PZPS Event Matching and Simultaneous Inversion - A Critical Input to 3D Mechanical Earth Modeling

摘要

A3D Mechanical Earth Model (3D MEM) of a field was built integrating geophysical, geological, and petrophysical data. The 3D MEM represented the close-to-initial field property conditions, and is an ideal basis for analyzing wellbore and formation stability, subsidence and compaction, and cap-rock and fault sealing during initial and depleted field conditions. The lateral resolution of the elastic rock properties input for the 3D MEM was obtained using a PZPS simultaneous inversion of OBC data. Simultaneous inversion of PZ and PS data required adequate alignment of the two datasets. PZ and PS data were aligned by an automated event registration where major events were aligned in an iterative process refining the matching result with each iteration step.