Geophysical Research Letters
We present a fracture-mechanics-based formulation to investigate primary oil migration through the propagation of an array of periodic, parallel fractures in a sedimentary rock with elevated pore fluid pressure. The rock is assumed to be a linearly elastic medium. The fracture propagation and hence oil migration velocity are determined using a fracture mechanics criterion together with the lubrication theory of fluid mechanics. We find that fracture interactions have profound effects on the primary oil migration behavior. For a given fracture length, the mass flux of oil migration decreases dramatically with an increase in fracture density. The reduced oil flux is due to the decreased fracture propagation velocity as well as the narrowed fracture opening that result from the fracture interactions.
Jin, Z.-H. and Johnson, Scott E., "Primary Oil Migration Through Buoyancy-Driven Multiple Fracture Propagation: Oil Velocity and Flux" (2008). Earth Science Faculty Scholarship. 70.
Jin, ZH, and Johnson, SE, 2008, Primary Oil Migration Through Buoyancy-Driven Multiple Fracture Propagation: Oil Velocity and Flux: Geophysical Research Letters, v. 35, L09303. To view the published open abstract, go to http://dx.doi.org and enter the DOI.
© Copyright 2008 American Geophysical Union
publisher's version of the published document