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Co p yr ig h t 2 0 14 , IA DC/ S P E Dr illin g Co n fer e nc e an d E xhib itio n Th is p ap er wa s pr e pa r ed for p re se n tatio n a t th e 2 0 14 I A D C/S PE Dr ill in g C on fe re n ce an d E xhib itio n h e ld in Fo rt Wo r th, Tex a s, US A, 4 -6 Ma r ch 2 0 1 4.Th is pa p er wa s se lect e d for p re sen t atio n b y a n IA DC /S P E p ro g r a m co mmi tte e fo llo win g r e vie w o f in fo r matio n co n ta in e d in a n a b str a ct sub mitt ed b y the a uth or ( s). Co n ten ts o f th e p ap e r h a ve no t b e en re vie w ed b y the Inte r n a tion al A sso cia tion of Dr illing Co ntr a cto r s o r th e S o cie ty o f P etr o leu m E ng ine e rs a nd ar e su bje ct to co r re ctio n b y th e a u t ho r (s) . Th e m ate r ia l do e s n ot n e ce ss a rily re flec t a n y p o sition of the Inte rn a tio n al A sso cia tio n o f Dr illin g Co ntr a cto r s o r th e S o ciety of P etr o le u m En g ine e rs, its officer s, o r me mb er s. E lectr o n ic r e pr o d u ction , d istr ib utio n, o r stor a g e of a ny pa r t o f this p a pe r with o u t th e wr itten co n se n t o f th e In ter n atio n a l A sso ciatio n of Drilling Co n tr a cto r s o r th e S ocie ty of P etr ole u m E n g in e er s is pr o h ib ited . Pe r mis sio n to r e pr o du ce in p r int is r e str icte d to a n a b str act of n ot mo r e th an 3 00 wo r ds ; illu str a tio n s ma y n o t b e co p ie d . T h e a bs tr act mu st co n tain co n sp icu o u s a ckn o wle d g m e nt of I A D C/S P E cop yr ig ht. AbstractDeepwater wells traditionally feature two or three riserless sections that present a unique set of issues. Any oversight in managing these issues could increase the risk to the wellbore and jeopardize the safe delivery of the entire project. Recent successes in an operator's field in the Gulf of Mexico indicated improvements could be made to a process that has been commonplace for the industry. In this case, many complications often encountered during riserless drilling were overcome by utilizing technologies that had been previously used in later sections of the wellbore.T hese riserless sections have very soft, unconsolidated sediments, potential shallow water flow, torque-and-drag implications, positional uncertainty and close proximity potential to other wells in the field. This close proximity brings along another set of complications such as very large holes with concentric reamers, precise dogleg severity control, magnetic interference, and anti-collision issues. Any combination of these conditions may exist in a well.Operators may want to consider adapting existing technology as a more cost-effective, efficient, and safe solution to riserless drilling complications. This paper presents case histories from successful deployments of available technologies to meet the demands of riserless drilling challenges. Technologies in focus are rotary steerable systems, gyro measurement while drilling (MWD), survey management and acoustic measurements in large hole sizes.T he oil and gas industry strives to manage risk...
