Flow Assurance
Sygma Energy provides targeted chemical and mechanical treatments to safeguard pipeline integrity and ensure maximum throughput. Our specialized portfolio includes corrosion inhibition to extend asset lifespans, scale and "black powder" removal to protect downstream equipment, and the dissolution of organic deposits like asphaltenes and paraffins that restrict flow. By proactively resolving these complex restrictions and optimizing flow efficiency, we minimize unscheduled downtime and ensure infrastructure operates at peak performance.
Pipeline Chemical Cleaning
Gas export pipelines require a very high degree of internal cleanliness to ensure that the exported product meets the required quality specifications. In addition to mechanical cleaning, surfactant cleaning and gel-based cleaning techniques are employed to achieve the necessary cleanliness levels. Surfactant and gel cleaning may be performed during both pre-commissioning and operational phases. Typically, pig trains comprising brush pigs and bi-directional batch pigs are launched with slugs of surfactant or gel placed between the pigs. As the pig train is propelled from one end of the pipeline to the other, the chemical slugs solubilize, suspend, and transport accumulated debris, while the pigs provide mechanical scrubbing and displacement.
In general, hydrocarbon-based surfactants are used for pre-commissioning and for cleaning live (in-service) pipelines due to their compatibility with hydrocarbon systems. Water-based gels are commonly applied during pre-commissioning cleaning.
To design an effective cleaning program, SYGMA's engineering team evaluates multiple factors, including the type and quantity of potential debris, the debris-carrying capacity and rheological properties of the proposed gel, as well as the pipeline's diameter, length, profile, and operational parameters. This analysis ensures that the cleaning methodology is optimized for the specific pipeline and service conditions.
Corrosion Inhibition
Pipeline internal corrosion is primarily driven by corrosive constituents present in the transported media, including water, hydrogen sulfide (H₂S), carbon dioxide (CO₂), and dissolved salts. Effective corrosion mitigation strategies include cathodic protection, protective coatings, controlled chemical inhibition, and periodic batch inhibition pigging.
SYGMA provides periodic batch corrosion inhibition pigging using chemical inhibitors. These inhibitors can be dosed either directly into the product stream or blended with a carrier fluid such as diesel. The batch inhibition pig train comprises specially engineered batch pigs and applicator pigs, designed to deposit a uniform inhibitor film on the internal pipe surface. Prior to inhibitor application, the pipeline is typically prepared with a cleaning pig train, incorporating brush pigs and batch pigs, to remove deposits and ensure optimal chemical contact.
The scheduling of batch inhibition pigging campaigns is determined based on the observed corrosion rate, which varies depending on the chemical composition of the transported product and operational conditions.
Scale Removal
Scaling in oil and gas pipelines is predominantly caused by the deposition of mineral salts—such as carbonates, sulphates, oxides, and hydroxides—present in produced water. These inorganic deposits accumulate on the internal pipeline surface, leading to increased hydraulic resistance, reduced throughput, and, in severe cases, complete obstruction of the pipeline.
Scale remediation can be implemented via chemical dissolution, mechanical removal, or an integrated approach combining both techniques. We at SYGMA perform a detailed characterization of scale deposits—including mineralogical composition, crystallinity, hardness, and adhesion properties—alongside an assessment of pipeline parameters and operating conditions. This analysis enables the design and deployment of a site-specific, optimized scale removal strategy.
Asphaltene and Paraffin Removal
Deposition of asphaltenes and paraffins in pipelines arises from complex physicochemical and operational factors, including variations in pressure and temperature, changes in crude oil composition, low flow velocities, and surface irregularities or roughness on the internal pipe wall that promote adhesion and accumulation of heavy hydrocarbon fractions.
Mitigation and remediation strategies include solvent-based dissolution, thermal treatments using hot fluids, and progressive pigging with pigs specifically engineered for wax and asphaltene removal. SYGMA engineers conduct a comprehensive evaluation of the hydrocarbon system, including a detailed analysis of asphaltene and paraffin content, molecular characteristics, pipeline geometry, surface condition, and flow dynamics. Based on these parameters, a customized, site-specific remediation program is developed to maximize removal efficiency, minimize operational disruption, and prevent re-deposition.