Application of Inversion after Limestone Hollow-Out in Pearl River Mouth Basin

Abstract

The target layer of study area belongs to delta front and shallow shelf deposition, and the sedimentary formation is sandstone and mudstone thin interbed, the limy developed in sand layer. To make the inversion data reflect the characteristics of reservoir accurately, the methods of limy separation analysis by drilling and forward modeling have been used in this paper, and removed the limy from seismic data according to the characteristics of wave impedance（limestone hollow-out）. According to the research of limestone hollow-out Inversion, delta front sand bodies developed in the J2 formation of H district, and the J2 formation of H district where it is in the west of the study area, a gravity flow channel in the center, shallow shelf sand ridge sand bodies mainly developed in the eastern; delta front sand bodies developed in the J1 formation of HD district, which includes underwater branch channel sand body. A number of lithologic traps have been found and optimized by the research of Retrieval data near the large fault and ramp region, and also have achieved the intended purpose. This inversion method is a kind of reservoir prediction method based on seismic, geological and logging, which added in forward modeling techniques, and is an extension of Model seismic inversion method, and also Provided a new approach for reservoir prediction of the special lithological developed zone.