The Integrated Study Of High-frequency Isoparametric Induction Logging And It's Geologic Use

The high frequency isoparametric induction logging is different to the normal induction logging. Isoparametric is used in the design. In this paper, First introduce the geologic model of continental sedimentation, the rock physics expression about oil and gas reservoir of ShengLi Oil Filed. Terrestrial sediments can be found in ShengLi Oil Filed beginning from Permian to Tertiary. In addition, source beds are widely distributed . Terrestrial sediments consist mainly of fluvial and lacustrine facies have the following characteristics: Lacustrine basins have undergone a long continuous and fast subsidence and contain many terrestrial source rock sequences; sedimentary facies of terrestrial basins are deposited in a ring formation. The best source beds are the continental source beds which contain dark shale. The terrestrial sediments reservoirs are complexity and diversify, they are very important for reservoir evaluation, that districting bed boundary properly and stating the truthful resistivity of reservoir.This paper, the basic principle of high frequency isoparametric induction logging is introduced, the better advantage use in qualitative or quantitative interpretation are given. Then find out that the high frequency isoparametric induction logging can settle some problem occur in the terrestrial sediments's. The high frequency isoparametric induction have aided this broadening of the log interpreter's craft, and have brought the logging analyst closer to the related disciplines of geology, and reservoir engineering. The better advantage of high frequency induction in defining thin intercalated bed, discerning high-salinity low-resistivity oil (gas) reservoir, estimative of reservoir, estimating water-flooded reservoir and so on are found by analyzing the application of the many frequency induction logs in ShengLi Oil Filed. The results of research indicate that this tool has highly vertical and radial resolution. It can calculate accurately the invaded zone and the invaded radius. As we all new, mud filtrate invasion depth and pollution degree are two important parameters in the optimum perforation design. High frequency isoparametric induction logging is able to quantitatively determine the two parameters. According to the perforated depth request, types of perforation gun, petrol shaped charges and other special perforation techniques can be determined so to provide resources for perforation design. Now the high frequency isoparametric induction logging data more then 60 wells have been processed, including general oil-gas-water evaluation, low-resistivity oil zone evaluation, high-resistivity water zone evaluation, and the gas evaluation. The log method is a new way for the evaluation of difficult logging data interpretation.