Schlumberger uses visual techniques to determine the temperature and pressure conditions of hydrate formation in reservoir fluids. The mercury-free Sapphire pressure gauge is used to study hydrate formation at pressures to 21 MPa [3,000 psi], and the visual PVT cell at pressures to 103 MPa [15,000 psi]. Testing entails charging known quantities of hydrocarbon and aqueous fluids to the cell. At constant pressure, the cell cools until a small amount of hydrate crystal forms. Then the hydrate crystal melts during the heating portion of the temperature cycle. Visual observation of the melting hydrate crystals is used to determine the hydrate formation conditions.
Schlumberger technology can measure hydrate formation conditions in fluids containing natural gas, CO2, H2S, gas condensate, or conventional oil in the presence of water, synthetically prepared brines, or formation water or brine. The hydrate formation conditions can be measured in both the single- and two-phase regions. Additional services include
- evaluation of the effectiveness of various hydrate inhibitors (such as methanol, glycol, and electrolyte solutions)
- inhibitor optimization
- inhibitor solubility
- customized research projects related to hydrate formation conditions and hydrate kinetics.
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