A Successful Application of Fiber-Optic-Enabled Coiled Tubing With Distributed Temperature Sensing DTS Along With Pressures to Diagnose Production Decline in an Offshore Oil Well

Sari, I . Putu Eka Parta Winata; Parapat, Arthur; Burgos, Rex; Christian, Jonathan M.; Jamaluddin, A.K.M.; Rae, Graeme; Khor, Siak Foo; Ghani, Juanih; Musa, Muzily

doi:10.2118/121696-ms

SPE/ICoTA Coiled Tubing &Amp; Well Intervention Conference and Exhibition 2009

DOI: 10.2118/121696-ms

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A Successful Application of Fiber-Optic-Enabled Coiled Tubing With Distributed Temperature Sensing DTS Along With Pressures to Diagnose Production Decline in an Offshore Oil Well

I . Putu Eka Parta Winata Sari

Arthur Parapat

Rex Burgos

et al.

Abstract: In this paper, we present a field example where pressure and distributed temperature measurements enabled understanding of reservoir characteristics and fluid movement causing production hindrance in an offshore horizontal well.

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Cited by 4 publications

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Coiled Tubing Real-Time Downhole Measurements Reduce Total Exposure to HSE Risks

Morbelli

Altinkopru

2010

SPE International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production

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Through a series of examples, this study examines how real-time bottomhole data has reduced or mitigated the risks inherent to coiled tubing (CT) applications, leading to safer job execution. A number of tasks such as rigging up, mixing fluids, pumping, and rigging down are part of conventional CT interventions. Each of these tasks has risks associated with it. With the intent of optimizing CT operations, a fiber optic system was developed to enable real-time bottomhole measurements, allowing live monitoring of interventions. By providing real-time downhole intelligence, the technology has provided the means to operate more efficiently and enhanced the service quality and reliability of the CT services. More importantly, it helps optimize or minimize the tasks associated with conventional CT interventions, reducing personnel exposure to many of the risks. By providing a real-time casing collar locator (CCL), performing an extra dummy run is no longer necessary for all depth- critical operations. Reducing the number of runs not only reduces overall operational time, it also reduces personnel exposure to hazards related to these operations. Downhole pressure and temperature sensors have provided positive confirmation of gun detonation on CT perforating applications, reducing the risk of pulling out of hole with live guns. The monitoring of real-time bottomhole pressure provides a safer way to manage pressure by either assessing and obtaining the preferred perforating balance condition or validating the operation of the choke during a cleanout to avoid gas entry and to maintain a better control of the well. In applications such as matrix stimulations, cleanouts, or even nitrogen kickoff, the system has proven beneficial and effective in optimizing treatment volumes, consequently reducing extended cleanouts and associated flow back and flaring. Finally, this study evaluates the process of making informed decisions during execution of a CT job based on real-time downhole critical parameters and their impact on overall HSE performance.

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Coiled Tubing Real-Time Downhole Measurements Reduce Total Exposure to HSE Risks

Morbelli

Altinkopru

2010

SPE International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production

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A Successful Application of Permanently Installed Distributed Temperature Sensing (DTS) for Optimization of Acid Treatment in Power Water Injector with Advanced Well Completion: Case Study

Sharma

Al-Zain

Al-Salman

et al. 2010

SPE Annual Technical Conference and Exhibition

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With the advancement of technology and ease of drilling horizontal wells, producers/injectors are drilled with thousands of feet of horizontal section, to expose large reservoir areas for higher production/injection. To have a better flow distribution profile in heterogeneous formations, the producers/injectors are completed with Inflow Control Devices (ICDs) and external packers that provide compartmentalization to flow. The permanently installed distributed temperature sensing (DTS) fiber optic cable is externally attached to the completion, which is fed through the packers. This helps in obtaining distributed temperatures of all formations along the wellbore and throughout the horizontal section with high resolution. On-site analysis of the real time data from DTS could be used to optimize well treatments, such as acid stimulation. This paper presents in depth analysis of an acid stimulation performed on a power water injector in a carbonate reservoir. The well is completed with ICDs, DTS and a Permanent Downhole Monitoring System (PDHMS) for well and reservoir monitoring. The real time data acquisition of distributed temperatures coupled with online interpretation through a special software helped in building temperature profiles. Analyses of the temperature profiles were used for proper placement of acid and diverter stages. The post acid stimulation result was very encouraging with a significant increase in the well injectivity and even flow distribution along the horizontal section. The experience obtained from this job has been used as a basis for future stimulation jobs.

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Innovative Approach to Stimulate Horizontal Gas Well Using DTS Technology Combined with Coiled Tubing in Saudi Arabia

et al. 2010

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The objective of most acid stimulation treatments in Saudi Arabia’s Khuff carbonate formations is to remove drilling induced damage and achieve maximum well productivity. Open hole and multilateral completed wells, present several challenges that prevent an optimum intervention and placement of fluids with coiled tubing (CT). Traditional stimulation practices of these types of producers usually involve spotting fluid systems comprising multiple stages of pre-flushes, acid, and chemical diverting agents along the horizontal section of a well without adequate control over treating fluids’ placement and displacement. An innovative approach, combining fiber optic enabled coiled tubing (FOECT) and distributed temperature survey (DTS) recorded data with reservoir data to selectively place stimulation fluids in targeted formation sections, was successfully field tested in a dual-lateral horizontal gas well completed open hole in Saudi Arabia. This paper describes the job design, the operations performed to access the desired lateral, and the stimulation treatment performed combining the two technologies. Details on how the DTS technology was used to identify thief zones during the actual stimulation treatment, and how the placement of treatment fluids was optimized along the horizontal section, are also provided. The successful implementation of the first field trial has provided a strong incentive to utilize a similar approach in other gas producers currently scheduled.

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A Successful Application of Fiber-Optic-Enabled Coiled Tubing With Distributed Temperature Sensing DTS Along With Pressures to Diagnose Production Decline in an Offshore Oil Well

Abstract: In this paper, we present a field example where pressure and distributed temperature measurements enabled understanding of reservoir characteristics and fluid movement causing production hindrance in an offshore horizontal well.

Cited by 4 publications

References 9 publications

Coiled Tubing Real-Time Downhole Measurements Reduce Total Exposure to HSE Risks

Coiled Tubing Real-Time Downhole Measurements Reduce Total Exposure to HSE Risks

A Successful Application of Permanently Installed Distributed Temperature Sensing (DTS) for Optimization of Acid Treatment in Power Water Injector with Advanced Well Completion: Case Study

Innovative Approach to Stimulate Horizontal Gas Well Using DTS Technology Combined with Coiled Tubing in Saudi Arabia

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