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POTENTIAL SEPIOLITE AS A SUBSTITUTE MATERIAL FOR DRILLING FLUID

MAT RAZALI, NUR ZAFIRAH (2011) POTENTIAL SEPIOLITE AS A SUBSTITUTE MATERIAL FOR DRILLING FLUID. Universiti Teknologi Petronas. (Unpublished)

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Abstract

In this study, rheological behavior of Sepiolite as a drilling fluid are investigated and comparison study between rheological properties of Bentonite with Sepiolite has been made to ensure optimum value of Sepiolite rheological properties. In high salt contamination and high temperature well, the utilization of Bentonite mud system lead to undesirable rheological performance. Hence, process of removing drilling cuttings is disturbed; unacceptable fluid losses and optimum equivalent circulation density (ECD) can not be achieved. This research is focus on rheological properties of Sepiolite at vanous temperatures and brine concentrations for instances at 150°F and 250°F of 16 hours hot rolled. Semi saturated and saturated brine of 5 lb and 10 lb potassium chloride are formulated in Sepiolite mud system. Furthermore, contradistinction analysis between Bentonite and Sepiolite are analyzed to confirm the efficacious of Sepiolite performance. In order to design an effective drilling fluid system, fresh water is mixed with potassium chloride to obtain a brine solution. Soda ash which is hardness material is added in the solution and mixed for duration of 1 minute. Next, caustic soda is circulated into the solution for about 5 minute. The function of this chemical is to adjust pH value between 9.0 and 9.5. After that, HYDRO PAC-LV is added and mixed for 5 minutes followed by Bentonite. Last but not least, barite is added for 20 minutes as a weighting agent. In conclusion, Sepiolite mud system performs better than Sabah and India Bentonite. Based on the pattern achieved from laboratory experiment, Sepiolite gives best rheological values followed by Sabah Bentonite and India Bentonite. Nevertheless, Sepiolite mud system exhibits highest fluid loss compare to the other Bentonite. This situation can be treated by using higher performance of fluid loss reducer.

Item Type: Final Year Project
Academic Subject : Academic Department - Petroleum Geosciences - Petrophysics - Petrophysical data acquisition
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Geoscience and Petroleum Engineering
Depositing User: Users 2053 not found.
Date Deposited: 13 Nov 2013 17:19
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/10602

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