The execution of Open Hole Horizontal Gravel Packs (OHHGP) in ultra-deep waters (greater than 1500m) demands the use of the best technologies available. For the Atlanta Project, a detailed description of the first two wells successfully completed with OHHGP in the field, was provided in previous papers (OTC-25813, SPE-174893, SPE-174896). The third Atlanta well faced a new challenge: the integration of AICD technology (Autonomous Inflow Control Device) in the gravel pack screens. Due to the restriction imposed to the flow through the screens by the AICDs, the resulting pumping pressure and associated ECD (Equivalent Circulating Density) is increased, further reducing the already narrow operational window, which is common for reservoirs in such water depths. The use of AICD technology, which imposes an additional pressure drop to the aqueous fluid flow, further increases the pumping pressure, making conventional gravel packing strategies and procedures unfeasible. To overcome these new challenges, dozens of simulations were performed to address the new challenge and an innovative screen configuration was adopted to facilitate effective gravel pack placement while retaining the necessary fluid flow restriction of the AICD operating as per the simulation design during well production. Additionally, to ensure effective and complete gravel pack efficiency, a new pumping procedure, incorporating the use of three different proppant strategies, was implemented. By introducing these innovations, the third Atlanta well was 100% packed and the expected PI was obtained. Long-term performance, with the aid of tracers installed in the screens, is being evaluated. This paper will detail all the planning and execution phases that enabled completion of the first open hole gravel pack with AWES RP T2 AICDs in ultra-deep waters. Also in this paper, the production evaluation data is analyzed.

This paper aims to describe the successful use of AICD in Atlanta field, Eocene heavy oil reservoir located in ultradeep waters offshore Brazil. The HZ-OHGP with AICD installation and initial Atlanta's performance has been well described in previous papers (SPE-206153, SPE-199325, OTC-29757). This article will focus on the production analysis after 20,000,000 bbl produced in the field. The use of AICD for reducing water production has been extensively reported in literature (SPE 187288-PA, OTC-27992, SPE-174341-MS, SPE-195617, OTC-30445, etc.). Atlanta's application, however, differs from others mainly for two reasons: first, and more important, the HZ-OHGP with AICD was installed in a green field, in the 3rd well of the Early Production System (EPS), before any water had been produced in the field. Second, all 3 wells were completed with a massive amount of oil and water tracers (6 for oil and 6 for water per well), which allows for in-depth analysis of the AICD performance, and an unprecedented comparison with 2 offset wells. The results from the tracers indicate that the AICD achieved both objectives: equalizing the flux in the reservoir to the well and reducing water production, which, in Atlanta's EPS was especially important since the FPSO producing in this pilot project has limited water treatment capacity. After 45 months and the total EPS production of more than 20.000.000bbl for the 3 wells, the one completed with AICD still has the lowest BSW, the highest production rate and the highest cumulative production. These results will be deeply discussed in this paper.