【作者】 其其格；

【导师】 郭科；

【作者基本信息】 成都理工大学 ， 应用数学， 2004， 硕士

【摘要】 复杂油气藏特征参数空间分布的分形描述 川西地区复杂油气藏具有低渗、低压、低产能、储量大、丰度低、非均质性强、气水关系复杂等特点，具有全然不同于常规油气藏开发的特殊性和困难性，开发的工艺技术方法比常规油气藏复杂，开发难度大。为改善油气藏目前的开发效果，提高开发水平，加快开发进程，减少开发中后期开发决策的失误，针对油气藏特点和开发早期中存在的问题，在深化储层和油气藏的认识的基础上，对油气藏空间储层物性参数与储量描述这一油气田勘探开发课题，进行了较为广泛、深入地研究和探索。在大量文献调查和对川西低渗储层研究现状分析后，应用非线性科学中的分形方法对低渗透储层的技术难点非均质性进行了重点描述，以储层物性参数的描述为手段，以横向预测为目的，以数学与计算机为工具，应用了一系列新技术、新方法及新思路，进行了细致、深入地储层参数与储量的描述，取得了下列主要认识： 1．地质问题是复杂的非线性问题，分形方法是解决非线性问题的一种有效方法。业已证明，反映地层地质特征的测井曲线普遍具有分形特征。分形方法的引入，从全新的角度为油气勘探、开发提供更多信息。本文提出了以分形方法来研究复杂油气藏，对储层的非均质性以及储量进行描述。为勘探和开发战略部署提供决策支持，这是传统方法所不具备的。 2．对储层参数的预测和描述，应用传统的线性插值会对其参数起到一种光滑作用，掩盖了参数变化的真实性。在有限样品的情况下，应用分形插值理论模拟储层参数的空间分布获得良好的效果，它能够保持原有的储层参数变化的真实性，与储层参数的实际分布相符合。 3．储层非均质物性参数的空间分布的分形插值曲面，其分维值介于2与3之间。研究成果表明：分维值越大，分形表面起伏越强烈，研究对象的非均质分布程度越高；分维值越小，分形表面越平坦，研究对象的非均质分布程度越低。分维能描述储层物性参数的分布非均匀程度。 4．论文提出了用分形方法结合储量容积法计算油气藏的储量，可以有效地克服以前计算储量模型使用平均值带来地“平滑效应”所掩盖的矛盾。开展了基础性数据研究、测井资料分析，得到符合实际的各项参数，使之具有数据量 摘要大、信息多、分布广、求取方便等优点。它对于非均质性较强的油藏，可以大大提高储量计算的精度。 5.建模技术在国际上具有先进性:建立的模型能抓住储层物性参数空间分布的本质特征，既能反映储层物性参数的宏观变化趋势，又能反映其局部的非均质性:建立的模型具有较强的预测能力，能将利用少数几口井的资料所建立的模型用于预测全区内储层物性参数的空间分布，并与实际情况接近;该项技术用于油气藏评价有明显经济效益和较高的推广应用价值。更多还原

【Abstract】 The characteristics of complex Oil-Gas pools in Western Sichuan Basin is heterogeneity. In view of this characteristics, this thesis has made an extensive and deep study about the frontier project of field exploration and development for low-permeability reservoir. Using characteristics of reservoir description ,1 describe reservoir heterogeneity and reserves by some multiparameter, multimethod descriptions. In the application non-linear science ,the fractal method has carried on the key description to the low permeability reservoir, I take the reservoir natural parameter description as the method, take the crosswise forecast as the goal, take mathematics and the computer as the tool, The thesis has applied a series of new technologies, the new method and the new mentality, thoroughly the reservoir parameter and the reserves description, obtained the following main results:1) The geological question is the complex non-linear problem, The Fractal method Provide smore information from the brand-new angle for the oil gas exploration, the development. This article studies the complex oil gas pool by the Fractal method, carries on the description to the heterogeneity of reservoir as well as the reserves. In order to provides the policy-making support for exploring and the development plan, this is the traditional method does not have.2) To the parameter of reservoir forecast and the description, the tradition linear interpolation has one kind of smooth role, it coveres the authenticity of the parameter change, the limited sample situation, the application of the Fractal interpolation theory obtains the good effects.3) The Fractal Interpolation Surface of the heterogenous characterestics of the reservoir, the dimension is between 2 and 3.The research results indicated that, D is bigger, the surface fluctuation is more intenser, the heterogeneity of research object is higher; D is smaller, the surface is smoothlesser, the heterogeneity of research object is lower. D can describe the lever of heterogeneity of reservoir.4) The paper use the Fractal method to calculate the reserves of the oil-gas pool .It can overcome the smooth effect by using the mean value, obtain the actually parameters. This methods has many merits. It can enhance the precision of the calculation.5) The technology has merits in international. The established model can hold the essential characteristics of the Reservoir Description, both can reflect the heterogeneity. The model has the stronger forecast ability, it can forecast the entire area reservoir through small data. This technology have the obvious economic efficiency and the higher promotion application value in the oil-gas fields.更多还原