Co p yr ig h t 2 0 14 , IA DC/ S P E Dr illin g Co n fer e nc e an d E xhib itio n Th is p ap er wa s pr e pa r ed for p re se n tatio n a t th e 2 0 14 I A D C/S PE Dr ill in g C on fe re n ce an d E xhib itio n h e ld in Fo rt Wo r th, Tex a s, US A, 4 -6 Ma r ch 2 0 1 4.Th is pa p er wa s se lect e d for p re sen t atio n b y a n IA DC /S P E p ro g r a m co mmi tte e fo llo win g r e vie w o f in fo r matio n co n ta in e d in a n a b str a ct sub mitt ed b y the a uth or ( s). Co n ten ts o f th e p ap e r h a ve no t b e en re vie w ed b y the Inte r n a tion al A sso cia tion of Dr illing Co ntr a cto r s o r th e S o cie ty o f P etr o leu m E ng ine e rs a nd ar e su bje ct to co r re ctio n b y th e a u t ho r (s) . Th e m ate r ia l do e s n ot n e ce ss a rily re flec t a n y p o sition of the Inte rn a tio n al A sso cia tio n o f Dr illin g Co ntr a cto r s o r th e S o ciety of P etr o le u m En g ine e rs, its officer s, o r me mb er s. E lectr o n ic r e pr o d u ction , d istr ib utio n, o r stor a g e of a ny pa r t o f this p a pe r with o u t th e wr itten co n se n t o f th e In ter n atio n a l A sso ciatio n of Drilling Co n tr a cto r s o r th e S ocie ty of P etr ole u m E n g in e er s is pr o h ib ited . Pe r mis sio n to r e pr o du ce in p r int is r e str icte d to a n a b str act of n ot mo r e th an 3 00 wo r ds ; illu str a tio n s ma y n o t b e co p ie d . T h e a bs tr act mu st co n tain co n sp icu o u s a ckn o wle d g m e nt of I A D C/S P E cop yr ig ht. AbstractDeepwater wells traditionally feature two or three riserless sections that present a unique set of issues. Any oversight in managing these issues could increase the risk to the wellbore and jeopardize the safe delivery of the entire project. Recent successes in an operator's field in the Gulf of Mexico indicated improvements could be made to a process that has been commonplace for the industry. In this case, many complications often encountered during riserless drilling were overcome by utilizing technologies that had been previously used in later sections of the wellbore.T hese riserless sections have very soft, unconsolidated sediments, potential shallow water flow, torque-and-drag implications, positional uncertainty and close proximity potential to other wells in the field. This close proximity brings along another set of complications such as very large holes with concentric reamers, precise dogleg severity control, magnetic interference, and anti-collision issues. Any combination of these conditions may exist in a well.Operators may want to consider adapting existing technology as a more cost-effective, efficient, and safe solution to riserless drilling complications. This paper presents case histories from successful deployments of available technologies to meet the demands of riserless drilling challenges. Technologies in focus are rotary steerable systems, gyro measurement while drilling (MWD), survey management and acoustic measurements in large hole sizes.T he oil and gas industry strives to manage risk...
Most of the industry operators and service companies have developed and implemented a directional drilling collision avoidance rules based on strict controls to prevent well collisions and subsequent human and environmental damage. These rules are formulated based on best practices and mitigation procedures across the industry experience. However, these rules are sometimes found to be severely restricted to the optimal wellbore positioning of wells representing mainly the safe drilling to prevent surface or deep collision risks with offset wells. Historically ADMA-OPCO and ZADCO were adapting the basic collision avoidance rules from its shareholders policy and mainly depends on service companies' internal policy to rely on execution phase which was creating huge well spacing among drilled wells resulting in extreme narrow path for future well placement which was affecting field development severely. The need for a comprehensive collision avoidance practice and policy was eminent when the world- class ERD project with artificial Islands as drill centers was commenced in 2013, which instigated the process for developing a Wellbore positioning and collision avoidance policy for ADNOC offshore concessions operated by ADMA and ZADCO. In general the collision avoidance procedure should define on how to maximize the safety by avoiding or managing the collision with critical offset wells during the planning and execution phases of the drilling program. The scope of this document includes, but is not limited to, a set of anti-collision policies including standards, practices and guidelines to manage the master database structure and integrity, position uncertainty, surface location, survey program, collision avoidance procedure, wellbore survey operation, quality assurance, data integration and communication protocols to the interested parties, etc. Developed policies helped the drilling team to standardize the technical and operational consistency for safe planning, supervision and execution of directional drilling operation activities greatly. Outlining the roles and responsibilities of the well collision avoidance and wellbore positioning procedures eased the operation greatly in an offshore Artificial Island drill center environment with 100s of ERD wells being planned to be drilled. The brief technical details of verity survey technologies and surveys management advancements are covered in the guidelines to get an general education on subject matter to the end user which will help them to identify and finalize the survey program to drill the well safely. The detailed collision risk matrix and risk mitigation procedure guidelines has helped the drilling engineers to conduct the required risk assessment and mitigation plans in place during planning phase itself and supervise it during execution with enough control measures in place. The roles and responsibilities of each service companies involved is categorically mentioned in the policy allowing all parties to implement their contribution without failure.
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