下寺湾油田雨岔区延7+8油层沉积微相研究

Research on sedimentary microfacies of Yan 7+8 reservoirs in Yucha area of Xiasiwan oilfield

基于测井资料、岩心资料、室内化验资料等,结合区域的地质背景,对工区沉积微相进行精细研究,依据沉积微相划分标志,认为工区属三角洲沉积环境,发育三角洲前缘沉积亚相,并主要发育水下分流河道、水下天然堤及分流间湾三种沉积微相。

based on well logging data,core data and laboratory testing data,and combining with regional geological background,the research on the sedimentary microfacies in the working area is detailed.According to the classification symbol of sedimentary microfacies,the working area is believed to belong to the delta sedimentary environment and develops the delta-front subfacies sediment,and mainly develops three kinds of microfacies,including underwater distributary channel,underwater natural barrier and interdistributary bay.