SELECTING AN APPROPRIATE CARBON-BASED NANOCOMPOSITE ADDITIVE FOR ENHANCING CEMENT STRENGTH: A COMPARATIVE FOR OIL-WELL CEMENTING JOB

Abstract

The shell and Palm shell have successfully enhanced the strength of the cement. Increasing the concentration of the additive yields to high the compressive-strength and shear-bond-strength value. Comparing each objective of this study is to observe the effectiveness of the nanocomposite additives in enhancing the cement strength in oil well cementing job. A well cementation job is a crucial aspect in oil well productivity and sustainability. An oil well with good quality of cementation can prolong its durability in production stage. Moreover, it will reduce the well repair cost and efficiently decrease the workover-job frequency. Cement slurry should be enriched by additives to improve its properties and escalate the bonding. Through this experimental study, two nanocomposite, nanosilica-coconut shell waste with palm shell and nanosilica-palm shell waste, have been introduced. Either coconut shell and palm shell should be in chracoal form before making the nanocomposite additive. The investigation is focused on the Shear-Bond-Strength and Compressive-Strength parameters, two parameters which reflects the quality of the cement bond. Those parameters are obtained from biaxial loading test. Before conducting the test, various samples of cement with different concentration of the nanocomposite additives should be prepared for mixing, drying and hardening processes. Result from the test have indicated that both of the nanocomposite from the Coconut sample with different additive shows its unique efficacy of the additive. Additive from the palm-shell has positively grown the compressive-strength while the other dominant in shear-bond-strength improvement. Another exciting interest reveals from this study is both coconut shell and palm shell waste, which is an abundant resource in Indonesia, can be developed to produce a product with its higher economic value.