Assessment of Nigerian Calcium Bentonite as Cement Replacement for Shallow depth Oil Well Cementing Operation

Authors

  • A. O. Arinkoola Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso
  • S. O. Alagbe Department of Chemical Engineering, Ladoke Akintola University of Technology
  • K. K. Salam Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso
  • B. M. Ajagbe Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso
  • I. O. Akinwole Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso

Keywords:

Nigerian bentonite, Light weight cement, Optimization, Compressive strength, Local content, Box-Behnken design

Abstract

This study assessed the rheological and mechanical properties of Nigerian Ewu-Obi Calcium Bentonite (ECaB) as cement partial replacement for shallow depth cementing operations using experimental design and response surface methodology. Rheological properties, Thickening Time (TT), and Compressive Strength (CS) were measured using a 12-speed rotational viscometer, High-Pressure High Temperature (HPHT) Consistometer, and Ultrasonic Cement Analyzer, respectively. The effect of the increase in the concentration of bentonite clay as well as its interaction with other cement additives (accelerator and antifoam) on plastic viscosity (PV), yield point (Yp), fluid loss (FL), TT, and CS were investigated. The result shows that the optimum replaceable percentage of ECaB in class G cement, accelerator, and antifoam is 23.5, 7.5, and 0.95 wt %, respectively.  At optimum conditions, the PV (17.5±1.35 cp), FL (20 ml/30 min/100 psi), TT (228±16.4 min), and CS24 (614±0.57 psi) obtained agreed with the API standard and compared favorably with literature.

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Additional Files

Published

2022-09-11

Issue

Vol. 19 No. 3 (2022)

Section

Articles

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