Figure 2
From: Fracture-matrix fluid exchange in oil-bearing unconventional mudstones
(A) Cylindrical cross section of difference image indicating the concentration of Xe in delamination cracks, and the enhanced fluid saturation in the vicinity of the delaminations. By analyzing the column spectra we determine that Xe concentration is enhanced over a maximum length scale of ~ 7.5 mm from each crack (see D) below). This length scale is utilized to identify the diffusive region of interest (DROI) throughout the core. (B) The DROI is determined for each crack pixel using the morphLibJ Fiji plugin. (C) Schematic indication of half of a single DROI, and length scales used to quantify the Xe concentration in the vicinity of the crack. (D) Histogram of peak widths determined from column spectra shown in (A). While most cracks are characterized by an elevated Xe concentration spanning 0.2 cm, the Xe concentration is elevated over a maximum length scale of 0.75 cm. The step number corresponds to the equilibrium pressures shown in Fig. 1A, and the number in parenthesis indicates the total number of peaks identified by the peak fitting routine.
