Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Extended reach, horizontal, and complex design wells: Challenges, achievements and cost-benefits

Conference ·
OSTI ID:372477
; ;
The paper describes Statoil`s experiences in drilling extended reach (ERD) wells, to primarily serve remote parts of widespread reservoirs and experiences in drilling horizontal and complicated wells, specially designed for optimal drainage of complex reservoirs. Several world records in extended reach drilling, conducted form the Statfjord C platform are summarized. The latest ERD well drilled has a horizontal reach of 7,290 m. Included are also the latest plans of implementing these techniques in developing new fields. A brief summary is given on the achievements within the industry regarding other special well types, such as dual lateral, snaky, multiple arm, etc. Furthermore, the paper describes technical challenges of drilling complex wells and how planning is done to cope with these challenges. Some limitations to the drilling are highlighted and solutions to drilling problems related to torque, drag, buckling, hole cleaning and surveying are given. Cost-Benefit considerations regarding ERD, horizontal and complex wells are discussed. Reducing number of platforms and/or leave out subsea templates due to ERD wells are considerable cost reducing factors. Reducing the total number of wells from a platform due to horizontal and/or complex well profiles is another major cost reducing factor.
OSTI ID:
372477
Report Number(s):
CONF-940879--
Country of Publication:
United States
Language:
English

Similar Records

Extended reach and complex designer wells demonstrate innovation
Journal Article · Mon Oct 31 23:00:00 EST 1994 · Petroleum Engineer International; (United States) · OSTI ID:6933792
Designing and drilling extended reach wells. Part 1
Journal Article · Mon Oct 31 23:00:00 EST 1994 · Petroleum Engineer International; (United States) · OSTI ID:6844867
Extended reach and horizontal wells experienced on the Statfjord field
Conference · Wed Sep 01 00:00:00 EDT 1993 · AAPG Bulletin (American Association of Petroleum Geologists); (United States) · OSTI ID:6964249

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DESIGN
DIRECTIONAL DRILLING
ENGINEERING
NATURAL GAS WELLS
OFFSHORE SITES
OIL WELLS
PLANNING