4-D INVERSION OF GEOPHYSICAL DATA AND 4-D IMAGING METHOD OF GEOLOGIC STRUCTURE USING IT

摘要

A 4D inversion exploration method of geophysical data and a 4D imaging method of a geologic structure using the same are provided to generate a reliable underground image using one-time measured data by inverting plural monitoring data at the same time. Measured data are defined by spatial and temporal coordinates. A reference space-time model vector, which consists of plural reference space model vectors with respect to plural predetermined reference times, is defined, such that a space-time model vector of a time-varying underground structure is simulated. A value modeling approximation is performed for the underground structure models at various timings by using the Taylor series of values modeling plural reference space models. An inversion objective function is defined both in the time and space domains. The reference space-time model vector is obtained from the measured data defined in the time coordinates by using the inversion objective function. The space-time model vector is obtained from the reference space-time model vector and a time-varying underground component distribution is calculated.