The fracture energy is directed toward rock of uniform rock strength within each stage by mapping the relative strength of rock across a stage and aligning that map with an accurate depth correction. There is much higher probability that fractures will initiate from all perforations and that proppant will be distributed more evenly throughout the completion stage. The result maximizes the amount of stimulated rock and minimizes gaps of non-stimulated rock. Fracture geometry (length and height) is more consistent and allows for greater confidence in development planning.
PerfAct tests tens of thousands of potential perforation depth combinations within each completion stage based on the OmniLog rock hardness profile and other relevant information such as gamma ray, gas detections, mass spectroscopy, and other measurements that might be available. Up to 18 individual parameters can be selected while running the PerfAct computations, and each can be weighted higher or lower relative to the others based on the characteristics of the well, reservoir, and operator preference. A solution that minimizes the standard deviation of MSE is produced in under one minute for each stage. Perforation recommendations for even the longest laterals can be generated quickly and reviewed in a very short time. Repeatability of results is assured by using this automated approach. Final outputs are backed by local basin expertise.
For best results, Drill2Frac recommends placement of marker joints at strategic locations within the casing string and correlating the wireline gamma ray/casing collar locator to the casing tally. This step minimizes the uncertainty in perforation depths during the completion – relative to their planned depths selected during the PerfAct evaluation.