PETE 348 Lab No. 2 - THE UNIVERSITY OF LOUISIANA- LAFAYETTE...

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THE UNIVERSITY OF LOUISIANA- LAFAYETTE Department of Petroleum Engineering Sand Content, Total Solid and Liquid Content, Hydrogen ion concentration and Resistivity – Filtrate and mud. Experiment No. 2 (2.1-2.5) PETE 384, Drilling Fluids Laboratory Section 001 Date performed: 1/25/2005 Date submitted: 2/1/2005 Submitted to: Dr. Ali Ghalambor Submitted by: Signature:___________________________ Team Members:
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TABLE OF CONTENTS I. Abstract 3 II. Introduction 3 III. 4 IV. Data 14 V. Discussion 16 VI. Conclusions 18 VII. Recommendations 18 VIII. References 19 I. Abstract 2
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The purpose of this experiment was determine the basic properties of a water- based bentonite drilling fluid by obtaining data through implementation of certain devices and the subsequent observation and recording of this data for analysis. The areas of focus of this study involve parameters yielding data such as plastic viscosity and yield value sand content, total solid and liquid content, hydrogen ion (pH) concentration, and resistivity of both filtrate and mud. The filter-cake building properties and spurt loss characteristics were also studied using an API filter press assembly. Results from the data gathering were as follows (Table 1): Table 1: Brief of data obtained from the experiment. Fluid Loss Greatest during the first minute Sand Content < .5 % Solids and Liquid Total Content < .5%, > 99.5% respectively pH 5.5 Resistivity 1.4 Ohms-meter II. Introduction One of the key components present in the successful drilling of oil and gas wells is obtaining accurate drilling fluid measurements such as those described above. Monitoring a drilling fluid throughout the drilling process as well as during the design and building phases is necessary for safety and project completion. During the drilling process it is very important to know the amount of solids contained in the fluid. The fluid solids, namely Bentonite, serve the purpose of filter cake building on the borehole wall. During this process, applied pressures in the fluid exceed the formation pressures which causes the solids to be actively filtered out of the mud during the initial contact (spurt loss) phase as carrying liquids penetrate the formation. During this interaction, the Bentonite solids accumulate on the walls of the borehole and build the mud cake. This cake building will eventually limit fluid loss and contribute to borehole stability. During the drilling process, solids from cuttings are added to the fluid in the desired effect of their removal. These cuttings contribute adverse properties to the drilling fluid and may 3
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inhibit the effectiveness of the drilling mud system. The amount of sand in the fluid must also be studied since sand is a very abrasive material, which can affect tubulars, pumps and filtration equipment. In addition, the properties of the drilling fluid can be adversely affected by cuttings and solids contamination during the drilling process. In order to maintain the desired properties of the fluid, namely fluid weight, viscosity and gel
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PETE 348 Lab No. 2 - THE UNIVERSITY OF LOUISIANA- LAFAYETTE...

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