A Guide to Relief Well Trajectory Design using Multidisciplinary Collaborative Well Planning Technology

Goobie, Roger Bisham; Allen, William T.; Lasley, Barbara M.; Corser, Kent; Perez, Jose Patino

doi:10.2118/173097-ms

Cited by 14 publications

(2 citation statements)

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“…The workflow is also designed to send real time, text, text to voice and email based on the real time anti-collision protocol to alert users on potential collision risk as drilling progresses. The system used to disseminate the real time messages to the end user is fully auditable and time stamped for traceability, (Goobie, 2015).…”

Section: Managing Well Collision Riskmentioning

confidence: 99%

Real Time Data Monitoring Experience Results in Enhanced Safety and Efficiency

Harder

Sutler

Sawaryn

et al. 2015

SPE/IADC Drilling Conference and Exhibition

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This paper is about BP's experience with Collaborative Real-time Environments (CoRE) including the Houston Monitoring Center (HMC), which has resulted in enhanced safety, rig site monitoring and its associated planning, and improved operational efficiencies. Real Time Monitoring Centers have been utilized by industry for some years to improve operational efficiency in drilling processes. BP (operator) has explored extending the effectiveness of such centers by embedding them in a CoRE. In its Gulf of Mexico operations area, this operator has been rigorously applying real-time data monitoring technologies on critical operations with the intent to enhance both safety and operational efficiency through more informed operational decision making. The results of this focused operation will be described in this paper.The term CoRE is used to describe the physical atmosphere and office arrangement of integrated teams, both operations and subsurface, sophisticated data monitoring applications and communications tools from the office to the rig site. Remotely monitoring key rig site data using highly trained and skilled personnel in a newly designed environment called a CoRE, has resulted in improvements in procedural discipline, efficacy in human factors as they relate to drilling and completion operations, and significantly improved operational decision making. These processes are underpinned by highly resilient systems and meticulous planning, delivering an uptime greater than 99.5%. To improve resilience of the system, the ability to transfer monitoring operations to an alternative location within a short time has been demonstrated repeatedly. This paper will describe the principles and demonstrated results from the CoRE philosophy.An additional benefit of having key data streaming onshore is regulatory compliance verification by the operations team, which also would allow external review by a regulator. This enhances the compliance verification significantly and allows additional items to be verified or inspected in less time and with less impact on the field operations. The potential benefits to both internal and external stakeholders including regulatory personnel are also described in this paper.The paper will detail the operator's journey on real time data monitoring of drilling operations which has been utilized by the company for several years. Included is a description of the numerous benefits resulting from applying advanced technologies in real-time monitoring (RTM) to the area of operational decision making including being aligned to potential future industry guidelines or standards. This paper describes the management practices which can be used to foster confidence between geographically separated team members because acceptance by field operations personnel is key to the success of any remote monitoring activity. Finally, the overarching management approach which has contributed to the success of this integrated effort is described by this paper.

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Section: Managing Well Collision Riskmentioning

confidence: 99%

Real Time Data Monitoring Experience Results in Enhanced Safety and Efficiency

Harder

Sutler

Sawaryn

et al. 2015

SPE/IADC Drilling Conference and Exhibition

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“…All relief well trajectories are planned to allow the locating and tracking of the target well, as described by others 7,8,23 . Up to this point, the casing design of the relief well would look like that of a pilot hole (as in Fig.…”

Section: Relief Well Planningmentioning

confidence: 99%

Blowout Prevention and Relief Well Planning for the Wheatstone Big-Bore Gas Well Project

Upchurch

Falkner

House

2015

Day 1 Mon, September 28, 2015

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The offshore Wheatstone LNG Project in Western Australia utilizes subsea big-bore gas wells as the preferred method of producing the field. Wheatstone wells use a 9 -5/8" production conduit from the top of the gas pay zone to the ocean floor. Well bores of this size are necessary to match the large productive capacity of the gas reservoirs they penetrate. This producing scenario provides the obvious benefit of yielding large volumes of gas through the use of relatively few wells. Each of those highly productive wells, however, also represents a source of gas that, if accidently allowed to flow unhindered, could present an uncommonly difficult well control challenge. It is for this reason that the Wheatstone Drilling and Completions Team evaluated a wide range of possible reservoir and well architecture scenarios to fully understand the possible scale of relief well responses that might be necessary in the event of a blowout. The conclusions from this evaluation were surprising. Our originally-planned well design concept called for penetrating the Wheatstone gas reservoirs with a casing shoe set 950m vertically above. Our analysis indicated that 3-4 relief wells would be simultaneously required to bring a blowout under control. Based on these results, both the well and the drilling execution plan were redesigned to minimize the number of required relief wells. In summary, the redesign amounted to setting casing immediately (i.e., Յ 3m) above the gas reservoir before actually penetrating it, with the resulting benefit of reducing the required number of relief wells to 2. Although this reduction is beneficial, it should be noted that there is only one documented subsea case where 2 or more relief wells have been drilled with the intent of simultaneously pumping into both to effect a dynamic kill. Given this fact, our well control-related preparations for executing this project were more extensive than that of preceding projects. This paper chronicles the full extent of the engineering and operational planning performed to ensure that no uncontrolled hydrocarbon releases occurred during the execution of the Wheatstone Project's subsea big-bore gas wells and, if a blowout were to occur, that the response to such an unprecedented event would be sufficient and robust. Covered in the paper are (1) reservoir deliverability modeling, (2) dynamic kill modeling, (3) gas plume modeling, (4) relief well trajectory and mooring planning, (5) pilot hole execution planning, (6) a newly applied LWD technology for sensing resistivity vertically below the drill bit and (7) a discussion of future research that has been identified as necessary to better define the fluid injectivity capabilities of subsea relief wells.

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