... Abstract Wellbore integrity in a gas hydrate bearing formation during drilling and production is a great challenge in the energy industry since a complex thermal-hydraulic-mechanical interaction with decomposed solid hydrate process is involved. A wellbore temperature increase...

... Abstract In shallow marine sediments, gas accumulations and hydrates are significant geohazards to subsea infrastructure, drilling, and production. Therefore, predicting their occurrence is crucial to ensure offshore drilling safety and submarine infrastructure security. In this study, we...

... temperature and high pressure, and in the presence of free water molecules, gas-hydrate crystals will start to form. These gas hydrate crystals may accumulate and cause partial or complete plugging of the pipeline in the vertical or horizontal sections of the pipe. Methanol was previously found to be the only...

... Abstract Gas hydrates, waxes and asphaltenes represent some of the most significant flow assurance challenges, especially in subsea lines, where treatment options can be limited. Currently, complete avoidance is the primary strategy for hydrate management, while chemical or mechanical flushing...

... Abstract Management of hydrate risk is a challenging problem in gas-condensate production systems. A "no inhibitor, no production" operational strategy is the norm due to the insufficiency of real-time knowledge of process conditions and hydrate kinetics in the field. This implies both lost...

... In the tests without natural surfactants (blanks), crude oils were replaced by the model oil. The hydrate former was a gas mixture of methane (74.7 mol.%) and ethane (25.3 mol.%). Methanol and MEG were used as THIs. Hydrate agglomeration was assessed once the hydrate conversion was completed...

... Where, k r is the reaction rate constant; K is the equilibrium constant and C C H 4 is the methane concentration at the hydrate interface. (6) ρ u = ∑ i f i e i The viscosity in the lattice unit is controlled by the relaxation time: (7...

... of the supplied gas at 3400psi with the required pressure in the well which is below 1500psi. Several wells which have low liquid rate flowing colder with the CTGL due to the Joule Thompson-effect elevated the risk of hydrate formation. Monitoring of Wellhead Temperature (WHT) alone can be a challenge since WHT...

..., it was speculated that the formed hydrate flow restriction is likely located in the tubing annulus between the CTGL and production tubing, as illustrates by Figure 2 . Abstract Hydrate occurrence is synonymous in deep water wells, notably when the well experience significant reduction in fluid temperature...

... gas hydrate formation hydrate formation hydrate inhibition flow assurance flow loop kinetic hydrate inhibitor pressure reading inhibition efficiency inhibitor hydrate uninhibited experiment concentration weight percentage hydrate inhibitor time plot gas hydrate pressure decrease...

... Abstract The oil and gas production in deeper water scenarios (e.g. pre-salt) has been increasing due to the growth in industrial production. The exploration fields under more severe conditions is accompanied by concerns about solid precipitation/deposition and hydrate formation. Transient...

... flow assurance gas field wellhead platform hydrate inhibitor methanol pipeline shutdown trunkline technology conference hydrate formation startup prevent hydrate formation hydrate management strategy valve injection platform hydrate free water operation upstream oil & gas...

... Abstract Hydrates are crystalline water compounds that may form in deepsea pipelines and have the ability to quickly and efficiently plug flow. Given this issue, gas hydrate formation tests have been conducted and reported in a number of published articles. However, most published data has...

... Abstract The formation of gas hydrates is considered a major flow assurance issue resulting from high pressure and low temperature conditions during petroleum production in deep water developments ( Sloan and Koh 2007 ). Gas hydrates are solid crystalline compounds, which can be formed when...

... Abstract In subsea production operations, wellhead jumpers are one of the subsea facilities more liable to the formation of hydrate blockages during restart operations. To manage hydrate formation and optimize the amount of thermodynamic hydrate inhibitors (e.g. mono-ethylene glycol; MEG...

... Abstract Gas hydrate formation is considered one of the major problems facing the oil and gas industry as it poses a significant threat to the production, transportation and processing of natural gas. These solid structures can nucleate and agglomerate gradually so that a large cluster...

... Abstract Two major concerns in offshore production are Methane Hydrates and Paraffin Plugs. They may stop wells for months, causing high financial losses. Sometimes, depressurization techniques allow hydrate removal. Another strategy is using coiled tubing or a similar unit to perform local...

..., Alaska North Slope: Design, operations, and implications for CO 2 -CH 4 exchange in gas hydrate reservoirs . Energy & Fuels , 31 ( 1 ), 140 – 153 . Castaldi , MJ , Zhou , Y , Yegulalp , TM . Down-hole combustion method for gas production from methane hydrates . Journal...

... Abstract Data acquired from major gas hydrate field programs over the past 20 years has led to much better understanding of the distribution of gas hydrate on the continental margins and how to detect them. Gas hydrate systems are extensions of the conventional hydrocarbon system but are much...

.... L. , May , E. F. and Aman , Z. M. ( 2018 ). Simulating Hydrate Growth and Transport Behavior in Gas-Dominant Flow . Energy & Fuels 32 ( 2 ): 1012 – 1023 . Di Lorenzo , M. , Aman , Z. M. , Kozielski , K. , Norris , B. W. , Johns , M. L. and May , E. F...