Sept. 18, 2012


Description

 
To achieve optimal production from tight or unconventional reservoirs, it’s important to determine the permeability, pore pressure and state of stress of rock strata, including the caprock and underlying intervals.  Doing so will lead to properly designed hydraulic fracturing treatments, realistic predictions of well performance, and a basis for normalizing reservoir contribution when evaluating completion and stimulation effectiveness. 
 
A time-honored way to derive the necessary reservoir information is to conduct in-situ pressure transient tests.  Since it is difficult to inject fluid into or withdraw fluid from the pore network of ultra-tight rock, hydraulic fracture propagation can be used to provide the injection event.  A hydraulic fracture bypasses wellbore damage and near-wellbore stress concentrations and connects wellbore to a significant portion of the reservoir layer thickness.  Evaluating the pressure falloff response of small-scale hydraulic fractures enables reservoir transmissibility (kh/u) to be evaluated by a variation of the impulse testing method.  As well, the minimum principle stress is derived by identifying fracture closure.    
 
Consequently, diagnostic fracture injection testing (DFIT) has been used extensively in unconventional reservoir plays to gain insight into stress and transmissibility - yet with mixed results.  The presenter will briefly outline the basic theory and implementation process of DFIT and then discuss practical considerations that strongly influence the value we derive from these tests.  Examples will be used from DFIT projects in Eagle Ford, Bakken and Poland.  Items to be covered may include:
  • issues with horizontal wells
  • advantages of vertical wells
  • pay height uncertainty
  • interaction with natural fracture systems
  • complex fracture geometry
  • leak-off mechanisms
  • job sizing
  • shut-in time requirements
  • repeat testing
  • downhole shut-in methods   

Featured Speakers

Speaker Dave Cramer
Engineering Fellow, Global Completions Engineering ConocoPhillips Dave Cramer is an Engineering Fellow in the ConocoPhillips Global Completions Engineering group in Houston, TX. He has over 34 years of experience in designing, implementing and evaluating well stimulation treatments. Dave has authored 40 technical papers and is a co-inventor of 2 U.S. ...

Engineering Fellow, Global Completions Engineering
ConocoPhillips



Dave Cramer is an Engineering Fellow in the ConocoPhillips Global Completions Engineering group in Houston, TX. He has over 34 years of experience in designing, implementing and evaluating well stimulation treatments. Dave has authored 40 technical papers and is a co-inventor of 2 U.S. patents. His industry recognitions include the Henry Mattson Technical Achievement Award by the Denver SPE chapter in 1993 and the SPE International Completions Optimization and Technology Award in 2011.  He was an SPE Distinguished Lecturer from 2003-2004 and the SPE Region Director for the U.S. and Canada Rocky Mountain region from 2004-2007. Dave is a registered Professional Engineer in the state of Colorado.


Full Description



Organizer

Amy Timmons


Date and Time

Tue, Sept. 18, 2012

11:30 a.m. - 1 p.m.
(GMT-0500) US/Central

Event has ended

If you do not have a full-time job in the oil and gas industry, are a full-time student or Member in Transition (MiT) member, and you do not see a discounted registration fee for students/MiT regarding this event, please contact the GCS manager at spe-gcs@spe.org.


Location

Norris Westchase Center

9990 Richmond Ave., Suite 102
Houston, TX 77042