关键词: 葡萄花油层, 层序地层学, 层序界面, 体系域, 储层, 岩性油气藏

Abstract: Integrated study of high-resolution sequence stratigraphy for Putaohua reservoir in northern Songliao Basin is carried out for the first time. Based on observation and description of cores and outcrop, identification features of sequence boundary and lake flooding surface have been analyzed. The characteristics of well logging, seismic, mineralogy and geochemistry for each key boundary are summarized. At the same time, standard fossil organism with chronographic significance is applied to the high-resolution sequence stratigraphy, by which a uniform isochronous formation framework for the first member of Yaojia Formation in northern Songliao Basin is established (including Putaohua reservoir and overlying Sa-Pu interlayer).The first member of Yaojia Formation is divided into three sequences, where three system tracts of lowstand, transgression and highstand develop. It indicates the distribution model of reservoir, namely the three lowstand system tracts and early transgression system tract are the main development area of reservoir. So the disputes about several subdivision programs of purely cyclic correlation with well logging can be solved, the relationship between this subdivision model and traditional classification of oil layer sets by Daqing Oilfield Development System can be made clear, and the comprehensive application of information can be realized, which is of practical or immediate significance for the next exploration and development of Putaohua reservoir.

Key words: Putaohua reservoir, sequence stratigraphy, sequence boundary, system tract, reservoir, lithologic oil reservoir