Optimization of Big-Bore HTHP Wells to Exploit a Low Pressure Reservoir in Indonesia

Benesch, J.M.; Nor, Nazri; Ngatijan, _

doi:10.2118/87171-ms

Cited by 13 publications

(1 citation statement)

References 9 publications

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“…The primary scope of the study was to review existing developments to understand field proven designs. The study focused on a global review 2,3,4,5,6,7,8,9,10,11,12,13,14,15,18 of ultra-high rate gas wells which included nine (9) areas and over 130 wells. 16 This study, combined with the experiential knowledge of the team, resulted in a design that integrated the field proven lower…”

Section: Feasibility Studymentioning

confidence: 99%

Design, Qualification, QAQC and Operational Performance of Completion Fluid, Reservoir Drill-in Fluid and Breaker - Tamar, Offshore Israel

Healy¹,

Sanford

Hopper

et al. 2015

SPE/IADC Drilling Conference and Exhibition

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A case history from Offshore Israel is presented that describes the successful delivery of five (5) ultra-high rate gas wells (ϩ250 MMscf/D) completed in a significant (10 TCF) gas field with 7 in. production tubing and an Open-Hole Gravel Pack (OHGP). Maximizing gas off-take rates from a gas reservoir with high flow capacity (kh) requires large internal diameter (ID) tubing coupled with efficient sand face completions. When sand control is required, the OHGP offers the most efficient as well as the most reliable, long-term track record of performance. A global study of ultra-high rate gas wells was made to select and finalize the design concept after which the commensurate engineering rigor was applied. This paper will highlight the design, qualification, Quality Assurance / Quality Control (QA/QC) and operational performance of the completion fluids inclusive of the Reservoir Drill-in Fluid (RDIF) and the breaker. Completion fluids are critical to the success and production efficiency of an OHGP. The completions were installed with minimal operational issues (Average NPT Ϸ4%). Production commenced on March 31, 2013. All wells have performed to expectations with maximum well rates up 340 MMscf/D.

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Section: Feasibility Studymentioning

confidence: 99%

Design, Qualification, QAQC and Operational Performance of Completion Fluid, Reservoir Drill-in Fluid and Breaker - Tamar, Offshore Israel

Healy¹,

Sanford

Hopper

et al. 2015

SPE/IADC Drilling Conference and Exhibition

View full text Add to dashboard Cite

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Reservoir Knowledge and Drilling—Benefits Comparison for Underbalanced and Managed Pressure Drilling Operations

et al. 2006

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The industry is now becoming more knowledgeable concerning underbalanced drilling (UBD) and managed pressure drilling (MPD). These techniques are gaining popularity because of their capability to control severe fluid losses and other problems that are inherent to conventional overbalanced drilling. As a result, considerable increase in their usage has been noted; however, with these increases, it has become apparent that there is a great deal of confusion concerning the basic concepts of each technique and when each should be used. Generally speaking, UBD can be described as a reservoir performance improvement and characterization tool that also provides drilling benefits. Another advantage is that UBD can offer a unique well testing environment in which the properties of reservoir layers can be determined while drilling. MPD, on the other hand, primarily addresses drilling-related problems that result in nonproductive time (NPT) in drilling scenarios. Sometimes, however, there are well scenarios in which both techniques might be needed in different hole sections. Reservoir information gained during underbalanced drilling also can help reduce the time and cost associated with gathering and analyzing well-test data post-completion with conventional methods. Techniques have been developed to quantify reservoir properties and characteristics for homogenous and heterogeneous and/or fractured reservoir systems. This paper focuses on where each concept should be used and what benefits can be expected from their application. Results from UBD and MPD case histories are used to quantify the results from these operations. Differences between the two techniques concerning equipment requirements and reservoir characterization potential are also analyzed. Introduction Many operators have chosen UBD and MPD to curtail severe fluid losses and other problems related to conventional overbalanced drilling. During operations focused on addressing drilling problems, some reservoir benefits have become apparent, convincing operators that with full underbalance, they may be able to realize improved production benefits. During UBD, comprehensive characterization of the reservoir while drilling can be obtained, and in some cases, zones that were unseen during overbalanced operations have been discovered, characterized, and subsequently appraised. Underbalanced and managed pressure drilling are not necessarily new technologies, but their potential has yet to be fully realized by the industry. Historically, the petroleum industry has been very slow to adopt "game changing" technologies. Granted, a handful of companies have taken a lead position in the employment of UBD and MPD techniques. These companies have already experienced the learning curves and no longer fear the step away from conventional drilling. However, a large part of the oil and gas industry needs further qualification and quantification for UBD and MPD. This paper will investigate the challenges that each technique can address and will compare the two techniques, the benefits each offers, and their applications. All drilling from conventional to air drilling could be considered as a form of "Managed Pressure Drilling," since for a drilling project to be conducted in the safest manner, the pressure must be controlled or managed. However, for purposes of this paper, managed pressure drilling will be considered as a discrete method, and discussions will focus on applications that are considered as "low-head" drilling applications.

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Produced-Gas Measurement Using Ultrasonic Metering During Underbalanced Operations

Wiemers

2007

All Days

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TX 75083-3836 U.S.A., fax 1.972.952.9435. AbstractThe accurate measurement of produced gas during underbalanced and managed pressure drilling operations is recognized as one of the most critical requirements for determining production capability of drilled producing zones, accurate wellbore flow modeling, quantifiable reservoir characterization, and for determining methods for well control.Most underbalanced equipment service providers currently use conventional orifice meters to measure annular gas flow during underbalance drilling operations. However, there are a number of disadvantages with the use of conventional orifice metering technology for this application. Such disadvantages include:1. Inaccuracies in flow calculations if incorrect gas compositions are assumed 2. Difficulty of measuring widely varying gas-flow rates and high turn-down ratios 3. Difficulty of rapidly removing and/or changing orifice plates when flow rates change quickly 4. Possible downstream equipment damage as the result of dislodged orifice plates. An ultrasonic meter can resolve some of the above problems, since it has no physical restrictions or moving parts, and therefore, the need to physically remove and/or change a plate due to varying gas-flow rates is eliminated along with the danger of damaging downstream equipment due to dislodged plates. The local computer provides for "hands-off" measurement once the electronics are calibrated and properly programmed. The meter is capable of turn-down ratios of over 250:1 to accommodate varying gas-flow rates. The electronic capabilities also provide automatic flow correction for rapidly changing gas composition. This paper discusses several lessons learned from designing and testing a portable ultrasonic metering system in

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Optimization of Big-Bore HTHP Wells to Exploit a Low Pressure Reservoir in Indonesia

Cited by 13 publications

References 9 publications

Design, Qualification, QAQC and Operational Performance of Completion Fluid, Reservoir Drill-in Fluid and Breaker - Tamar, Offshore Israel

Design, Qualification, QAQC and Operational Performance of Completion Fluid, Reservoir Drill-in Fluid and Breaker - Tamar, Offshore Israel

Reservoir Knowledge and Drilling—Benefits Comparison for Underbalanced and Managed Pressure Drilling Operations

Produced-Gas Measurement Using Ultrasonic Metering During Underbalanced Operations

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