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本文通过岩性、电性、物性、含油气性四性综合研究,在大量生产实践资料基础上,提出鲕粒碳酸盐岩主要发育于碳酸盐岩——蒸发岩系列的上部海退次级旋廻之中,具有多旋廻结构,多产层的特点。主要岩类包括鲕灰岩及部分鲕云岩,形成于潮间——潮下极浅水鲕滩环境,受古隆起控制。鲕滩在海退过程中多次形成并暴露天水,在较高部位的坝、洲、脊受到淡水溶蚀,广泛形成负鲕灰岩,储集性良好,是油气储集的有利场所。本文论述了鲕滩的形成,微相区划及发展,与储集岩的分布规律。成果正在被生产部门采用。
Based on the comprehensive production of lithology, electrical property, physical property and oil and gas, based on a large amount of production practice data, it is proposed that oolitic carbonate rocks mainly develop in the upper part of the carbonate-evaporite series Among the class Xuan 迴, with multi-spin 迴 structure, multi-layer features. The main rocks include the oolitic limestone and some of the oolitic rocks formed in the intertidal-tidal shallow shallow oolitic beach environment controlled by the paleo-uplift. The oolitic beach formed and exposed Tianshui several times in the process of sea-regrowth. The dam, the continent and the ridge in the higher part were exposed to fresh water and extensively formed negative oolitic limestone with good reservoir property. This article discusses the oolitic beach formation, microfacies zoning and development, and the distribution of reservoir rocks. The results are being used by the production sector.