Northside: Horizontal Well Fracture Initiation and Extension from Cemented Cased Wells

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

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.

Organizer Matthew Strom

Email: matthew_strom@swn.com


Phone: 281-618-7848

When?

Tue, Jan. 14, 2014
11:30 a.m. - 1 p.m. America/Chicago

How Much?

A $5 donation for the SPE-GCS Scholarship Fund has automatically been added to the registration fee. Use OptOut in the Discount Code field if you do not wish to donate at this time.
Event has ended

Where?

Greenspoint Club
16925 Northchase Dr.
Houston, Texas 77060
United States

Refund Policy: You must notify the SPE-GCS office of your intent to cancel at least 24 hours prior to the event date to receive a refund. For all refund inquiries, email spe-gcs@spe.org. View our Terms & Conditions for more information.