Modeling of Wax and Salt Deposition in the Near-Well Zone of a Low-Temperature Reservoir Under Various Operating Conditions of Wells (Russian)

Gaidukov, L. A.

doi:10.2118/201912-ru

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…In a few studies, only the salinity is regarded as a constant . In the process of actual gas reservoir exploitation, salt deposit is easy to occur in the near-wellbore area, causing the change of formation water salinity. − The salinity is always affected by reservoir temperature and pressure. Through field fluid sampling, the ion concentration in different periods of a well in the Wen 23 gas field is shown in Figure ; it was found that the main component of salt was NaCl.…”

Section: Introductionmentioning

confidence: 99%

Study on the Phase Behavior Simulation Method of High-Salinity Reservoirs

Ren,

Li,

Yuan

et al. 2024

ACS Omega

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The presence of salinity affects the accuracy of existing correlations used in the equation of state. Moreover, the variation of salinity is often ignored in the systematic analysis of the phase diagram, resulting in a large error in the final calculation result. It is obvious that the conventional phase equilibrium calculation is not applicable in a high-salinity reservoir. By introducing the hydrocarbon−brine binary interaction coefficient and α-function, combined with the definition of salinity, and considering the variation of salinity under different pressure and temperature conditions, a more perfect phase equilibrium calculation model was established. The complete phase diagram was drawn, and the calculation results of salinity distribution are obtained. The effect of the mole percentage of water and salt content on the phase behavior was simulated. Finally, the phase distribution simulation is carried out based on the measured data. The phase state and salinity variation law of a high-salinity reservoir are obtained. According to the fluid composition of different periods, the real phase state of the high-salinity reservoir can be monitored in real time. It can provide a theoretical basis for the gas reservoir development and the dynamic evaluation of gas storage injection and production with a hydrocarbon−brine two-phase system.

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