Online nuclear magnetic resonance type analysis and detection device of oil content of drilling fluid

Abstract

The invention discloses an online nuclear magnetic resonance type analysis and detection device of the oil content of drilling fluid, which comprises an online drilling fluid sampling device and a low-field-intensity nuclear magnetic resonance device. The online drilling fluid sampling device comprises a power pump extracting device arranged on a drilling fluid pipeline and a sampling pipeline connected with the power pump extracting device; and the low-field-intensity nuclear magnetic resonance device comprises a probe device and a spectrometer control device, wherein the probe device comprises a detection coil around the sampling pipeline and a magnet arranged on the periphery of the detection coil, the spectrometer control device comprises a control computer, a signal receiving and transmitting change-over switch, a radio-frequency signal amplifier and a weak signal amplifier, wherein the signal receiving and transmitting change-over switch is connected with the detection coil, the radio-frequency signal amplifier and the weak signal amplifier are connected with the control computer and the signal receiving and transmitting change-over switch, and analysis and detection software of the oil content of drilling fluid is arranged in the control computer. The invention can conveniently and rapidly obtain the oil-water signal in the drilling fluid according to experimental requirements, so as to achieve the real-time analysis of the oil content and water content of the drilling fluid, to learn about the stratum information, and to provide rapid and effective drilling guidance.

Description

technical field [0001] The invention belongs to the field of nuclear magnetic resonance relaxation drilling fluid oil-water analysis, and in particular relates to an online nuclear magnetic resonance drilling fluid oil-containing analysis and detection device. Background technique [0002] Mud logging technology is the most timely and direct means to discover and evaluate oil reservoirs, and is known as the "eye" that goes deep into the ground. Drilling fluid, as the "blood" of drilling, can assist people to obtain first-hand information of formation information at the mud logging site. After the oil and gas layer is drilled, the drilling fluid is in contact with the oil and gas layer. At this time, there will be a large number of oil flowers and air bubbles in the drilling fluid. Through sample collection and later laboratory testing, these drilling fluids often contain crude oil, diesel and various oils. . So, is it possible to detect the oil-water content of drilling fl...

AI Technical Summary

Problems solved by technology

However, the traditional experimental method needs to obtain the core under the formation, bring it back to the laboratory for vacuuming, water seepage, and testing, and the real-time performance is poor.

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