The petrographic description of carbonate facies: are we all speaking the same language?
The petrographic description of carbonate facies: are we all speaking the same language?
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碳酸盐岩相的岩相描述：我们都在说同一种语言吗？
DOI：
10.1111/sed.12293
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发表时间：
2015
期刊：
影响因子：
3.5
通讯作者：
Mariam Al Junaibi
中科院分区：
文献类型：
--
作者：
S. Lokier;Mariam Al Junaibi
学术界和工业界都需要一致和可重复的碳酸盐岩岩相分类作为沉积、成岩和储层模型构建的主要输入，而Dunham体系长期以来一直被认为满足这一要求。然而，在碳酸盐岩的岩相学描述中的模糊性是普遍存在的。本研究调查了学术界和工业界在广泛的经验水平上的碳酸盐岩岩相分类，以定量评估重现性。大约241名志愿者，拥有超过4200年的综合经验，检查了一系列合成岩石纹理和自然岩性，并根据他们的意见分配纹理。研究的结果确定的情况下，分类模糊和不一致是最常见的。邓纳姆分类系统被证明是首选方案，89%的分类使用某种形式的邓纳姆系统。然而，所有的24个样品产生了广泛的变化，在22和131个不同的名称被分配给一个单一的标本之间的分配纹理。不一致的最常见原因是：在评估支持模式的错误，在估计岩性内的颗粒的大小和体积的错误，以及混淆如何分类的岩性，其中一个以上的结构是存在的。修改后的Dunham分类系统的纹理被重新定义，以澄清任何分类标准，已被确定为混淆点。提供了详细的分类准则，以尽量减少误认或混淆的可能性。有人建议，挡板石一词是多余的，应该从分类系统中删除。这些准则的采用将提高碳酸盐岩岩石学分类的可信度、可靠性和价值，从而加强沟通，促进开发更符合实际的沉积、成岩和储层模型。
Both academia and industry require consistent and repeatable carbonate lithofacies classifications as a primary input to the construction of depositional, diagenetic and reservoir models, and the Dunham System has long been held to satisfy this requirement. However, ambiguities in the petrographic description of carbonates are widespread. This study investigates the classification of carbonate lithofacies across academia and industry at a wide range of experience levels in order to quantitatively assess reproducibility. Some 241 volunteers, with over 4200 years of combined experience, examined a range of synthetic rock textures and natural lithologies and assigned textures as they saw appropriate. The results of the study identify the situations where classification ambiguities and inconsistencies are most common. The Dunham classification system was proved to be the scheme of choice with 89% of the classifications using some form of the Dunham system. However, all of the 24 samples yielded a wide variability in assigned texture with between 22 and 131 different names being assigned to a single specimen. The most common causes of inconsistency are; errors in assessing the mode of support, mistakes in estimating the size and volume of grains within the lithology, and confusion as to how to classify lithologies in which more than one texture is present. The textures of the modified Dunham Classification System are redefined in order to clarify any classification criteria that have been identified as points of confusion. Detailed classification guidelines are offered in order to minimize the possibility of misidentification or confusion. It is suggested that the term bafflestone is redundant and should be removed from the classification system. The adoption of these guidelines will increase confidence, reliability and value in the petrographic classification of carbonate lithologies, thereby enhancing communication and facilitating the development of more realistically constrained depositional, diagenetic and reservoir models.
影响因子：
3.9
作者：
A. Geske;S. Lokier;M. Dietzel;D. Richter;D. Buhl;A. Immenhauser
通讯作者：
A. Geske;S. Lokier;M. Dietzel;D. Richter;D. Buhl;A. Immenhauser