吴旗地区长61储层沉积微相及物性研究

Study of sedimentary microfacies and property in CHING 61 reservoir of Wuqi district

沉积微相和物性研究是油藏精细描述的重要组成部分,是储层预测和评价的基础。文章运用地质、测井等方法,对吴旗地区长61储层沉积体系进行了分析。以岩心资料、测井资料、地质资料为基础,结合沉积物粒度分析、岩心观察、取心井岩性和砂体分布特征,建立了吴旗地区长61储层的沉积相模式,并将沉积微相细分为水下分流河道、分流间、远砂坝、席状砂、河口坝5种微相类型。结合该区域地质背景资料,通过对吴旗地区长61储层单井相的划分,绘制了吴旗地区长61储层沉积时期沉积微相的平面展布图,分析了长61储层沉积微相在垂向上和横向上的变化规律。最终根据实验数据分析研究了吴旗地区长61储层的物性特征。

study of sedimentary microfacies and property is the important component of the fine reservoir description and the base of reservoir prediction and appraisal.Using geology,logging and other techniques,the author analyses the reservoir system of Chang 61 reservoir in Wu Qi District.Based on core datum,logging informations,seismic datum and geological datum,the author constructs the sedimentary mode of Chang 61 in the area and compartmentalizes five microfacies including subaqueous distributary channel,interdistributary bar,distal bar,sand sheet and mouth bar,combining pretreatments on size analysis,core observation,lithology of core hole and the distribution features of sand bodies.Through the classification of the phase in single well,the author maps microfaceis of different sedimentary epochs in Chang 61 reservoir of Wu Qi District and analyses alternation laws of the vertical and lateral sedimentary microfacies.Ultimately the author studies the physical property of Chang 61 reservoir in Wu Qi District based on the experiment datum.