准噶尔盆地西北缘红003井区清水河组一段沉积微相研究及储层分布

Study on Sedimentary Micro-facies and Reservoir Evaluation of Qingshuihe Formation in Hong 003 Well Block,Hongshanzui Oilfield

红山嘴油田红003井区位于准噶尔盆地西北缘,是新疆油田公司2010年重点开发建设的一个主力油区。该井区白垩系清水河组稠油油藏于2007年发现,目前为该区块主力开发层系;但清水河组沉积相特征及砂体展布规律目前还缺乏深入了解。根据钻井、岩芯、测井及分析化验资料,结合前人研究成果,确定红山嘴油田红003井区清一段主要为冲积扇扇中亚相,可识别出辫状水道、砂坝、溢流沉积等微相;其中砂坝最有利储层发育。通过分析研究区沉积微相和单井储层分类结果,结合各小层孔隙度和渗透率平面分布特征,建立了该研究区的沉积微相平面分布图和储层分类评价平面图,为红山嘴油田的高效勘探开发提供了依据。

Hong 003 well block is located northwest margin of the Junggar Basin, and it is also the main oil region in the districts that Xinjiang Oilfield Company focus on the construction and development in 2010. The heavy oil reservoir of Qingshuihe formation in Hong 003 well block had been found in 2007, which is currently the main layer series of development block. At present, a thorough understanding of sedimentary facies features and the distributionof the sandbody of Qingshuihe formation is still lack. According to comprehensive studies of well logs, cores and other previous study, the kind of depositional system is the middle part of alluvial fan in the Qingshuihe formation is concluded and it could be further classified into three kinds of micro facies as the braided channel, the sand- bars and the overflow deposition. And the sand-bars sandbody reservoirs as the best is regarded. Distribution map of the sedimentary microfacies in the area is established based on intensive micro-facies analysis. Through analysis of the results of the single well reservoir classification, more precise description on the reservoirs classification rules in the study area. Research results of Qingshuihe formation in HongShanzui oil field provide a basis for reservoirs assessment, evaluation and development. The distribution map of the sedimentary microfacies and reservoir classification in this aera is established based on the analysis results of the single well reservoir classification and sedimentary microfacies, combining with the feature of porosity and permeability in every layer. And it could provide a basis for efficient exploration and development of this aera.