06-12-2018 дата публикации
Номер: US20180348105A1
Автор:
Ping GUO,
Shuai WU,
Wanbo ZHANG,
Yisheng HU,
Yijian CHEN,
Huimin ZHANG,
Zhouhua WANG,
Jianfen DU,
Huang LIU,
Hongmei REN,
GUO PING,
WU SHUAI,
ZHANG WANBO,
HU YISHENG,
CHEN YIJIAN,
ZHANG HUIMIN,
WANG ZHOUHUA,
DU JIANFEN,
LIU HUANG,
REN HONGMEI,
GUO, Ping,
WU, Shuai,
ZHANG, Wanbo,
HU, Yisheng,
CHEN, Yijian,
ZHANG, Huimin,
WANG, Zhouhua,
DU, Jianfen,
LIU, Huang,
REN, Hongmei
A direct method for manufacturing a large model fractured core and maintaining original oil-water saturation, including the following steps: (1) determining the volume V, porosity φ, permeability K, oil saturation S, water saturation Sand the like of a fractured core to be manufactured; (2) preparing simulated oil, and determining the used oil mass m=V×ρ; (3) under the circumstance of no consideration of oil saturation, acquiring the mass of the used water, cement and quartz sand; (4) while establishing oil saturation, acquiring the mass mof water for manufacturing the core as m=a−V×ρ; (5) mixing oil, water and an emulsifier evenly to prepare an oil-in-water emulsion; (6) adding cement and quartz sand into the emulsion and stirring evenly to obtain cement slurry; (7) when a cement sample is in a semi-solidified state, cutting the cement sample with a steel wire; and (8) solidifying the cement sample to the end. 1. A direct method for manufacturing a large model fractured core and maintaining an original oil-water saturation , comprising the following steps:{'sub': o', 'w', 'o', 'o', 'o', 'w', 'w', 'w, '(1) determining a volume V, a porosity φ, a permeability K, an oil saturation Sand a water saturation Sof a fractured core to be manufactured, and determining an oil volume Vof the fractured core as V=V×φ×S, and a water volume Vof the fractured core as V=V×φ×S;'}{'sub': o', 'w', 'o', 'o', 'o', 'o, '(2) preparing a simulated oil according to an oil-water viscosity ratio of a formation under experimental conditions, and determining an oil density as ρand a water density as ρ, determining an oil mass mfor manufacturing the fractured core as m=V×ρ;'}(3) under a circumstance of no consideration of the oil saturation; acquiring, through experiments, a water-cement ratio m and a cement-quartz sand ratio n based on the porosity φ and the permeability K; and thus acquiring masses of used water, cement and quartz sand are a, b and c respectively, the circumstance of no ...
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