Methods for measuring nuclear magnetic resonance properties of an earth formation petrofu00ecsicas,For determination of properties of an earth formation petrofu00ecsicas volume in a boring hole, to make measurements of nuclear magnetic resonance of a geological formation, and.System for increasing the resolution of NMR logging data

摘要

Methods for measuring nuclear magnetic resonance properties of an earth formation petrofu00ecsicas,For determination of properties of an earth formation petrofu00ecsicas volume in a boring hole.In order to make measurements of nuclear magnetic resonance of a geological formation, and system to increase the resolution of log data of NMR.A method and system are disclosed for data acquisition of sequ00b3u00eancia echo NMR, and processing for better tracking of the error in the signal due to the effects of magneto acoustic known as touchBell, which are not canceled or otherwise adjusted.In one aspect,The method enables the correction of signs of bell sounds in a single pass through collection of a composite signal that includes echoes due to pulses to at least two different frequ00b3u00eancias. The choice of one or more frequ00b3u00eancias, the phase of the pulses and the recovery period allows the cancellation of the signal of bell sounds of echoes, including the echo of a pulse excitation.In another aspect,The method includes providing protection against errors due to the movement of the tool by the saturation of a relatively wide sensitive region with the echo signals collected from inside this signal sensitive.Relatively wide. The preferred ways of performing of the invention include one or more of the above aspects.