How does X-Ray Fluorescence work?
XRF is a diagnostic non-destructive testing technique that can be used to detect and measure the concentration of elements in a substance. Fluorescence is the result of electrons of a particular element being ejected by incoming radiation. The ejection causes electrons from higher energy orbitals to drop down and fill the void leading to a release of secondary X-Rays. The emitted X-Ray energies are different for each element. By analyzing secondary X-Ray spectra, one can determine what elements are present and their concentration in a given substance. The instrument scanning area is 1 cm in diameter and works best on flat, clean surfaces or cuttings in sample cups.
How is XRF different from XRD?
X-Ray Diffraction uses X-Rays to determine the crystalline structure of a material (Bragg’s Law). The angle and intensity of the reflection provides a spectra based on arrangement of atoms, which can be used to estimate the presence and concentration of a given mineral. X-Ray Fluorescence is used to determine the elemental composition of a material.
How long does it take to do XRF analyses?
Turnaround time for XRF projects are very quick, especially if a formation model has been established. Each sample runs for approximately two and a half minutes in the XRF Delta instrument. Once the data are collected, initial chemical logs can be sent within a few days.
Where can you do XRF?
The portable XRF instrument can be used to collect data from samples almost anywhere, post-drilling or during drilling, without interfering with drilling operations. Analyses can be performed on drill cuttings, core, or outcrop samples; archived samples can also be analyzed at the storage facility quickly, without the need for transport.
Is XRF non-destructive?
Yes, XRF is non-destructive!
What kind of information will I get form XRF?
XRF Solutions uses elemental data gathered by our instruments to create chemical logs, much like a wireline log. There are a variety different chemical logs available; these can be selected and tailored to your project. Some common logs developed are spectral gamma, trace metals, mineralogy, redox indicators, TOC estimates and mechanical properties.
- Please click here for more information about Applications of XRF
- Please click here to see more information about individual Basic Chemical Logs
- Please click here to see more information about individual Interpretive Chemical Logs
What other information is required to build an XRF model?
The XRF model building process is dependent on lab and wireline data provided by the client. The process works best when models are created in vertical wells with extensive reference data. Once a model is developed, future vertical and horizontal wells can be chemically logged using only XRF data .
Typical reference data used in the modeling process are wireline logs, XRD results, rock eval measurements, porosity/permeability values, Dean-Stark values, SEM images, production data and hydraulic fracture data.