Utilizing A Dual Use Local Materials Instead of Imported Foreign Materials for Drilling Mud Conditioning

Abstract

The most important constituents of drilling operation success is keeping the drilling
fluid rheological properties within a certain limit to maintain continuity of their
functions in a good manner. To achieve that, the drilling mud system needs continuous
and direct supervision such as measuring its rheological properties and treating any
deviation in their values. Viscosity is the most important property in hydraulic program
success due to its direct relation with a bottom hole cleaning during well drilling, thus
related with the drilling rate, so this property should be kept essentially to ensure
bottom hole cleaning and high drilling rate at the same time.
Some chemicals should be added to the mud system to keep both viscosity and other
properties within certain standards and the required limit ,the high cost of such
chemicals increase both the metric cost and the final cost of such wells.
The aim of this research is to test the physical and chemical properties of a local
material, as a thinner and a filtration rate reducer, which tends to decrease the
rheological properties of drilling mud. Twenty six samples of different types of drilling
mud are tested with both the local and imported foreign materials.
The results for both additive materials are compared and it is found that the local
thinner has the same trend as the foreign material to a certain extent. Also, in this work,
the ideal rheological model is detected among six rheological models by preparing an
excel system program to determine the Average Absolute Percentage Error (AAPE).
This program compares the calculated shear stress values and the measured values
obtained from high pressure high temperature viscometer.
The selected models are Bingham plastic model, Power law model, Modified power
law model, Robertson stiff model, and Modified Robertson stiff model and Casson
model.

The most important constituents of drilling operation success is keeping the drilling
fluid rheological properties within a certain limit to maintain continuity of their
functions in a good manner. To achieve that, the drilling mud system needs continuous
and direct supervision such as measuring its rheological properties and treating any
deviation in their values. Viscosity is the most important property in hydraulic program
success due to its direct relation with a bottom hole cleaning during well drilling, thus
related with the drilling rate, so this property should be kept essentially to ensure
bottom hole cleaning and high drilling rate at the same time.
Some chemicals should be added to the mud system to keep both viscosity and other
properties within certain standards and the required limit ,the high cost of such
chemicals increase both the metric cost and the final cost of such wells.
The aim of this research is to test the physical and chemical properties of a local
material, as a thinner and a filtration rate reducer, which tends to decrease the
rheological properties of drilling mud. Twenty six samples of different types of drilling
mud are tested with both the local and imported foreign materials.
The results for both additive materials are compared and it is found that the local
thinner has the same trend as the foreign material to a certain extent. Also, in this work,
the ideal rheological model is detected among six rheological models by preparing an
excel system program to determine the Average Absolute Percentage Error (AAPE).
This program compares the calculated shear stress values and the measured values
obtained from high pressure high temperature viscometer.
The selected models are Bingham plastic model, Power law model, Modified power
law model, Robertson stiff model, and Modified Robertson stiff model and Casson
model.