塔里木盆地塔河油田奥陶系数字岩心图像中生物扰动的定量表征

发布时间：2019-01-22 17:50

【摘要】：生物扰动对塔里木盆地塔河油田奥陶系碳酸盐岩"基质储集体"储集性能的改造效应具有重要影响。以塔河油田奥陶系岩心为研究对象,利用Adobe汶Photoshop汶CS6软件提供的生物扰动数字图像分析软件包,对岩心数字图像中生物扰动区域进行了识别和定量表征。结果表明:(1)在生物扰动数字图像分析软件包提供的方法中,"相似像素选择法"和"魔棒法"是对生物扰动识别与定量表征最为有效的方法,但二者适用范围不同;(2)"相似像素选择法"适用于生物扰动程度较大,单个形体相对较小且离散度相对较高的情况:当生物扰动充填物和围岩基质边界对比度较大时,应用"选取相似"操作效果最好;而当生物扰动充填物和围岩基质边界对比度较小时,应用"色彩范围"操作识别效果最好;这2种操作都仅能执行1次;(3)"魔棒法"对于识别生物扰动区域形体大而分布连续,且充填物颜色不同的情况具有独到优势;该方法可以通过多次重复操作以及调整"容差"来提高生物扰动区域与围岩基质的识别度。该研究对从生物成因角度解释碳酸盐岩"基质储集体"的非均质性与分布规律、实现增强储集性能生物扰动属性表征、丰富海相碳酸盐岩储集层地质学理论、指导该类油气藏远景勘探和储量计算以及选择合理的开发方案等具有重要意义。
[Abstract]:Bioturbation has an important influence on the reconstruction effect of "matrix reservoir" of Ordovician carbonate rocks in Tahe Oilfield, Tarim Basin. Taking the Ordovician core of Tahe Oilfield as the research object, the biological disturbance region in the digital image of the core is identified and quantitatively characterized by using the digital image analysis software package of biological disturbance provided by Adobe Wen Photoshop Wen CS6 software. The results show that: (1) among the methods provided by the digital image analysis software package, "similar pixel selection method" and "magic wand method" are the most effective methods for biological disturbance identification and quantitative characterization, but their application ranges are different; (2) the "similar pixel selection method" is suitable for the case where the biological disturbance degree is large, the individual body is relatively small and the dispersion is relatively high: when the boundary contrast between the biological disturbance filling and the surrounding rock matrix is larger, The application of "selecting similarity" has the best effect; However, when the contrast of the boundary between the biological disturbance filling and the surrounding rock matrix is small, the best recognition effect can be obtained by using the "color range" operation, which can only be performed once. (3) the "magic wand method" has the unique advantage in identifying the biologic disturbance area with large shape and continuous distribution, and the filling color is different; This method can be used to improve the recognition degree of biologic disturbance area and surrounding rock matrix by repeated operation and adjustment of tolerance. In this study, the heterogeneity and distribution of carbonate "matrix reservoir" are explained from the point of view of biological genesis, and the characterization of biological disturbance properties is enhanced, and the geological theory of marine carbonate reservoir is enriched. It is of great significance to guide the prospective exploration and reserve calculation of this kind of reservoirs and to select reasonable development plans.
【作者单位】：河南理工大学资源环境学院;河南省生物遗迹与成矿过程重点实验室;中国石油大学(华东)地球科学与技术学院;中国石油塔里木油田分公司开发事业部;
【基金】：国家自然科学基金项目(批准号:41472104) 河南省高校科技创新团队支持计划(编号:17IRTSTHN025)联合资助~~
【分类号】：P618.13

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