PETE 348 Lab No. 3 - THE UNIVERSITY OF LOUISIANA- LAFAYETTE...

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THE UNIVERSITY OF LOUISIANA- LAFAYETTE Department of Petroleum Engineering METHYLENE BLUE TEST FOR DETERMINATION OF PERCENT BENTONITE IN DRILLING MUD Experiment No. 3 PETE 384, Drilling Fluids Laboratory Section 001 Date performed: 2/1/2005 Date submitted: 2/15/2005 Submitted to: Dr. Ali Ghalambor Submitted by: Signature:___________________________ Team Members:
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TABLE OF CONTENTS I. Abstract 3 II. Introduction 4 III. 5 IV. Figures 7 V. Data 9 VI. Discussion 10 VII. Applications 10 VIII. Conclusions 11 IX. Recommendation 11 X. Appendix 11 XI. References 12 2
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I. Abstract The purpose of this experiment was to determine the basic properties of a water- based bentonite drilling fluid by obtaining data through the implementation of certain devices and procedures. The areas of focus of this study were the amount of reactive clays namely Bentonite per unit volume and the Methylate of the total cation exchange capacity (CEC) of any drilled solids in the drilling fluid (this is known to be similar to the results of the MBT, but less than MBT indications). This data was ascertained by the use of the Methylene Blue Test (MBT). The obtained data and observations were recorded for analysis. A brief of the results of this experiment are as follows: a. The amount of methylene blue used in the drilling mud to get to the yield point was 7 ml, and the methylene blue capacity of the mud was 3.5. b. The percentage of low gravity solids in the mud was 17.5%. 3
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II. Introduction “Knowledge of the type of clays in both the fluid and formation will aid in preventing excessive gel strengths, viscosity, density, pipe drag, stuck pipe, chemical costs, and borehole instability. Without the MBT, drilled solids would remain the most misdiagnosed contaminant in a drilling fluid. A complete solids analysis using an MBT, retort, and salt content determination is the best remedy for maintaining optimized drilling fluid control.” ( 1 ) In order to design, control and maintain certain properties of a drilling fluid, the MBT was conducted on a bentonite sample in order to understand its clay chemistry. The following is a discussion on the description, uses, and indications of the MBT. “The methylene blue dye test is especially designed to determine the capacity of a clay to absorb cations from a solution, and thereby predict how the clay will react in its intended use. The clay may be component of a drilling fluid, a binder in foundry sand, or a clay used for some other purpose. The Methylene Blue Test is based on the property of clays known as Base Exchange capacity; that is, clays can exchange some of their ions
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This note was uploaded on 10/27/2009 for the course PETROLEUM 348 taught by Professor Alig during the Spring '05 term at University of Louisiana at Lafayette.

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PETE 348 Lab No. 3 - THE UNIVERSITY OF LOUISIANA- LAFAYETTE...

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