裂缝储层的地震预测技术与应用实例
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摘要
裂缝性储层是油气勘探的重要储层类型之一,也是页岩气勘探的重点目标。本文针对中国深部陆相河流相碎屑岩裂缝储层,开展了系统的研究,包括VSP和三维地面地震采集设计、VSP处理与储层参数求取、VSP驱动的全方位地面地震数据处理、储层构造和储层沉积解释以及纵波地震属性、VSP信息和测井信息的综合解释,并最终获得了裂缝性储层的预测结果。通过研究认为,裂缝储层预测要以储层的构造、沉积解释为基础,对于陆相碎屑岩裂缝储层,需要储层沉积相解释才能正确预测裂缝性储层发育带。在此基础上,仍需进行油气成藏模式的研究,才能更有效地预测裂缝油气藏目标。
Fractured reservoir is one of important reservoir types for hydrocarbon exploration,and a major target for shale gas exploration.For fracture prediction of deep fluvial clastic reservoirs in China,we have conducted a series of researches including geometry design of VSP and 3Dfull-azimuth seismic acquisition,VSP processing and reservoir parameter estimation,VSP-driven surface seismic processing,structural and depositional interpretation,fracture prediction with attributes extracted from surface seismic P-wave data,and comprehensive analysis of VSP data and well logging data.Finally we obtain the prediction of fractured reservoirs.For reservoirs with continental facies,tectonic and sedimentary facies interpretations are needed to predict fracture-developed zones.On this basis,research on oil and gas accumulation model is needed to predict hydrocarbon-bearing fractured reservoirs.
引文
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