heat of dilution
Recently Published Documents


TOTAL DOCUMENTS

70
(FIVE YEARS 0)

H-INDEX

11
(FIVE YEARS 0)

2019 ◽  
Vol 11 (39) ◽  
pp. 4983-4990 ◽  
Author(s):  
Mônica Voss ◽  
Sandra Kunde Schlessner ◽  
Daniele Ferreira ◽  
Alessandra Stangherlin Oliveira ◽  
Mariany Costa Deprá ◽  
...  

Direct determination of ethanol in paper devices based on the temperature change of the mixture with water (heat of dilution).


2012 ◽  
Vol 174-177 ◽  
pp. 496-501
Author(s):  
Ping Quan Wang ◽  
Zai Jun Li ◽  
Xun Yong Nie ◽  
Yang Bai

The special viscoelastic gel has been successfully applied to deal with severe lost circulation problem in more than thirty wells. It was demonstrated that the viscoelastic gel exerted important functions in dealing with the underground blowout-loss circulation coexistence problem in Shuangmiao Well 1, and the high H2S content blowout-loss circulation coexistence problem in Luojia Well 2, and high CO2 content blowout-loss circulation coexistence problem in Xushen-8 well H1. One of the important reasons why the gel was applied to deal with the problems successfully was that the gel has strong anti-dilution ability. The strong anti-dilution ability of the gel is one of the important reasons why to plugging successfully. This paper studied the heat of solution of the polymer ZND and heat of dilution of the gel-ZND based on thermodynamics. The smaller the heat of dilution is, the stronger anti-dilution ability of the gel ZND has. Chose the volume change rate through screening out to characterize the anti-dilution property of the gel and investigated the affecting factors. The experimental results showed that the quantity of screen residue decreased with the increasing of temperature, shear rate and shear time,but increased with increasing of concentration. Studied anti-dilution ability of gel-ZND in the fragmentized zone simulated by a large size plugging device. The displaced volume rates of gel-ZND with concentration above 1.0% displaced by equivalent pore volume water are all smaller than 16%. The displaced volume rate of the gel was less than 2% continuing displaced by the gel-ZND by two times pore volume water when water breakthrough came. It validated that the special gel-ZND had strong anti-dilution ability. The results provide experimental basis and theoretical guidance for resolving the potential safety hazard caused by severe loss circulation or blowout-loss circulation coexistence.


1992 ◽  
Vol 86 (2-3) ◽  
pp. 263-265 ◽  
Author(s):  
D. Moelands ◽  
N.A. Karnik ◽  
R.J. Prankerd ◽  
K.B. Sloan ◽  
H.W. Stone ◽  
...  
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document