PETE 348 Lab No. 10 - UNIVERSITY OF LOUISIANA-LAFAYETTE...

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UNIVERSITY OF LOUISIANA-LAFAYETTE Department of Petroleum Engineering LOW WATER LOSS DRILLING FLUID Experiment No. 10 PETE 384, Drilling Fluids Laboratory Section 001 Date performed: 3/22/2005 Date submitted: 4/5/2005 Submitted to: Dr. Ali Ghalambor Submitted by: ____________________________ J Team Members: J
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2 TABLE OF CONTENTS I. Abstract 3 II. Introduction 4 III. 5 IV. Discussion 6 V. Conclusions 7 VI. Recommendations 8 VII. Data and Calculations 9 VIII. Appendix 10 IX. References 13
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3 I. Abstract During the process of drilling a well, the open-hole to drilling fluid interaction produces one negative aspect in that the fluid, which is the major component of the mud, can be lost to pore spaces in the drilled strata. The loss of water from the drilling fluid to the formation occurs when these pore spaces in the formation are open and the pressure differential between the drilling fluid and the formation is great enough to force the drilling fluid filtrate into these pore spaces. The cake building process of the open-hole to drilling fluid interaction is one of the key components in determining the ability of the drilling fluid to retain its water. In this experiment the properties of filtrate loss are studied with respect to additives such as salt (NaCl), Carboxymethyl cellulose (CMC), a de-foaming agent for the salt and fresh water mud, and Drispac. Due to the property of water loss, the effects of the addition of CMC and Drispac are studied with respect to their effectiveness for controlling fluid loss. The base mud used in this experiment was mater based bentonite mud. Furthermore, the purpose of this experiment was to ascertain the changes that occur when the drilling fluid is treated with salt, CMC, and Drispac. These studied areas will show how primarily filtrate loss is affected, and secondarily, viscosities, yield values, and 10 second gel strength are affected due to these additives. Through observation, it was concluded that post-treatment with CMC after salt contamination did not control fluid loss as well as pre-treating the mud with Drispac. However, the apparent viscosity results were better in the CMC post-treated salt contaminated mud. See Table 1 . The areas of study of the drilling fluid for this experiment were as follows: a) yield point (lb/100 ft 2 ) b) apparent viscosity (cp) c) 1, 2, 3, 4, 5, 7.5 and the calculated 30 minute filtrate fluid loss (mL or cc) d) 10 sec. gel strength (lb/100 ft 2 )
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4 II. Introduction During the drilling process, it is necessary to be aware of the properties of the drilling
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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. 10 - UNIVERSITY OF LOUISIANA-LAFAYETTE...

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