US 12,259,516 B2
Downhole detection of lithium containing minerals by lithium 7 nuclear magnetic resonance
Songhua Chen, Liberty Hill, TX (US); and Christopher Michael Jones, Houston, TX (US)
Assigned to HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jul. 27, 2023, as Appl. No. 18/227,152.
Prior Publication US 2025/0035809 A1, Jan. 30, 2025
Int. Cl. G01V 3/32 (2006.01)
CPC G01V 3/32 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method comprising:
after a combined fluid is exposed to a magnetic field of a nuclear magnetic resonance (NMR) device, transmitting a radio frequency (RF) pulse into the combined fluid, the combined fluid comprising a first fluid and a second fluid, wherein the second fluid includes a relaxation enhancing agent, wherein a concentration of the relaxation enhancing agent is measured specifically to an element lithium to reduce a relaxation time of the lithium and allow an increase in a number of measurements of the lithium within a period of time which increases a signal to noise ratio (SNR);
conducting repetition measurements within the period of time from the combined fluid, by the NMR device, for responses to the RF pulse transmitted into the combined fluid;
identifying a concentration of lithium in the combined fluid based on the responses and SNR; and
identifying that a concentration of lithium in the first fluid corresponds to an extraction target.