A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Altered-Stress Fracturing
Altered-stress fracturing is a concept whereby a hydraulic fracture in one well is reoriented by another hydraulic fracture in a nearby location. The application is in tight, naturally fractured, anisotropic reservoirs in which conventional hydraulic fractures parallel the highly permeable natural fractures and little production enhancement is achieved by conventional hydraulic fracturing. Altered-stress fracturing can modify the stress field so that hydraulic fractures propagate across the permeable natural fractures. A field test was conducted in which stress changes of 250 to 300 psi (1.7 to 2.1 MPa) were measured in an offset well 120 ft (37 m) away during relatively small minifracs in a production well. These results show that stress-altered fracturing is possible at this site and others. Analytic and finite element calculations quantify the effects of layers, stresses, and crack size. Reservoir calculations show significant enhancement compared to conventional treatments. 21 refs., 12 figs., 3 tabs. (ERA citation 13:032244)
Altered-Stress Fracturing
Altered-stress fracturing is a concept whereby a hydraulic fracture in one well is reoriented by another hydraulic fracture in a nearby location. The application is in tight, naturally fractured, anisotropic reservoirs in which conventional hydraulic fractures parallel the highly permeable natural fractures and little production enhancement is achieved by conventional hydraulic fracturing. Altered-stress fracturing can modify the stress field so that hydraulic fractures propagate across the permeable natural fractures. A field test was conducted in which stress changes of 250 to 300 psi (1.7 to 2.1 MPa) were measured in an offset well 120 ft (37 m) away during relatively small minifracs in a production well. These results show that stress-altered fracturing is possible at this site and others. Analytic and finite element calculations quantify the effects of layers, stresses, and crack size. Reservoir calculations show significant enhancement compared to conventional treatments. 21 refs., 12 figs., 3 tabs. (ERA citation 13:032244)
Altered-Stress Fracturing
N. R. Warpinski (author) / P. T. Branagan (author)
1988
37 pages
Report
No indication
English
Mineral Industries , Reserves , Natural Gas Wells , Hydraulic Fractures , Cracks , Directional Drilling , Experimental Data , Field Tests , Finite Element Method , Flow Rate , Fluid Mechanics , Fracture Mechanics , Hydraulic Fracturing , Mathematical Models , Permeability , Reservoir Engineering , Reservoir Rock , Sandstones , Stresses , Well Stimulation , Young Modulus , Meetings , ERDA/030900
STRESS MEASUREMENT BY HYDRAULIC FRACTURING
| British Library Conference Proceedings | 1999
Jack fracturing technique of stress measurement
| Springer Verlag | 1977