33 results about "High resolution nmr" patented technology

Methods and systems for determining location of hydrocarbon in unconventional plays are provided. The methods provide at least two steps of measuring formation samples as received, as dried and / or as saturated using high resolution NMR, and subsequent processing of the NMR data to determine one of several formation properties or components where the formation property or the component can be used to locate an oil or gas reservoir, complete a well, and / or increase production efficiency. Also, the present methods provide a series of sequential and ordered combination of steps related to the financial evaluation of number of barrels of oil or cubic feet of gas which can be produced at a location.

A high-resolution NMR probe is offered which is simple in structure and can be fabricated at low cost. The inside of the probe is maintained in a vacuum to adiabatically isolate the inside from the outside. Liquid helium is sent into a first heat exchanger located immediately close to a measurement portion via the innermost region of a triple tube placed in the vacuum. The helium is evaporated in the exchanger to cool a transmit-receive coil and a variable capacitor. The evaporated helium gas is returned via the outermost region of the triple tube. At this time, a radiation shield placed in the vacuum is cooled by a second heat exchanger placed in the return path.

An NMR measurement method adapted for measurements on solid mixture samples starts with irradiating a pulse sequence to the sample in order to measure the longitudinal magnetization relaxation times of nuclei possessing homogeneous longitudinal magnetization relaxation times (step 1). After a lapse of a given period of time t, a high-resolution NMR spectrum is acquired by nullifying spin diffusion across the nuclei (step 2). The steps 1 and 2 are repeated while varying the period of time t. The high-resolution NMR spectra are classified according to value of longitudinal magnetization relaxation time by inverse Laplace transform.

The utility model relates to an experimental device for nuclear magnetic resonance edge magnetic field imaging, which relates to nuclear magnetic resonance imaging. Equipped with servo motor, voice coil motor, coarse adjustment non-magnetic lifting platform, fine adjustment non-magnetic lifting platform, nuclear magnetic resonance edge magnetic field imaging probe, sample chamber, probe coil and sample relative movement / stationary conversion pin, coarse adjustment and fine adjustment non-magnetic Lifting table grating ruler and control system; the control system is equipped with a host computer, PMAC controller, servo motor driver and voice coil motor controller. Combining the two-stage lifting high-precision mechanical structure of coarse adjustment and fine adjustment with advanced closed-loop control algorithm, it can realize the high-precision movement of the sample with the highest precision of 1 μm, and complete the high-precision and high-resolution nuclear magnetic resonance edge magnetic field imaging. Two experimental methods, namely, the relative moving imaging between the probe coil and the sample and the relatively static imaging between the probe coil and the sample, can be realized without any secondary modification on an experimental device, which ensures that the strong magnetic environment is not affected to the greatest extent; the closed-loop control makes the sample The more precise the displacement, the more accurate the result.