Devices, systems and methods for assessing porous media properties

Abstract

Certain embodiments are directed to devices, systems and methods for determining a penetration depth of an induced oscillation in a porous medium. In certain examples, the devices, systems and methods are designed to detect a magnetic resonance signal in the presence of an induced oscillatory fluid flow in a porous medium to determine penetration depth of the induced oscillation in the porous medium. In some examples, the mobility of a fluid in the porous medium may be determined from the determined penetration depth.

Description

technical field [0001] Embodiments of the technology disclosed herein generally relate to devices, systems, and methods configured to determine the penetration depth of induced oscillations in porous media. More particularly, certain technical embodiments disclosed herein relate to devices, systems, and methods that can utilize magnetic resonance techniques to determine the penetration depth of induced oscillations. Background technique [0002] Measuring the physical properties of fluids in potentially petroleum bearing rock formations is difficult. Measuring mobility (permeability divided by viscosity) using logging methods typically requires measuring fluid flow while simultaneously measuring pressure gradients. These measurements are difficult to accomplish especially in downhole applications. [0003] Typical penetration depths for hydrocarbon-bearing rock formations may vary from about 0.1 mm to about 20 cm, more particularly, for example, from about 1 mm to about 10...

AI Technical Summary

Problems solved by technology

Leaks around the detector or unknown effects of empirically based correlations (eg, NMR decay rate measurements, mineralogy based estimates) can provide inaccurate results

Such problems make it difficult to measure physical properties of potentially hydrocarbon-bearing formations, such as mobility, particularly using logging methods

Images