Halliburton has locked in nearly half of Vaca Muerta's fracking work, anchoring a five-firm market with no room for a sixth provider.
Halliburton, the U.S. oilfield services company, booked 4,378 of the 9,714 stages completed across the Patagonian shale play between January and April, 45% of the four-month total and a near two-to-one lead over its closest competitor.
SLB, the world's largest oilfield services company (formerly Schlumberger), took 2,428; Tenaris, the Techint Group's tubular goods and well services subsidiary, 1,307; Calfrac, the Canadian pressure pumping specialist, 1,149; and SPI (Servicios Petroleros Integrados), the in-house services unit Pluspetrol built on Weatherford Argentina's former assets, closed the top five with 452 stages in its debut quarter.
The breakdown — drawn from monthly tracking by Luciano Fucello, country manager of NCS Multistage, a U.S.-based well completion services company, and chairman of Fundación Contactos Energéticos, an Argentine industry association — leaves no work for anyone else: the 9,714 stages distribute across these five providers with no remainder.
Two U.S. firms — Halliburton and SLB — between them account for 70% of all fracking work; Tenaris, Calfrac, and Pluspetrol's new in-house unit split the balance. The concentration tightened further in April, when YPF, Argentina's state-controlled oil and gas company, locked Halliburton into an exclusive five-year contract for four electric fracturing fleets — a move that closes off Halliburton's most advanced technology to every other Vaca Muerta operator for the contract's duration.
Whether the structure holds beyond that window will depend on factors the data cannot yet resolve: how the rest of the basin's operators reorganize their service ecosystem, whether Pluspetrol's vertical integration model is followed by other large producers, and whether the ongoing U.S. shale slowdown continues to free up premium frac fleets for international redeployment.
Pluspetrol Becomes Operator and Supplier
SPI — short for Servicios Petroleros Integrados, per Argentina's corporate registry — took over Weatherford Argentina's fracturing set, operational bases, and entire workforce in February 2025, in a transaction Pluspetrol chained to its earlier $1.75 billion acquisition of ExxonMobil's Argentine shale portfolio, including the Bajo del Choique–La Invernada block in the western Neuquén Basin.
The result is a double vehicle for Pluspetrol, the Argentine independent oil and gas producer, in Vaca Muerta: an operator arm that closed the four-month period as the basin's second-largest producer with 1,190 stages, and a service arm whose 452 stages already match the pace that Tenaris and Calfrac were running a year ago.
YPF ran 4,431 stages — 46% of the four-month total — and maintained the operational dependence on Halliburton that has marked the Neuquén shale's activity since the start of large-scale development.
The 4,378 stages Halliburton completed during the period correspond almost one-for-one to YPF's 4,431, a geometric match that confirms how tightly the basin's largest operator and largest service provider have been working in tandem.
Behind Pluspetrol came Vista Energy, the independent Vaca Muerta-focused producer, with 975 stages; Tecpetrol, the Techint Group's exploration and production subsidiary, with 699; Pampa Energía, the diversified Argentine energy company, with 647; and Pan American Energy (PAE), Argentina's largest private oil producer, with 605.
The bottom half of the operator ranking went to Shell Argentina, a subsidiary of the Anglo-Dutch energy major, with 446 stages; TotalEnergies, the French energy major, with 426; Phoenix Global Resources, the London-listed Vaca Muerta producer, with 182; and Chevron, the U.S. energy major, with 113.
Zeus Exclusivity Closes the Top of the Market
Halliburton's dominance moved beyond arithmetic in April. The company closed the exclusive five-year contract with YPF for four electric fracturing fleets under its Zeus platform, bundled with the OCTIV AutoFrac automated pumping system. The first set arrives in October, and the deal is the first international deployment of Zeus outside the United States.
Each Zeus unit delivers 5,000 hydraulic horsepower, double the per-unit power of a conventional diesel set. On the publicly reported deployment with Coterra Energy, the U.S. shale producer, in the Permian Basin, the technology added roughly 17% in effective stage velocity per fleet.
The move has an immediate secondary effect on the rest of the oligopoly: the nine other operators active in Vaca Muerta — between them accounting for 5,283 of the 9,714 stages — are left competing for sets from SLB, Tenaris, Calfrac, and SPI. Pluspetrol, Vista, Tecpetrol, Pampa Energía, PAE, Shell, TotalEnergies, Phoenix Global Resources, and Chevron will not have access to Zeus during the five-year window.
The move also tracks with the direction the global market is taking. Rystad Energy, the Norwegian energy consultancy, projected in its December 2025 review that fracturing programs would extend toward longer laterals and toward at-scale execution of simultaneous, trimul and quattro fracs with continuous-pumping techniques — trends that, taken together, support another efficiency leap in the coming years.
Rystad also documented the Argentine counterpart: the Permian Basin, West Texas's prolific shale oil-producing region, saw its rig count fall from 302 platforms in the first quarter of 2025 to 250 in the fourth, according to figures cited by Nine Energy Service, the U.S. well services company.
Halliburton and SLB have been freeing up capacity in the Lower 48 and redirecting it to Vaca Muerta, where the $59.62/bbl average price of West Texas Intermediate (WTI), the U.S. crude benchmark, in the fourth quarter of 2025 did not dent Argentine demand. That resilience is sustained by YPF's reported shale lifting cost of $4 per barrel.
More Stages, Same Sets
The four-month total puts the formation on track to surpass Fucello's full-year 2026 projection of 28,040 stages — a 22% year-on-year increase — before the first half is out. Annualizing the January-April run rate yields 29,142 stages, and the gap between fracturing growth (+22.8% year-on-year) and Neuquén crude production growth (+36.18% in April, according to the provincial Hydrocarbons Sub-Secretariat) marks the operational efficiency leap the basin has accumulated while the equipment fleet has held steady.
The split between windows also confirms activity's bias toward oil: 7,736 stages in shale oil (80%) against 1,978 in shale gas (20%), a mix aligned with the expansion of liquid takeaway capacity following the Oldelval Duplicar Norte project and with the Vaca Muerta Oil Sur (VMOS) pipeline timeline toward its first export cargo.
The active set fleet in Vaca Muerta remains concentrated in around a dozen units split among the five providers. The gap between Halliburton's 4,378 stages and SLB's 2,428 is not one of installed capacity but of effective utilization and shift coverage. The four Zeus electric fleets contracted by YPF will arrive as additional capacity from the fourth quarter, not as replacements for the current diesel fleet.
Fucello's 28,040-stage projection assumes those same sets keep operating at record cadence. Any sustained mechanical setback across so small a fleet puts the target at risk.
The Weatherford-to-SPI handover, Halliburton's consolidation at the top, the exclusive lock-in with YPF, and Pluspetrol's vertical integration set the terms for what follows. Eight months remain for the basin to deliver the remaining 18,326 stages required by Fucello's annual projection. The bottleneck is no longer the rock; it is the availability of frac sets and the technology that electrifies them.