Complexity and heterogeneity of carbonate deposits make the understanding of the reservoir quality challenging. This study is a contribution to the understanding of the distribution of carbonate–evaporite reservoir property of the Permo–Triassic Kangan–Dalan succession in one of the giant gas fields in the southwest of Iran. To capture and describe the complexity and heterogeneity of the carbonate reservoir, we defined different rock properties approach to the management of quantitative data on carbonate reservoir which is based on well and seismic data with an integrated sedimentological investigation, petrophysical evaluation, and seismic analysis to determine the new reservoir lithofacies classification. A lithofacies-based reservoir characterization study was conducted carbonate reservoir to build a numerical 3-dimensional (3D) geological model including reservoir property prediction for reservoir flow simulation. To do this, full suite of logs from six wells, core from four wells in the studied interval and 3D seismic volume across the studied interval have been involved and investigated. Five lithofacies were identified from detailed analysis, and the relationship between lithofacies and reservoir property was considered and geostatistically propagated in the studied area. This study shows that an integrated study using seismic data and well logs can be used to basically divide the reservoir into relatively homogeneous zones based on core and petrophysical analysis, and then evaluate each zone to distinguish high-quality zones. This approach provides useful insight to Permo–Triassic carbonate reservoir and other similar reservoirs and can also be effectively used in areas which lack well or outcrop data.

中文翻译：

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利用岩相和地震属性分布碳酸盐岩储层特性的综合方法：伊朗西南地区的案例研究

碳酸盐岩沉积物的复杂性和非均质性使得对储层质量的理解具有挑战性。本研究有助于了解伊朗西南部某大型气田二叠系-三叠系康安-达兰系列碳酸盐岩-蒸发岩储层性质分布。为了捕捉和描述碳酸盐岩储层的复杂性和非均质性，我们定义了不同的岩石属性方法来管理碳酸盐岩储层的定量数据，该方法基于井和地震数据，并结合沉积学调查、岩石物理评价和地震分析来确定新的储层岩相分类。对碳酸盐岩储层进行了基于岩相的储层表征研究，以构建数值 3 维 (3D) 地质模型，包括储层流动模拟的储层性质预测。为此，涉及并研究了来自六口井的全套测井数据、研究层段中四口井的岩心以及整个研究层段的 3D 地震体积。通过详细分析确定了五种岩相，并考虑了岩相与储层性质之间的关系，并在研究区进行了地质统计学传播。本研究表明，利用地震资料和测井资料的综合研究，可以根据岩心和岩石物理分析，将储层基本划分为相对均质的区域，进而对每个区域进行评价，区分优质区域。