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珠江口盆地陆丰A构造文昌组文五段储层类型主要为辫状河三角洲前缘砂体,为文昌组主要产油层段.该段储层横向变化大,非均质性强,因此准确识别砂体超覆边界对储量评价含油范围的圈定及后续油藏开发工作至关重要.研究区构造埋深大、断裂复杂,地震资料品质较差,深层反射能量弱,岩性组合特征多变,单一利用常规偏移地震剖面追踪解释进行砂体边界识别存在很大的不确定性.本次基于保幅纯波地震资料、钻测井资料及地质资料等,运用反射系数反演、阻抗反演、平面及剖面多属性综合分析等技术,对目的层砂体超覆边界进行了精细的识别与刻画工作,圈定了砂体边界,确定了含油范围,取得了良好效果,并对后期油田开发方案的制定和实施具有现实指导意义.
The reservoir type of Wenfeng Formation Wenwu Formation in the Pearl River Mouth Basin is mainly composed of braided river delta front sand body and is the main pay zone of Wenchang Formation with large lateral variation and strong heterogeneity, The overburden boundary of sand body is very important for the delineation of reservoir evaluation oil content range and subsequent reservoir development.Research area is characterized by deep buried structure, complex faults, poor seismic data quality, weak reflection energy, There is great uncertainty in the single identification of the sand body using the conventional offset seismic profile tracking and interpretation.Based on the preserved pure-wave seismic data, drilling and logging data and geological data, the inversion of reflection coefficient and impedance inversion , Plane and profile multi-attribute comprehensive analysis and other techniques, the target layer of sand body over the boundary of the fine identification and characterization work, delineated the sand body boundaries, to determine the oil content, and achieved good results, and late oilfield development program The formulation and implementation of a practical guide.