Effects of Chrome Lignosulfonate Concentration and Temperature on Compressive Strength of Cement Class G Used in Oil Well Cementing

Abstract

The primary function of Retarders in cement slurry design is to increase the thickening time to allow time
for placement of the liquid slurry, The current study to observe the effects of temperature and different
concentrations of the substance chrome lignosulfonate used as retarder (one on the additives)to cement class
G used in cementing operation wells in oil fields southern Iraq on the compressive strength of the cement
.The compressive strength of the samples concrete was measured by UCA equipment with different
temperature depending on the depth and internal conditions of the well ( 40C

º
,60C
), and
pressuring affixed amount of 3000 psi .The experiments showed that the highest compressive strength was
1308 psi ,3130psi,3200psi of cement slurry where the concentration of chrome lignosulfonate 0.1% at
temperature 40 C
º
,60C
º
,80C
º
respectively after a period of curing time24 hours ,while the less compressive
strength within the study was 326 psi , 412 psi , 477 psi of cement slurry where concentration of chrome
lignosulfonate 0.5% after curing time 24 hours. The concrete increased as the temperature during the curing
time increased within the range studied and decreasing compressive strength with addition a higher level of
chrome lignosulfonate.

º
and 80C
º