Abstract: A series of big-volume artificial marble with two-calibration-parameters was studied, it was used as photoelectric absorption index (the symbol is P_e) and density calibration standard for petroleum traditional compensated density/litho-density logging tools. It can save half of construction and storing cost, because a set of two-calibration-parameters standard can replace a sets of density standard and a set of photoelectric absorption index standard. The processing technology was obtained based on a series of experimental data, and the compact, fissureless artificial marbles with uniform density were produced, they were synthesized with unsaturated polyester. The density of the artificial marbles was measured with a special balance, and result was accurate to 1 gram.

Key words: litho-density logging tool, calibration, litho-density calibrator, big-volume artificial marbles