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在安塞油田特低渗透储层沉积微相带研究工作中,利用多种测井响应提取单渗砂层沉积能量及其能量厚度信息,确认出三角洲前缘水下分流河道微相及河口坝微相骨架砂体的发育、规模及分布范围,有效地克服了层段中几个成因相近薄砂层或砂泥互层中砂层累加厚度识别和划分主体骨架砂体微相带的失误。通过研究区目的层段测井曲线和岩性、物性及其能量厚度统计,建立起单渗砂层能量厚度下限标准及夹层扣除标准,控制划分有利沉积微相带及其骨架砂体分布,为该区特低渗透油田增储上产提供有力依据。
In the study of sedimentary microfacies in the ultra-low permeability reservoir of Ansai Oilfield, a variety of well logging responses were used to extract information on the deposition energy and energy thickness of the single-permeability sandstone to confirm the delta front distributary channel microfacies and the estuarine dam The development, scale and distribution range of microfacies skeleton sand body can effectively overcome faults of recognizing and dividing the microfacies of the main skeleton sand body in several layers of sandstone or sand-mud interbeds with similar thickness. Based on the logging curve, lithology, physical property and energy thickness statistics of the target section of the study area, the lower limit of energy thickness and the mezzanine deduction standard of single-permeable sand layer are established to control the distribution of favorable sedimentary microfacies and its matrix sand body as The area of ultra-low permeability oil fields to provide a strong basis for increased production.