Oct. 17, 2007


Description

Pressure Variation Inside the Hydraulic Fracture and Its Impact on Fracture Propagation, Conductivity, and Screenouts

Field measurement of fluid pressure inside hydraulic fractures shows rapid pressure decline along the fracture length. Actual field measurements show the rate of this pressure decline depends on fluid injection rate. The consequence of this pressure profile is a large degree of shear fracturing and branching near the wellbore and a rapidly tapering fracture width. This means that a disproportionate volume of fluid and proppant injected inside hydraulic fractures remains near the wellbore, thus creating excessive near-wellbore and substantially less far-field fracture conductivities. This may explain why production history matching of oil wells yields much shorter effective fracture lengths than production history matching of gas wells, as oil wells, because of their higher permeabilities, require higher fracture flow capacities. 

The rapid tapering of the fracture width also restricts the movement of the proppant inside the fracture, causing its accumulation near the wellbore. As the treatment progresses, and if sufficient proppant volume has been injected inside the fracture, the near-wellbore segment of the fracture can begin to fill with proppant, thus reducing the open width available for further movement of the fluid, increasing the frictional pressure losses inside the fracture, further skewing the pressure distribution, and eventually causing a screenout. This fracturing phenomenon will be examined in detail in this presentation, as will its implications on hydraulic fracture design.

Please print and bring credit card receipt if paid on-line.
 
Please pre-register if you plan to attend.  Walk in registrations on the day of the meeting will be accepted for a limted number of seats based on the number of pre-registered attendees.  Thank you.

Featured Speakers

Speaker Ali Daneshy
President Daneshy Consultants International Ali Daneshy is the Director of Petroleum Engineering at the University of Houston and the President of Daneshy Consultants International.  His experience in hydraulic fracturing extends over 38 years and covers both its technical and operational aspects.  He has published over 50 technical and management papers, …

President
Daneshy Consultants International

Ali Daneshy is the Director of Petroleum Engineering at the University of Houston and the President of Daneshy Consultants International.  His experience in hydraulic fracturing extends over 38 years and covers both its technical and operational aspects.  He has published over 50 technical and management papers, most of them in the field of hydraulic fracturing.  He is a Distinguished SPE Member and currently serves on the SPE Board of Directors and as the Chairman of its Educational and Professional Activities Committee.  Ali received a Ph.D. in rock mechanics from the University of Missouri-Rolla.                       


 


Full Description



Organizer

Jeff Whittaker


Date and Time

Wed, Oct. 17, 2007

11:30 a.m. - 1 p.m.
(GMT-0600) US/Central

Event has ended

Location

The WestLake Club - Carriage Room

570 WestLake Park Blvd
Houston, Texas 77079