Innovative Pressure Map Offers Insights on Frac Hits
Trent Jacobs, JPT Digital Editor
August 7, 2018
In less than 3 years after starting up, Reveal Energy Services’ first-to-market technique for interpreting offset-well pressure data has been used to monitor more than 5,000 fracturing stages.
Its chief deliverable is a pressure-based map of a well’s hydraulic fracture geometry—the length, height, asymmetry, and direction of the manmade hydrocarbon-conduits. These maps help producers understand how effective their completion designs are at stimulating tight-rock reservoirs, but the data used to make them has led Reveal to some deeper insights.
One of them may amount to an assessment of frac hit severity, which would give operators a clearer idea of whether new fractures directly impacted an offset well, or if the interference was due to more benign mechanisms such as a pressure front moving through the rocks.
URTeC: 2886118 – Estimation of Fracture Geometries From Poroelastic Pressure Responses in Offset Wells
We present a general method for estimating fracture geometries from offset pressure signals that is scalable to large, complex, multi-well pad operations. The method leverages validated theory and implementation from the domain of mathematical optimization to efficiently and effectively compute macro-scale fracture dimensions for many realizations, based on randomized initial conditions. These realizations establish uncertainty bounds for a global solution, which is determined by way of fine-scale refinement of a candidate solution drawn from the macro-scale results.
URTeC: 2902114 – Rapid Evaluation of Diverter Effectiveness From Poroelastic Pressure Response in Offset Wells
Unconventional Resources Technology Conference, July 23-25, 2018
The ability to determine diverter effectiveness quickly, cost effectively, as well as being operationally noninvasive has been troublesome for the industry. However, a unique approach that represents a significant change in evaluating diversion effectiveness has been developed using offset pressure measurements, enabling a process to help design a completion strategy to fully stimulate each stage, enhance cluster efficiency, and improve fluid distribution across the stage. The knowledge of diverter effectiveness provided by this approach shall lead to a better understanding of the diversion process and enable real-time optimization, where the results of a diverter stage are used to adjust treatment design for subsequent stages. These diagnostic measurements shall augment and enhance other diagnostic methods curr…