鄂尔多斯盆地奥陶系古岩溶发育程度的分形特征

发布时间：2018-06-18 17:02

本文选题：鄂尔多斯盆地 + 奥陶系古岩溶　；参考：《中国岩溶》2017年01期

【摘要】：鄂尔多斯盆地奥陶系天然气勘探实践表明,古岩溶发育程度影响着储层优劣,然而对古岩溶发育程度的描述缺少定量化手段。本文利用分形理论对鄂尔多斯盆地奥陶系古岩溶的发育程度进行定量化研究,首先分析了古岩溶的分形特征,进而研究了分形维数的计算方法与实现流程,最后结合钻探资料利用分形维数对工区内古岩溶发育程度进行了定量化描述并分析了其与储层优劣的关系。结果表明,鄂尔多斯盆地奥陶系古岩溶的发育具有分形特征,分形维数反映了古岩溶在一定地质条件下的发育程度,工区内工业气流井的分形维数大于1.65。因此,将分形维数作为衡量古岩溶发育程度的定量指标,无疑会提高古岩溶储层评价的客观性、科学性。
[Abstract]:The practice of Ordovician natural gas exploration in Ordos Basin shows that the development of paleokarst affects the quality of reservoir, but the description of paleokarst development is lack of quantitative means. In this paper, the development degree of Ordovician paleokarst in Ordos Basin is quantitatively studied by means of fractal theory. Firstly, the fractal characteristics of paleokarst are analyzed, and then the calculation method and realization flow of fractal dimension are studied. Finally, the development degree of paleokarst in the working area is quantitatively described by using fractal dimension combined with drilling data, and the relationship between the development of paleokarst and reservoir quality is analyzed. The results show that the development of Ordovician paleokarst in Ordos Basin has fractal characteristics, and the fractal dimension reflects the development degree of paleokarst under certain geological conditions, and the fractal dimension of industrial airflow wells in the working area is greater than 1.65. Therefore, taking fractal dimension as a quantitative index to measure the development of paleokarst will undoubtedly improve the objectivity and scientific nature of the evaluation of paleokarst reservoir.
【作者单位】：长庆油田分公司勘探开发研究院;长庆油田分公司第二采油厂;
【分类号】：P618.13;P534.42

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