Perforating Long Horizontal Section with Tractor Brings Significant Gains in Completion Efficiency

Badri, Mohammed; Al-Masroori, Mohammed; Al-Hashimi, Ahmed; Jumaat, Mohd Shafie; Salsman, Alan Dean; Situmorange, Haposan

doi:10.2118/141639-ms

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…The slick profile of e-line tractors makes them ideal for the latter application, and they often represent the only or the most economic choice for many remedial interventions (Whiteley et al 2005;Schwanitz and Henriques 2009;Kueh et al 2010;Badri et al 2011;Nunez-Garcia et al 2012;Gomez et al 2013). A particular type of perforating guns, namely strip guns, are commonly used for very tight drift diameter applications.…”

Section: Introductionmentioning

confidence: 99%

Wellbore Investigation and Perforation of a Highly Deviated Well Using a Wireline Tractor and Strip Guns Offshore Angola

2014

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Since the early decades, through-tubing wireline (WL) interventions have been a necessary routine of the oil and gas industry. The practice of well intervention has benefited from the evolution of WL tools on its imposed quest to keep up with the trend of increasing complexity in wellbore and completion development.Deployment of WL tools through tubing, from early and simple devices (e.g., gauge cutters, lead impression blocks, tubing plugs) to state-of-the-art logging and well intervention prototypes, experienced a significant leap forward with the application of electric line (e-line) tractors in the mid-1990s. Since then, many oil companies have implemented the use of tractors to make a great variety of rigless well interventions feasible, both technically and economically.Over these lines, WL perforating of long, highly deviated wells through tubing, especially those with relevant ID restrictions, indubitably requires challenging, ingenious, and risked-assessed selection of the most convenient perforating and deployment systems. Working in remote locations, where availability of specialized tools and qualified personnel on short notice are often limited, adds an extra burden to the everyday complexity of operations.This paper describes the unconventional, but successful, use of a WL tractor to (1) investigate a tubing-conveyed perforating (TCP) completion failure and (2) save the highly deviated "S-shaped" well from a costly offshore rig workover by perforating with a strip gun deployed more than 14,000 ft from surface. The well is located in Angola at a water depth of 1,206 ft. IntroductionWithin the oil and gas industry, the term "WL" usually refers to a cabling technology used by operators to lower equipment or measurement devices into a well for the purposes of well intervention, reservoir evaluation, and pipe recovery.WL operations, and more specifically e-line interventions, have remained an essential tool for geological and reservoir evaluation (i.e., openhole logging), as well as a means to determine hole integrity and proper well construction (i.e., cased hole logging). Additionally, well intervention by means of e-line is a cost-efficient method of reaching operational objectives. The tools and equipment are conveyed into wells either through an "open hole" without surface pressure, or through special pressure retaining equipment, which allows the toolstrings to be conveyed into live wells with full production pressure. Key e-line workover activities include the setting of downhole tools (e.g., bridge plugs, packers, cement retainers, tubing cutters and punchers), perforating (casing and through tubing), and the use of diagnostic workover tools, such as casing collar/gamma rays (CCL/GRs), multifinger imaging tools (MITs), thermal multigate decay-lithology (TMDL) etc.The natural drive for e-line tools into the wellbore's target depth is gravity. E-line interventions, however, have been traditionally limited by wellbore deviation, and the conveyance of e-line tools through deviated tubing, would at be...

