The effect of cementing additives on the rheological properties, thickening time, and compressive strength in drilling operation

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DEHVEDAR MOHSEN; Hosseini Mohammad Mahdi

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Journal Paper

Paper Information

Journal: Amirkabir Journal of Civil Engineering Year:2023 | Volume:55 | Issue:6 Page(s): 1219-1236

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Information Journal Paper

Title

The effect of cementing additives on the rheological properties, thickening time, and compressive strength in drilling operation

Author(s)

DEHVEDAR MOHSEN | Hosseini Mohammad Mahdi | Issue Writer Certificate

Keywords

Oil Well cementing

HPHT cement design

Thickening time

Compressive Strength

Abstract

Plastic viscosity (PV), yield point (YP), fluid loss volume, Thickening time, and Compressive Strength of cement are the main parameters that are necessary for a successful operation. In this study, 25 tests were done to design different slurries and find the effect of various additives, including extenders (bentonite and sodium silicate), accelerators (calcium chloride and sodium chloride), retarders (calcium lignosulfonate and CMHEC), and fluid loss controller (FLC). Calcium chloride provides acceptable results up to 6% of the weight of cement. For more than 6%, it provides unpredictable results. The amount of sodium chloride in high concentrations (30%) also acts as a retarder. Calcium lignosulfonate slows down Thickening timeless than CMHEC, while CMHEC can retard the slurry more and increase the closing time. The slurry setting time trend increases in calcium lignosulfonate almost linearly while CMHEC increases nonlinearly. addition of FLC to cement water causes water to be retained in the slurry system and this causes the increase of this additive in the slurry to increase the setting time of cement and reduce its short-term strength (24 hours).

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