Implementing Fiber Optics Distributed Sensing as a Key Surveillance Tool
- S. Al Shoaibi (Petroleum Development) | J. Kechichian (Petroleum Development) | R. Mjeni (Petroleum Development) | S. Al Rajhi (Petroleum Development) | G. G. Bakker (Petroleum Development) | G. Hemink (Shell Global Solutions International B.V) | F. Freeman (Shell Global Solutions International B.V)
- Document ID
- Society of Petroleum Engineers
- Abu Dhabi International Petroleum Exhibition & Conference, 7-10 November, Abu Dhabi, UAE
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Petroleum Engineers
- 4.5.7 Controls and Umbilicals, 4.5 Offshore Facilities and Subsea Systems, 2.1.3 Completion Equipment, 2.2 Installation and Completion Operations, 3 Production and Well Operations, 3 Production and Well Operations, 2 Well completion, 4 Facilities Design, Construction and Operation, 5.6.11 Reservoir monitoring with permanent sensors, 5.3.6 Chemical Flooding Methods (e.g., Polymer, Solvent, Nitrogen, Immiscible CO2, Surfactant, Vapex), 5.4 Improved and Enhanced Recovery
- Fiber Optics, DTS, Surveilance, DAS, Distributed Sensing
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Fiber Optics Distributed sensing technologies are evolving in the petroleum industry with its potential applicability in many areas of surveillance. Petroleum Development Oman (PDO) is embarking upon the implementation of this technology in various assets including both Gas and Oil fields. The vision of the company is to have the Fiber Optics distributed sensing technology as a surveillance tool in the Well and Reservoir Management (WRFM) toolbox and to become, where appropriate, a key element of its cycle. In comparison to conventional surveillance, fiber optic distributed sensing requires no well intervention and thereby reducing HSSE exposure and production deferment. In addition, the installed fibers can be used for multiple applications, e.g. hydraulic fracture performance monitoring and inflow performance monitoring. Recently, PDO trialed Distributed Acoustic Sensing (DAS) and Distributed Temperature Sensing (DTS) technologies utilizing both, dip-in surveys and permanent installation of fiber optics in the wells.
Fiber optic implementation in PDO included a polymer flooding trial in heavy oil, high permeability clastic reservoir with a strong bottom water aquifer drive. The objective was to monitor well conformance as the polymer injection progressed. The horizontal injectors were completed with pre-drilled liner and divided into four zones, each with an independent Inflow Control Valve (ICV). The well was completed with a multi-mode (MM) fiber pumped into control lines three injectors. Real time DTS data was acquired continuously in all three wells while DAS was acquired as per the injection program in one injector. DAS and DTS data were analyzed to quantify the changes in injection profile and rate in each ICV zone. This provided timely information needed for decisions related to manipulation of the ICV valves to ensure best utilization of the polymer.
Another example of fiber optics was a dip-in survey in a deep gas well with commingled production which covered stacked reservoirs. This was run in order to prove the concept of flow response on DAS/DTS signals in terms of gas flowing and liquid lifting detection. The acoustic signature observed was mainly due to gas entering the well through perforations. This was detected by DAS and DTS and allowed a qualitative inflow profile to be generated. The dip in survey proved the concept and allowed justification for the permanent installation of fiber optics behind casing. The objective of the permanent setup is to improve the sensitivity of the measurement and allow for better quantification of inflow per zone. In this paper, the approach of implementing fiber optic technologies in PDO is discussed with emphasis on value generation in the various assets. Additionally, the examples mentioned in this abstract are discussed in more details and based on the results, the way forward is described.
|File Size||1 MB||Number of Pages||11|
van der Horst, J., den Boer, J., in't Panhuis, P., Wyker, B., Kusters, R., Mustafina, D., Groen, L., Bulushi, N., Mijeni, R., Awan, K., Rajhi, S., Molenaar, M., Reynolds, A., Paleja, R., Randell, D., Bartlett, R., Green, K. 2014. Fiber Optic Sensing for Improved Wellbore Production Surveillance. Paper IPTC 17528 presented at the International Petroleum Technology Conference, Doha, Qatar, January 20-22.
van der Horst, J., in't Panhuis, P., Bulushi, N., Deitrick, G., Mustafina, D., Groen, L., Mjeni, R., Awan, K., Rajhi, S., Bakker, G. Latest Developments using Fiber Optic based Well Surveillance such as Distributed Acoustic Sensing (DAS) for Downhole Production and Injection Profiling. Paper SPE-175211-MS presented at the SPE Kuwait Oil & Gas Show and Conference held in Mishref, Kuwait, October 11-14, 2015.