Resistivity Of Mud Essay

ABSTRACT

The resistivity is a very important property to consider in a drilling fluid. The measurement of resistivity gives us adequate information to know on the concentration of soluble salts. Resistivity is measured by placing the sample in a resistive container having two electrodes spaced so that electrical current can flow through the sample. The main aim of this experiment is to determine the resistivity of the mud sample, the effect of the additives on the mud and then take the measurement using the Analog Resistivity meter. The results were observed and recorded.

LIST OF TABLES

Table 1.1: showing the result data for the different mud compositions; their corresponding temperatures and resistivity.

Table 1.2: showing the result data from the nomograph of the different mud compositions and their concentration of chloride in ppm & percentages.

LIST OF FIGURES

Figure 1.1: Analog Resistivity Meter

Figure 1.2: Beaker

Figure 1.3: Spatula

Figure 1.4: Mixer

The resistivity of water muds is measured and controlled, whenever desired to permit better evaluation of formation properties from electrical logs. Measurements of the resistivity of water muds, filtrates and filter cakes are routinely applied in electrical logging. Resistivity measurement provides a rapid means of detecting soluble salts in barite and in waters, such as makeup or produced waters. The resistivity meter is a portable measuring device designed to give an accurate measurement of the resistivity of a small sample expressed in ohm-meters. The ohm-meter reading may be converted into parts per million (ppm) using the nomograph provided. Conductivity is the reciprocal of resistivity. The chlorides concentration is what is being used to know the amount of the salt that will give the desired resistivity of the drilling mud, from which the conductivity is