油基钻井液环境下的录井方法及实践

油基钻井液以其良好的润滑性、抑制性而在稳定井壁、抑制地层水敏膨胀及快速钻进等方面有独特优势，在越来越多的各种高难度钻井中被采用。油基钻井液对传统录井有较大影响，尤其是岩屑的清洗辨认及油气显示识别。为了消除或减少其影响及干扰因素，得出可靠的录井结论，通过现场反复探索与实践，对油基钻井液条件下不同录井手段进行了有针对性的改进，总结了油气水评价方法。经过对比相关井的测井数据，验证了改进后录井方法的有效性和可靠性，说明对于油基钻井液录井，是能够找到一种有效途径以实现录井目的的。

Mud logging technique improvement and practice with oil-base drilling fluid

Due to the unique advantages of good lubricity and inhibition of oil-base drilling fluid in the aspects of stabilizing borehole wall, inhibiting formation water expansion and rapid drilling, it has been used by more and more various kinds of high difficult drilling wells. Oil-base drilling fluid exerted a great influence on traditional mud logging, especially upon identifying and cleaning of the cuttings, and distinguishing of oil and gas shows. In order to eliminate or reduce the influence and interfering factors of the oil-base drilling fluid and obtain the reliable mud logging conclusions, through on-site repeated study and practice, the corresponding improvements were made to various mud logging methods under the condition of oil-base drilling fluid, the methods for evaluating gas and water layers were summed up. Through contrasting with the well logging data from the correlative wells, the results were verified that the improved mud logging method had the features of validity and reliability, it showed clearly that mud logging purpose could be realized by finding an effective approach with oil-base drilling fluid logging.