胜坨气田明化镇组下段沉积微相特征及其与储层物性的关系

THE CHARACTERISTICS OF SEDIMENTARY MICROFACIES AND RELATIONSHIP BETWEEN SEDIMENTARY MICROFACIES AND RESERVOIR PROPERTY IN LOWER SECTION OF MINGHUAZHEN FORMATION SHENGTUO GAS FIELD

依据岩芯、测井、地震资料和储层地质学、测井地质学、地震地层学知识,可有效地解决气藏储层非均质性问题。通过对各种相标志的分析,发现胜坨气田明化镇组下段发育有曲流河沉积体系,其中包括河道充填、边滩(点坝)、废弃河道、天然堤、决口水道(次级水道)和泛滥平原等6种沉积微相。在此基础上,编制了不同小层的沉积微相平面分布图,揭示了该区的储层沉积特征,讨论了沉积微相对气藏储层物性的控制,指出了气藏开发的有利相带。

Through comprehensive analysis of lots of rock core, well logs, and seismic data, and combining the knowledge of reservoir geology, logging geology and seismic sequence, the reservoir anisotropism can be resolved effectively. Based on the analysis of single well microfacies, the reservoir character in the lower section of Minghuazhen formation has been studied. The results indicate that the Minghuazhen formation develops meandering river sedimentary system, which can be subdivided into six types of sedimentary microfacies-river channel, marginal bank, abandoned channel, natural barrier, crevasse channel and floodplain. And further, the reservoir sedimentary character of Ming formation has been revealed through different member of sedimentary microfacies plan, and the favorable facies zone has been located by means of discussion of the sedimentary microfacies control on the reservoir property.