LITHOGENESIS AS THE CAUSE OF ACOUSTIC AZIMUTHAL ANISOTROPY IN RESERVOIRS OF THE MIDDLE CASPIAN SHELF
Remarkable azimuth anisotropy of cross waves was revealed on two fields after carrying out cross dipole acoustic logging in rather homogeneous carbonate rocks of Upper Jurassic and sands of Low Cretaceous. Effects of azimuth anisotropy availability changed in quantity from well to well (for terrigeneus rocks) and were quite definitely identified only in intervals of collectors development. The article presents specific data of studying terrigenous and carbonate formations of the Middle Caspian Shelf, which were obtained through integrated analysis of cross dipole acoustic logging and core data.