子阵列声波测井资料提取纵波、横波和斯通利波信息,结合研究地区特点,研究分析本工区斯通利波在不同渗透率地层的特征与差异以及斯通利波评价渗透率的影响因素,对低频率斯通利波进行波场分离、正演模拟,最终反演地层渗透,对比分析不同评价渗透率方法在本工区结果:结合地区特点的斯通利波反演渗透率方法能够更有效反映渗透率变化。
[Abstract]:Formation permeability is an important parameter in oilfield production and management, and is also one of the most important parameters for reservoir evaluation and oil-gas field development. In order to obtain reservoir permeability, various logging methods have emerged in endlessly for decades. Including conventional resistivity logging, nuclear magnetic logging and core analysis methods. With the development of acoustic logging technology, its application has been expanded accordingly. The new generation of array or cross dipole acoustic instruments can record low frequency Stonley waves, which are mainly caused by the excitation and propagation of slow longitudinal waves in the pore fluid, and are caused by the interaction between the formation and the fluid in the well. It is most sensitive to the pressure transfer related to pore fluid on the well wall, and it often causes the wave arrival time lag and frequency migration of Stoneley wave in permeable formation. The theory shows that the degree of change is closely related to the formation permeability. Therefore, by using the Stoneley wave in the array acoustic data, the permeability curve with continuous variation in the depth of the anywhere layer can be obtained. This is of great significance to reservoir evaluation and further productivity development. This paper is based on the acoustic logging data of exploratory wells and evaluation wells in the study area, combined with conventional logging data and core data, according to the characteristics of multipole array acoustic wave forms. To check the quality of sonic time difference and other information provided by logging service company, analyze the existing problems of sonic data and form a method to check the quality of sonic data, and use multipole array sonic logging data to extract the information of P-wave, S-wave and Stoneley wave. Combined with the characteristics of the study area, the characteristics and differences of Stoneley wave in different permeability strata in this work area and the influencing factors of Stoneley wave in evaluating permeability are analyzed, and the wave field of low frequency Stonley wave is separated and simulated forward. Finally, the formation permeability is inversed, and the results of different permeability evaluation methods in this work area are compared and analyzed. The Stoneley wave inversion permeability method combined with the regional characteristics can reflect the permeability change more effectively.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE53

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