03525nmc a2200217 4500 20260520010352.0 260224s xxu PD I116 1 0015668 Baggini Almagro, Santiago 56685 Garcia, Viviane 57581 Ficetti, Silvina 56686 Silva, Paul Andres 57582 Congreso Latinoamericano y del Caribe de Perforación, Terminación, Reparación y Servicio de Pozos (3ro. : 2017 sept. 25-28 : Buenos Aires) 57483 Improving zonal isolation horizontal configurations Dynamic cement placement approach 5/6/2019 ; 08/11/2017 14 p. The increasing energy demand has led shale unconventional reservoirs to become a focal point for operators worldwide. Over the past decades, several technological advances conveyed to drilling and completing horizontal geometry wells in which ulterior massive hydraulic fracture treatments are deployed to improve production of these reservoirs, technically but not economically recoverable. Argentina, which counts with one of the largest shale-stored hydrocarbon reserves in the world, has become one of the leading countries in unconventional reservoirs completions, having horizontally-drilled wells number increased over the past decade. This fact has generated the need to find solutions operationally and economically viable to successfully cement horizontal wells, achieving proper zonal isolation. Since the difficulties encountered in Neuquén’s wells, such as channeling, differential fluid velocities, among others, most of them not possible to overcome, the need to implement casing movement while cementing as a practical solution had arisen. Studies have shown that displacement efficiency can top as much as 50 % when there is no pipe movement to increasing up to 100 % with movement, in which rotation shows to be the preferred pipe movement because of the azimuthal forces exerted on the fluid that cause it to be completely swept away around the annulus. The challenge is to incorporate previous experience in the field and introduce casing rotation for dynamic cementing. This mechanical method, although proven to be the most cost effective, has remained as one of the least accepted solutions, due in large part to the misconceptions and the fear that the high torques during the cement pumping/displacement will cause casing failures. In a recent campaign, the last well considered rotation in the production section-cementing job. Rotation was enabled from circulating mud prior cementing until displacement and bumping the plug. A rotation speed sensitivity was analyzed to determine the optimum angular speed and according to the torque capabilities (connections and surface equipment) an optimum rate of 30 rpm was proposed. This well was cemented obtaining congruent results from comparing bond logs and fluid placement simulations. This project focuses on the definition of the factors contributing to a successful cementing job in an horizontal geometry, the aspects that need to be analyzed from the cementing perspective when rotating casing to aid in mud displacement, and the evaluation related to the wells cemented under these circumstances compared to the simulated results predicted during the design phase of the well. https://biblioteca.iapg.org.ar/cgi-bin/koha/opac-retrieve-file.pl?id=31773744c015593b4e846c4413d4be91 CONGTP 191546 191546 0 0 0 0 259365 CDIAPG CDIAPG PD I116 1 0015668 2026-03-06 200063825 0 PD I116 1 0015668 200063825 2026-03-06 00:22:09 2026-03-06 ARCHIVO