Research And Application Of Drilling Liquid Nmr Logging Technology In Shengli Oil Field

After the formation is drilled, a part of the pore fluid into the drilling fluid, gas, water logging methods corresponding to detect, but the drilling fluid in oil is always blank logging detection. This paper carefully analyzes the basic principle of NMR, the drilling fluid NMR of the repeated research and measurement experiment, the suitable drilling fluid oil content detection of nuclear magnetic resonance instrument performance parameters and experimental instrument for measuring parameters are obtained; through the influence, relative density of crude oil on the relaxation properties of 1D and 2D NMR instrument for drilling fluid oil rate of relaxation and relaxation agent experiment, determined the NMR measurement method for drilling fluid.Analysis of thick oil wells, gas wells in Shengli oilfield oil and mix well under three conditions of drilling for oil related research carried out by drilling fluid in nuclear magnetic resonance, oil drilling fluid analysis has a good effect. Therefore drilling liquid NMR logging technology as a detection method of drilling fluid of oil content, make up the conventional logging methods(cutting, gas logging) problems, not only improve the low reservoir oil and gas than the discovery rate, can have good application in the crude oil property and reservoir evaluation and true and false oil gas recognition and so on, to provide an important technical means for oil and gas exploration.