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Section: Introductionmentioning

confidence: 99%

Wellbore Investigation and Perforation of a Highly Deviated Well Using a Wireline Tractor and Strip Guns Offshore Angola

2014

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Wireline Tractor Conveyance - A Technology Game Changer for the Gulf of Thailand

Jongnarungsin

Puttisounthorn

2018

Day 1 Mon, November 12, 2018

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Easy oil is no longer low hanging fruit for oil and gas operators, and drilling targets are becoming increasingly ambitious, which results in escalation of the well trajectory complexity. This accordingly spirals the well and completion costs. To overcome this situation, technology must play a role to reduce cost, increase efficiency and ensure safety at all times. Conveyance is the key for any data acquisition and well completion activities. Historically, conveyance methods for data acquisition and perforation in highly deviated or horizontal wells required drill pipe or coiled-tubing methods. These methods are time consuming, labor intensive, require a larger equipment footprint, with possible HSE risks involved. Mubadala Petroleum in Thailand has seen a significant increase in horizontal and high deviated wells over the past few years. The wireline tractor technology has been used for the first time in Mubadala Petroleum's Thailand operations during the drilling, initial completion and workover intervention operations, and it has been a game changer for Mubadala Petroleum in Thailand in terms of reducing rig time, well cost, and most importantly minimizing the HSE risks. Over the past few decades, the oil and gas industry has developed the technique of drilling horizontally through the reservoir to maximize the surface contact area of the reservoir, to gain higher recovery and production. However, one downside from this technique is that it has become challenging and costly to perforate or to obtain measurements in this horizontal environment, as gravity will no longer support the wireline tools to reach to the bottom of the well. Wireline Tractor technology has played an important role to overcome this challenge. It reduces time, cost and will improve data quality as well as increase wellbore coverage. The wireline tractor functions with an electric over hydraulic power relationship, using its drive/wheel sections to push the passenger tool downhole as the cable is spooled off the unit allowing the tool to reach the end of horizontal or deviated wells without deploying drill pipe or coiled tubing conveyance methods. With this principle, any job that is typically run on electric wireline in a vertical well can be efficiently done in a horizontal or deviated well using wireline tractor. Material presented in the paper will be from actual operations, examples being tractor conveyed wireline logging tool and 4.5in Outer Diameter (OD) 90 ft heavy long perforation gun in single tractor operations. It will also display the operational efficiencies increases and risk reduction being obtained.

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A Case Study of the Successful Deployment of Tractor Conveyed Perforation in Highly Inclined Well

et al. 2016

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Well A is one of the only two wells on the XY reservoir structure providing the optimum drainage point on that reservoir. However, Well X had been shut in due to high sand production and had been flagged as ‘non-integral’ with regards to SPDC Well Integrity Management (WIM) policy due to its faulty Tubing Retrievable Surface Controlled Subsurface Safety Valve (TRSCSSSV). The well was thus scheduled for repairs. The objective of the workover operation as with most others done in SPDC was to restore integrity of the well, remediate sand control and improve production across the XY reservoir. On re-entry into the well, a mechanical restriction was met in the high angle section of the well thus impeding access to drain hole. A review of the situation, showed a possible collapse of the lower completions (sand screen) possibly due to high sand production. An attempt at sand clean-up was futile. This paper describes the unconventional but successful deployment of wireline conveyed perforation gun on tractor in SPDC to perforate this highly deviated well, thus, providing drainage access and recovering 2.14 MMstb of oil and 0.79 BScf of associated gas. Amongst several options including the use of coiled tubing or wireline as means of perforation, the tractor conveyed guns stood out for a highly inclined well such as Well A. The Well Tractor functions with an electric over hydraulic power relationship and uses its wheel section to push the passenger tool downhole as cable is fed off the electric line unit. The make-up of the tractor conveyed system makes it suitable for high angle wells while providing a cost savings over other systems.

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Perforating Long Horizontal Section with Tractor Brings Significant Gains in Completion Efficiency

Cited by 4 publications

References 3 publications

Wellbore Investigation and Perforation of a Highly Deviated Well Using a Wireline Tractor and Strip Guns Offshore Angola

Wellbore Investigation and Perforation of a Highly Deviated Well Using a Wireline Tractor and Strip Guns Offshore Angola

Wireline Tractor Conveyance - A Technology Game Changer for the Gulf of Thailand

A Case Study of the Successful Deployment of Tractor Conveyed Perforation in Highly Inclined Well

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