【摘要】 利用测井声波速度、VSP速度和地震叠前相干速度反演方法对白云凹陷地层速度结构特征和影响因素进行了分析,认识到地层速度与海水深度不存在必然的联系,沉积环境不同造成的差异压实、地质异常体、海底底质及流体性质是造成地层速度异常的主要原因。更多还原

【Abstract】 The complexity of velocity structure in the deepwater area leads to distortion of the sedimentary layer structure and the difficulty of depth forecast,seriously hamper oil and gas exploration of the deepwater area.The authors analyze characteristics and influencing factors of velocity structure in the Baiyun Sag,by AL velocity,VSP velocity and coherent velocity inversion of pre-stack seismic.This paper finds that there is no necessary relationship of formation velocity and the water depth,and that the main reason of abnormal velocity is the differential compaction caused by different sedimentary environment,geological anomalous body,seabed sediment and fluid property.更多还原