In order to economically develop the Albian Carbonate Macae formation in the Campos Basin Deepwater Brazil an extended reach horizontal well is required. Due to the tight nature (low permeability) of the rock, stimulation of the reservoir is required. Completion designs and techniques for treating extended reach horizontal wells in deepwater are limited. Most applications for these type wells in Deepwater are ineffective (high skin/low PI) and inefficient (trip/time intensive) affecting project economics. A completion system was developed that allows for safe, effective and efficient stimulation and installation of such an extended reach horizontal well in Deepwater. This paper will describe the design, testing and execution of a unique Deepwater completion system that adapts a known multi-stage ball drop system used in onshore unconventional reservoirs, for example the US and Canada, to a known horizontal open hole sand control system to effectively matrix acidize a 2000 m horizontal open hole thru a Limited Entry Liner with reservoir segmentation. The system uses a Retrievable Ball Drop Diversion System (RBDDS) consisting of multi-stage frac sleeves run on wash pipe. The RBDDS is run inside a limited entry liner that is segmented into stages or intervals by openhole programmable interventionless packers (Mendes et al. 2014) all run in a single trip and with no pipe manipulation required while stimulating. It furthermore leaves behind a robust lower completion system for the life of the field. This 2000 m lower completion system was successfully run in the Albian Carbonate reservoir and all stages treated with 15% HCl with minimal NPT, no harm to people or environment. At the time of completion, this well was the longest horizontal reservoir section and longest step out well drilled and completed in Brazil. This Limited Entry Liner System together with the RBDDS proved to be a very efficient, effective and deepwater friendly system. Introduction Low permeable deepwater carbonate reservoirs have created many challenges to produce economically. The wells typically require extensive reservoir contact that has to be stimulated in order to achieve an acceptable Productivity Index, PI. Field A, Albian Carbonate in the Campos basin offshore Brazil falls into this challenging category. Effectively stimulating long horizontals has long been an industry challenge onshore and even more so in a deepwater environment. With the advent of Unconventionals in the US and Canada the ability to stimulate long horizontals has generated a great deal of focus and effort over the last few years. The high rate and multi-stage fracture stimulations done on these wells has resulted in the development of new industry techniques, notably using frac sleeves operated by dropping balls, and pumping down plugs and perforating guns to isolate and perforate each stage. This paper will review the concept selection process, detailed design work, testing, and implementation results of an extended reach horizontal well that utilizes onshore Unconventional ball drop technology adapted to a Deepwater setting to effectively stimulation a 2000 m long horizontal section. The well and stimulation treatment was considered an apparaisal effort such that if the production from the well is suitable it will open up the full Albian Carbonate for further development.

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Interest in hydrocarbon-bearing carbonates as well as emerging extended-reach horizontal well technology for sandstone reservoirs has caused the need for reliable zonal isolation to receive substantial attention. Solutions for isolating more permeable sections of the reservoir from those less prone to produce in an economically favorable flow rate in a horizontal well often employ swell packers, whose major drawback is a long inflation period. This paper presents the successful installation of thirteen remote set packers in an offshore well for a major IOC in Brazil.Twelve of the packers were set in openhole and one was set near the 9 5/8-in casing shoe. The device encompasses a programmable electronically controlled setting mechanism that includes a pressure sensor, temperature sensor and a countdown clock. Utilization of the new technology enabled the operator to set the packers faster than swell packers, saving 2 days of rig time.The completion design comprised setting the packers sequentially from heel to toe, only a few minutes apart, by holding pressure inside the string against the openhole wall. Using actual drilling data, the packers were programmed with the desired pressure and temperature parameters prior to running in the hole. Upon reaching the setting depth, the work string pressure was increased and monitored through the cement unit. In less than one and a half hours, all thirteen devices were successfully set and observed through real-time monitoring of the cement unit's pressure transducer.The paper presents the device concept, describes the complete sequence of pre-job preparation and reveals the installation outcomes.

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