Abstract:

Oil exploration of Jiyang depression has recently been proved that Mesozoic,formations are favorable to hydrocarbon accumulation,and some oil reservoirs heve,therefore,been discovered. Based on well loge and. other imformation .available,the authors systematically studied the mineral composition,physical .pro-perties and distribution of reservoirs of petrologically complicated,Mesozoic in present region,and have developed a new .method. of log interpretation supported by an computer program. This method is based on geophysical inversion theory using optimization.method for calculation. It covers a log interpretation model established for lithologically complicated formation,and may be used for analyzing errors of well logs,correcting influence of various environmental factors for logs and checking geological parameters calculated. Geological results obtained by this. method in. processing log data on .Mesozoic formations of Jiyang depression are obviously.better than that by coventional digital processing method.