Multi-information fluid evaluation technology application in horizontal wells with lost carbonate rocks

More and more oilfields develop carbonate rocks mainly through horizontal wells. The current logging methods for horizontal wells mainly include direct push logging and drill pipe transmission logging, with measurement items primarily focusing on natural gamma, resistivity, and acoustic data. However, due to the scarcity of logging data, as well as frequent occurrences of wellbore leakage and logging loss, the logging curves become distorted, and gas logging and cuttings logging cannot effectively return data, posing significant challenges to logging interpretation, especially fluid evaluation. The article analyzes data such as logging and core logging from a carbonate rock horizontal well, selecting parameters such as logging mud resistivity, GR/GR_matrix, resistivity, core logging chloride ion, and conductivity curves. It summarizes the formation of a multi-information fluid evaluation technique, which improves the accuracy of logging interpretation, supports development and production, and can serve as a reference for interpretation and evaluation of horizontal wells in carbonate formations under similarly complex conditions in other oilfields.