What do we know about the geometries of hydraulic fractures? Are they really as simple as the straight planes we usually assume in our reservoir simulations and fracture designs? What factors influence their geometries? What are the geomechanical mechanisms behind geometry complexities? How do our completion designs affect fractures geometries and what completion designs can reduce the adverse effects of geometry complications? What is the influence of fracture geometry on production?
Our recently published article in CDL’s Discovery Digest titled ‘Fracture Re-Orientation: The Impact on Completion and Production’ is trying to investigate these questions and present a general overview of the current knowledge of fracture re-orientation and curving in a simple language. The article briefly reviews several mechanisms responsible for fracture re-orientation and curving and their effects on the efficiency of hydraulic fracturing.
Below are some of the topics discussed in the article:
- Near-wellbore tortuosity and curving;
- Fracture bending, branching, merging and link-up;
- Curving potential in offset and infill wells;
- Effects of natural fractures and faults on hydraulic fracture geometry;
- Behaviour of fractures at lithological interfaces;
- Influence of production on fracturing and re-fracturing.