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首页> 外文期刊>Petroleum Geoscience >Effects of depositional and diagenetic characteristics on carbonate reservoir quality: a case study from the South Pars gas field in the Persian Gulf
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Effects of depositional and diagenetic characteristics on carbonate reservoir quality: a case study from the South Pars gas field in the Persian Gulf

机译：沉积和成岩特征对碳酸盐岩储集层质量的影响：以波斯湾南帕斯气田为例

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摘要

The largest non-associated gas reserve of the world is hosted by the Upper Dalan-Kangan (Upper Khuff equivalent) Permo-Triassic carbonate-evaporite successions. Detailed characterization of these strata in the South Pars field has shown that the reservoir properties are a function of both sedimentary and diagenetic processes at the field scale. Facies analysis of the studied units indicates that the sediments were deposited in the inner regions of a homoclinal carbonate ramp and were subsequently subjected to shallow diagenesis and minor burial. The vertical distribution of the facies shows cyclic patterns that impact reservoir quality.The rock type classes have been grouped on the basis of the dominant pore spaces, and have enabled distinct fields to be identified. This approach has demonstrated a relationship between poroperm values and rock type groups. Diagenetic overprinting has significantly affected the reservoir properties.Although the original poroperm heterogeneities in the studied reservoir are inherited from the Upper Dalan-Kangan palaeoplatform, they have been modified strongly by diagenetic overprinting. Consequently, tentative correlation may be possible between facies types and reservoir properties based on diagenetic effects. Therefore, for precise characterization of the Upper Dalan-Kangan reservoir properties it has been necessary to integrate both the depositional history and diagenetic features.
机译：世界上最大的非伴生天然气储集层由上达兰-坎干（上库夫峰当量）二叠系-三叠系碳酸盐岩-蒸发岩层序组成。 South Pars油田对这些地层的详细描述表明，储层性质是油田规模上沉积和成岩过程的函数。所研究单元的相分析表明，这些沉积物沉积在单斜碳酸盐岩斜坡的内部区域，随后经历了浅成岩作用和较小的埋藏。相的垂直分布显示出影响储层质量的循环模式。岩石类型类别根据主要孔隙空间进行了分组，并能够识别出不同的油田。这种方法已经证明了poroperm值和岩石类型组之间的关系。成岩套印显着影响储层物性。虽然研究储集层中原始的poroperm非均质性是从上达兰-坎干古平台继承而来，但它们却被成岩套印强烈地修饰。因此，基于成岩作用，相类型与储层性质之间可能存在暂时的相关性。因此，为了精确地描述上达兰-康甘储层的性质，必须整合沉积历史和成岩特征。

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