Abstract: A method for measuring chemical species deposition in a well, flow line, or processing equipment includes monitoring a resonator sensor in a well, flow line, or processing equipment having a fluid flowing therethrough, where the resonator sensor can be a torsional resonator or a symmetrical sensor, and the method also includes detecting a change in resonance of the resonator sensor indicating the deposition of a chemical species on the resonator sensor. The resonator sensor can also measure the amount of chemical species deposited. The fluid may be an organic and/or aqueous fluid that comprises petroleum and/or produced water and the deposition chemical species include, but are not necessarily limited to, asphaltenes, wax, scale, gas hydrates, naphthenic acid salts, and combinations thereof.

Abstract: A method for monitoring the quality, stability, and potential deposition of process treatment fluids pumped into subsea umbilical systems includes monitoring a resonator sensor in the subsea umbilical system having a fluid flowing therethrough, where the resonator sensor can be a torsional resonator or a symmetrical sensor, and the method also includes detecting a change in resonance of the resonator sensor indicating the deposition of a chemical species on the resonator sensor or significant change in process treatment fluid physical viscosity and density properties. The resonator sensor can also measure the amount of chemical species deposited. The fluid may be an organic and/or aqueous based fluid. The method includes performing at least one action in response to detecting the change, which action prevents or inhibits blockage of the subsea umbilical system.

Abstract: Reducing the concentration of kinetic hydrate inhibitors in produced water may be accomplished by treating the produced water using a method selected from the group consisting of chemical adsorption, solvent extraction, chemical coagulation, electrochemical coagulation and combinations thereof. Such reductions may in some instances allow for the reuse of produced water for irrigation or recycle in oil and gas production.