Redefinition of Well Interventions in Naturally-Fractured Carbonate Reservoir Through Real-Time Coiled Tubing-Deployed, Fiber Optic Monitoring

2011 ◽  
Author(s):  
Rodrigo Aviles ◽  
Jose G. Flores ◽  
Frederic Martin ◽  
Alan Diaz ◽  
Luis Eugenio Davila De Garate ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Optic ◽  
Carbonate Reservoir ◽  
Coiled Tubing ◽  
Naturally Fractured ◽  
Fractured Carbonate

Successful Zonal Isolation in Complex Fractured Carbonate Scenario Using Thixotropic Gel and Hybrid Electric-Fiber Cable Coiled Tubing Technology

2021 ◽  
Author(s):  
Pasquale Pollio ◽  
Gianluca Fortunato ◽  
Salvatore Spagnolo ◽  
Gianni Baldassarri ◽  
Pasquale Cappuccio ◽  
...  
Keyword(s):  
Real Time ◽  
Carbonate Reservoir ◽  
Production Optimization ◽  
Successful Outcome ◽  
Single Fracture ◽  
Water Reduction ◽  
Coiled Tubing ◽  
Bottom Hole ◽  
Fractured Carbonate ◽  
Continuous Power

Abstract Water production has always afflicted mature fields due to the uneconomical nature of high water cut (WC) wells and the high cost of water management. Rigless coiled tubing (CT) interventions with increasingly articulated operating procedures are the key to a successful water reduction. In the scenario presented in this paper, high technological through tubing water shut off (WSO) for a long horizontal open hole (OH) well in a naturally fractured carbonate reservoir leads the way to new opportunities of production optimization. Engineering phase included sealant fluid re-design: the peculiar well architecture and fracture systems led to the customization of a sealant gel by modifying its rheological properties through laboratory tests, to improve effectiveness of worksite operations. A new ad-hoc procedure was defined, with a new selective pumping and testing technique tailored to each drain fracture. The use of Real-Time Hybrid Coiled Tubing Services (CT with fiber optic system coupled with real time capabilities of an electric cable) made it possible to optimize intervention reliability. Details of the operating procedure are given, with the aim of ensuring a successful outcome of the overall treatment Sealing gels are effective in plugging the formation, but in fractured environments the risk of losing the product before it starts to build viscosity is high. The success of the water shut off job has been obtained by using specific gel with thixotropic properties for an effective placement. In addition, the pumping has been performed in steps, each followed by a pressure test to assess the effectiveness of the plugging. Results are compared to two past interventions with equal scope in the same well: a first one with high volume of gel and an unoptimized pumping technique through CT and a second where a water reactive product was pumped by bullheading. The selective and repetitive approach pumping multiple batches of sealant system with CT stationary in front of a single fracture provided the best results from all three techniques. The real-time bottom hole data reading capability provided by hybrid CT allowed the placement of thru tubing bridge plugs (BP) with high accuracy and confidence with the ability to set electrically, therefore reducing risks related to hydraulic setting tools (i.e. premature setting). This also allows continual pumping during the run in hole (RIH) to clean up the zone prior to setting the BP. The combination of this innovative pumping technique and customization of the sealant fluid made it possible to achieve unprecedented water reduction in the field. The high technology CT supported the operation by providing continuous power and telemetry to the bottom hole assembly (BHA) for real time (RT) downhole diagnostics. Moreover, the operating procedures offer basic guidelines to successfully perform water shut off jobs in any other reservoir independent of its geological nature and structure.

Real-Time Fiber-Optic Coiled Tubing Delivered Well Intervention Savings Through Faster Decision-Making Process

2020 ◽  
Author(s):  
Marco Lerose ◽  
Luca Pelusi ◽  
Salvatore Spagnolo ◽  
Marco Scarso ◽  
Marco Colombo ◽  
...  
Keyword(s):  
Decision Making ◽  
Real Time ◽  
Fiber Optic ◽  
Decision Making Process ◽  
Coiled Tubing
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