Entry and Exit Hole Analysis

Application

An established operator sought to verify the design and completion of a well by measuring the fracturing efficiency and the uniformity of proppant distribution throughout the well. HADES-R® assesses proppant distribution post-stimulation by measuring perforation erosional growth. Measuring changes in perforation open flow area requires extremely high-resolution 3D measurements to assess correctly, and this is where DarkVision’s HADES-R® tool provides unparalleled capabilities to evaluate proppant distribution and assess and validate the design of a well.

Results

By directly measuring the area of every perforation at the inner and outer casing surface with DarkVision’s HADES-R®, the operator received a detailed assessment of proppant distribution, uniformity of the proppant per stage, and an assessment of donor and thief stages caused by premature plug failure. This analysis allowed the operator to A/B test various completions designs, slurry rates, and concentrations and optimize all variables pertaining to their frac.

Results Are In The Details

Upon inspection, the operator discovered multiple stages were over-stimulated while other stages were under-stimulated. DarkVision’s high-resolution acoustic data empowered the operator to investigate the root cause and identify plug failures that were not detected during frac operations from surface pressure gauges, and improve subsequent frac procedures.

DarkVision’s HADES-R® tool scanned the entire well and measured all 1060 perforations in a single continuous high-speed pass. This enabled the operator to assess the completion, depth and phase placement of every perforation, isolation and depth of every plug, and identify any wall loss and connection makeup integrity defects all in a single run.