Digital rock workflow to calculate wettability distribution in a reservoir rock
نویسندگان
چکیده
Wettability has a strong influence on multi-phase flow behavior through reservoir rock. Reservoir rocks tend to have spatially varying wettability. Prior contact with oil, are almost always naturally water-wet. As oil invades the pore-space over geologic time, initial water-wet state may be altered in certain locations due adhesion of substances within phase grains. Mechanisms wettability alteration depend various properties such as pressure, temperature, mineral chemistry, surface roughness and fluid composition. In this study rock is studied direct simulation using multiphase Lattice Boltzmann method where computational grid constructed from segmented micro-CT images sample. The pore-grain interface defined by triangulated mesh for accurate fluxes near boundary local curvature calculation. A capillary pressure drainage conducted Berea sandstone sample initially filled water. When pore space increased, fraction towards an oil-wet condition, determined novel process. This process calculates at every element rock, obtains assumes disjoining determine water-film breakage location surface. result, created. Using new distribution, continued allow phases redistribute accordingly. iteratively carried out until both saturation distribution converged given applied pressure. Afterwards, ramped up next stage repeated again. It been found that slow dynamic non-wetting can gradually invade finer surrounding grain altered. study, it also produces lower connate water during primary compared results without alteration. resulting used subsequent flooding calculate water-oil relative permeability curves. methodology presented work leveraged better understand predict improved mixed wetting conditions which needed more displacement tests simulations.
منابع مشابه
An Evaluation of Rock Integrity and Fault Reactivation in the Cap Rock and Reservoir Rock Due to Pressure Variations
Cap rocks are dams which can prevent the upward movement of hydrocarbons. They have disparities and weaknesses including discontinuities, crushed areas, and faults. Gas injection is an effective mechanism for oil recovery and pore pressure. With increasing pore pressure, normal stress is reduced, and the integrity of impermeable boundaries (cap rock, fault, etc.) becomes instable. A successful ...
متن کاملA Review of Reservoir Rock Typing Methods in Carbonate Reservoirs: Relation between Geological, Seismic, and Reservoir Rock Types
Carbonate reservoirs rock typing plays a pivotal role in the construction of reservoir static models and volumetric calculations. The procedure for rock type determination starts with the determination of depositional and diagenetic rock types through petrographic studies of the thin sections prepared from core plugs and cuttings. In the second step of rock typing study, electrofacies are deter...
متن کاملWettability of Common Rock-forming Minerals in a Co2-brine System at Reservoir Conditions
Wettability plays a major role in subsurface fluid migration, however little empirical evidence besides qualitative relative permeability data in this context is known about the characteristics of carbon dioxide (CO2). Core analysts use several methods combined for use in the oil industry, including the USBM (U.S. Bureau of Mines) method and Amott test, supported visually by images from an envi...
متن کاملWettability of Steam-water-rock Systems
A method has been developed to infer the wettability of steam-water-rock systems based on the relationship between permeability and capillary pressure by Purcell. The Purcell model was extended to two-phase flow to verify whether the wettability is a function of water saturation. The results calculated using the experimental data showed that the wettability index in drainage was greater than th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: E3S web of conferences
سال: 2023
ISSN: ['2555-0403', '2267-1242']
DOI: https://doi.org/10.1051/e3sconf/202336701005