Automated Managed Pressure Drilling Allows Identification of New Reserves in a HPHT Exploration Well in SB Field, Offshore Malaysia

Ismail, Zulkarnain; Aziz, Intan Azian Bt A; Umar, Lawrence; Nordin, Noor Azree; Rojas, Freddy; Zapata, Fernando Gallo; Garcia, Gregory Ignacio; Waquih, Ahmed; Subroto, Bramanta; Dow, Blain

doi:10.2118/151518-ms

Cited by 6 publications

(1 citation statement)

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“…Reitsma & Couturier (2012), Ismail (2012) and Godhavn (2010)), we consider other means of calculating the backpressure set-point. The control system consists of two cascade controllers, where the first controller feeds the set-point to the second controller.…”

Section: Introductionmentioning

confidence: 99%

Possibilities of Using Wired Drill Pipe Telemetry During Managed Pressure Drilling in Extended Reach Wells

2014

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Extended-reach wells with narrow pressure margins are complicated with respect to maintaining accurate pressure control during drilling. The high compressibility of the drilling mud that is typically used in such wells result in large pressure transients that need to be handled by the Managed Pressure Drilling (MPD) system. Also, limitations in sampling interval and delay in transmission time for downhole pressure measurements using mud pulse telemetry affects the ability to use the data.This paper presents results showing the benefit of using wired drill pipe for transmitting pressure measurements when drilling with back-pressure MPD in an Extended-Reach Drilling (ERD) operation. It is shown how minutes can be saved each connection by using wired drill pipe in combination with state-of-the-art MPD control algorithms. It is also shown how a combination of traditional back-pressure MPD, and wired drill pipe can significantly improve the ability to control down hole pressure. Measurements are generated synthetically by an advanced transient well flow model. The example cases are based on a real ERD well drilled recently in the North Sea.Benefits by this approach are the ability to minimize downhole pressure variations that will occur in ERD wells and, in particular, save time during connections, and also more accurate pressure control, and thereby safer drilling operations.

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Section: Introductionmentioning

confidence: 99%

Possibilities of Using Wired Drill Pipe Telemetry During Managed Pressure Drilling in Extended Reach Wells

2014

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Demonstrating the Value of Integrating FPWD Measurements With Managed Pressure Drilling To Safely Drill Narrow Mud Weight Windows in HP/HT Environment

et al. 2012

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The HPHT Exploration field is located in Block PM on the Northern side of the Malay Basin, Malaysia, and is notorious for its steeply rising pressure ramp, narrow drilling operation window with only 0.5ppg-0.6ppg in the 14-3/4" and 9-1/2" sections and inter-bedded sand/coal and shale formations Block PM is still at the exploration and appraisal stage and therefore there is limited petrophysical information. Well SBD-2 was the second attempt to reach and cross the F & H sands of this basin. This paper will detail how Formation Pressure While Drilling (FPWD) and Managed Pressure Drilling (MPD) were successfully applied to drill this HPHT exploration well with a very narrow safe mud weight window. FPWD provided a direct pressure measurement while drilling to set the lower boundary and the Dynamic Formation Integrity Tests (FIT) with MPD provided the upper boundary.All the benefits of using a fully automated managed pressure drilling system were necessary to reach Well TD for the first time in this field; including Early Kick Detection (EKD), Dynamic Formation Integrity Tests (FIT), Dynamic Flow Checks and Constant BHP control within a narrow pressure margin.The result of the combined technologies and operational procedures is safely drilling the first successful HPHT well in Malaysia drilled with MPD constant bottomhole pressure application. This well is so far the deepest gas discovery for the north Malay Basin.

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Anatomy of MPD Well Failures: Lessons Learned from a Series of Difficult Wells

Dow

Baker

Spriggs³

et al. 2013

SPE/IADC Drilling Conference

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Managed pressure drilling is a technique viewed as a means of improving the chances to drill the most challenging wells. Wellbore pressure management allows operators to address key technical risks such as narrow pore pressure and fracture gradient windows, sensitive wellbore stability environments and navigating steep and unknown pore pressure ramps. Certainly, the technology delivers added advantages while the drilling team attempts difficult wells. Successful execution, however, requires awareness of all aspects throughout the drilling process and full integration of the entire well construction team. Even best laid plans can encounter challenges that quickly become insurmountable. Despite being on alert, as is most often the case with MPD wells, misunderstanding subtle signs throughout the drilling process, poorly synchronized execution or untimely technical failures can lead to catastrophic outcomes for the operator. Additionally, it is not until execution when a full understanding of the wellbore sensitivity to pressure swings becomes apparent. The authors will look at a series of uniquely different wells, all employing MPD but for different technical reasons. Exploration drilling through challenging pore pressure ramps, high angle and horizontal wells across formations highly sensitive to pressure cycling, PMCD wells and wells drilled through very narrow pore pressure and stability window across depleted zones. Analysis of the detailed design during the planning phase, with the information that was known at that time, will lay the foundation of how each well was executed. In each case, the desired outcome was not achieved for reasons unique to the respective project falling outside the core MPD engineering design. Analysis of the failures will identify key lessons learned and show progressive continuous improvement that has made MPD critical to success on future projects and raised confidence of the users.

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Automated Managed Pressure Drilling Allows Identification of New Reserves in a HPHT Exploration Well in SB Field, Offshore Malaysia

Cited by 6 publications

References 0 publications

Possibilities of Using Wired Drill Pipe Telemetry During Managed Pressure Drilling in Extended Reach Wells

Possibilities of Using Wired Drill Pipe Telemetry During Managed Pressure Drilling in Extended Reach Wells

Demonstrating the Value of Integrating FPWD Measurements With Managed Pressure Drilling To Safely Drill Narrow Mud Weight Windows in HP/HT Environment

Anatomy of MPD Well Failures: Lessons Learned from a Series of Difficult Wells

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