Jan. 14, 2014


Description

The presentation discusses two critical aspects of fracturing in cemented cased horizontal wells; the role of cement bond strength in fracture initiation, and the influence of spacing between perforation clusters on fracture width. It shows that opening of inclined and transverse fractures requires shear sliding between the formation and cemented casing. Strong cement bond or external casing attachments near the perforated interval hinder this shear sliding and hamper free opening of the fracture. If the initiated fracture is longitudinal, its opening causes tensile failure of the bond between casing and cement. This enhances the link between fracture and perforations and assists successful execution of the job. Close spacing between perforation clusters also results in fractures that are narrower than predicted by theories of fracture mechanics. Furthermore fracture width tapers quickly as it extend beyond the wellbore. Together these two mechanisms can explain why these types of fractures are known to occasionally encounter operational problems that include inability to inject at the planned rate during the early stage of each fracture and sudden screen-outs even with very low proppant concentration.

The presentation offers perforation recommendations for enhancing borehole/fracture connection, as well as guidelines for successful execution of the treatment.


Featured Speakers

Speaker: Ali Daneshy
Speaker Ali Daneshy
Ali Daneshy is President of Daneshy Consultants Int’l and adjunct professor in Cullen College of Engineering at University of Houston where he teaches a graduate course on hydraulic fracturing. He has over 40 years of experience in the technology and application of hydraulic fracturing and has published numerous papers on ...

Ali Daneshy is President of Daneshy Consultants Int’l and adjunct professor in Cullen College of Engineering at University of Houston where he teaches a graduate course on hydraulic fracturing. He has over 40 years of experience in the technology and application of hydraulic fracturing and has published numerous papers on the subject. At the present his main focus is on consulting and teaching short courses related to horizontal well fracturing. 


 

Full Description



Organizer

Matthew Strom

Email: matthew_strom@swn.com


Phone: 281-618-7848


Date and Time

Tue, Jan. 14, 2014

11:30 a.m. - 1 p.m.
(GMT-0500) America/Chicago

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

Greenspoint Club

16925 Northchase Dr.
Houston, Texas 77060
United States



Group(s): Northside