扎格罗斯盆地中白垩统Sarvak组灰岩储层特征分析
Analysis of Limestone Reservoirs of Middle Cretaceous Sarvak Formation in the Zagros Basin
摘要: 中白垩统Sarvak组灰岩储层是扎格罗斯盆地最重要的含油层系之一。以岩心和测井资料为依据，对伊朗扎格罗斯盆地Z油田Sarvak组含油层段储层的储集空间、物性、沉积环境和储层控制因素等进行了分析。研究表明，该组储集空间类型主要为粒间孔和微溶洞，裂缝发育程度低，属孔隙型储层，孔隙度较高，但渗透率普遍较低。沉积相为浅海碳酸盐岩台地，主要发育局限台地、开阔台地、台地边缘浅滩三个沉积相带。含油层段储层自下而上划分为3个反旋回四级层序。储层物性受沉积环境和成岩作用的控制，碳酸盐岩台地环境控制了原生孔隙的发育，而成岩作用中的溶蚀作用可以溶解方解石胶结物，扩大孔隙和吼道，但胶结作用又可封堵孔吼，使储层变得致密。最后，针对储层自身特点，提出了开发建议。
Abstract: Middle Cretaceous Sarvak Formation is composed of limestone, which is one of the most important oil-bearing series in the Zagros Basin. On basis of core and well log data, the paper analyzes oil-bearing interval of Sarvak Formation in Z oil field of Zagros Basin, such as reservoir space, reservoir physical property, sedimentary environment, and so on. The results show that Sarvak Formation belongs to porous reservoir with high abundance of intragranular pores and micro vugs, and porosity is high while permeability is low. Sedimentary environment of Sarvak Formation is shallow marine carbonate platform, including restricted platform facies, open platform facies and platform margin shoal facies. Oil-bearing interval of Sarvak Formation is divided into 3 reversal fourth-order sequence from bottom to top. Reservoir was controlled by sedimentary environment and diagenesis. Carbonate platform environment determined development of primary pores. Dissolution could enlarge pores and throats by dissolving calcite cements, while cementation could densify the reservoir by plug these space. Reasonable development proposals are put forward according to reservoir characteristics of Sarvak Formation.
文章引用：刘厚武. 扎格罗斯盆地中白垩统Sarvak组灰岩储层特征分析[J]. 地球科学前沿, 2018, 8(8): 1267-1277. https://doi.org/10.12677/AG.2018.88138

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