MDT测试技术在大庆油田油藏评价中应用

发布时间：2018-05-07 14:42

本文选题：MDT + 电缆地层测试　；参考：《东北石油大学》2017年硕士论文

【摘要】：模块式地层动态测试器(MDT)在地层渗透率的测量、储层流体PVT取样、油藏压力剖面的确定和流体识别等方面具有明显优势。对于复杂油气藏勘探,多油水系统共生的复杂储层认识方面,具有很大的优越性和直接的指导意义。但MDT测试资料核心解释手段为斯伦贝谢公司独有,限制了国内对MDT测试资料的充分利用。因此,开展了新一代电缆地层测试资料定量解释技术的研究工作。论文通过研究渗流力学理论,建立测试过程的数学模型;通过数学理论推导求解地层压力变化与地层参数的关系;通过离散数学手段来求解地层压力变化与地层、流体物性参数的关系;通过建立空间和时间上离散的三维、三相态物质守恒模型,成功研发出针对MDT测试工具的精细(厘米-秒级的小尺度)数值手段。在此基础上创新地实现了对各类MDT测试过程的数值“防真”模拟,求解的参数准确可靠,从而实现了真实还原地层各项物性,将MDT测试资料得以最大化的解释利用。论文详细阐述了光谱法识别储层流体的原理,掌握了国外公司的核心技术机密;在此基础上,发展出具有自主特色的电阻率折算对比法、流体光谱识别模版法、趋势分析法和地层压力剖面法等多种储层流体识别方法。利用MDT测试资料的储层产能预测技术,结合利用地质、测井等多信息综合分析提取储层产能评价参数,进行不同储层类型和流体类型条件下的储层产能预测,替代了部分试油,加快了油藏评价的进程。研发了自主知识产权的MDT测试资料解释软件,软件具有功能强大的三维三相数值模拟器,不但具备与国外公司软件的对等功能,而且还可对压力曲线进行综合拟合,反演油藏参数,已在油田上得到了广泛地应用,通过对等功能、油水综合识别效果和压力剖面对比,软件性能达到甚至优于国外同类产品。论文的研究成果具有较高的学术价值和实用价值,完成2015年至今大庆油田全部120多口井的MDT测试资料解释任务,形成的方法、软件和标准可在全国各油田推广和应用。研究成果对提高复杂油气藏的勘探效率、降低工程成本发挥了积极作用。
[Abstract]:The modular formation dynamic tester (MDT) has obvious advantages in the measurement of formation permeability, the PVT sampling of reservoir fluid, the determination of reservoir pressure profile and the identification of fluid. For the exploration of complex oil and gas reservoirs, it is of great superiority and direct guiding significance in understanding the complex reservoirs with multi-oil and water system symbiosis. However, the core interpretation of MDT test data is unique to Schlumberger, which limits the full use of MDT test data in China. Therefore, a new generation of cable formation test data quantitative interpretation technology has been carried out. By studying the theory of percolation mechanics, the paper establishes the mathematical model of the test process, deduces the relationship between formation pressure change and formation parameters by mathematical theory, and solves the formation pressure change and formation by discrete mathematical means. By establishing a three-dimensional and three-phase state material conservation model in space and time, a precise (centimeter-second scale) numerical method for MDT testing tools is developed successfully. On this basis, the numerical "truth-proof" simulation of all kinds of MDT testing processes is realized innovatively, and the parameters solved are accurate and reliable, thus realizing the real physical properties of the strata and maximizing the interpretation and utilization of the MDT test data. In this paper, the principle of identifying reservoir fluid by spectral method is described in detail, and the core technical secrets of foreign companies are grasped, on the basis of which, the resistivity conversion contrast method with its own characteristics and the template method of fluid spectrum recognition are developed. Many reservoir fluid identification methods, such as trend analysis method and formation pressure profile method, etc. The reservoir productivity prediction technology based on MDT test data, combined with comprehensive analysis and extraction of reservoir productivity evaluation parameters using geological and logging information, is used to predict reservoir productivity under different reservoir types and fluid types. It speeds up the process of reservoir evaluation. MDT test data interpretation software with independent intellectual property rights is developed. The software has a powerful three-dimensional three-phase numerical simulator, which not only has the same function as the software of foreign companies, but also can comprehensively fit the pressure curve. Inversion of reservoir parameters has been widely used in oil fields. Through the equivalent function, oil and water comprehensive identification effect and pressure profile correlation, the software performance is even better than that of foreign similar products. The research results of this paper have high academic value and practical value. The MDT test data interpretation task of all 120 wells in Daqing Oilfield from 2015 to now can be completed, and the methods, software and standards can be popularized and applied in all oilfields in China. The research results play an active role in improving the exploration efficiency and reducing the engineering cost of complex oil and gas reservoirs.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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