International Journal of Advanced Engineering Research and Science (IJAERS) Peer-Reviewed Journal ISSN: 2349-6495(P) | 2456-1908(O) Vol-8, Issue-6; Jun, 2021 Journal Home Page Available: https://ijaers.com/ Article DOI: https://dx.doi.org/10.22161/ijaers.86.56 www.ijaers.com Page | 491 Effect of Microbes on Drilling Fluid Formulation Nmegbu Chukwuma Godwin Jacob 1 , Oma Frank 2 , Orisa F. Ebube 3 , Oritom Hezekiah- Braye 4 1,2,4 Department of Petroleum Engineering, Rivers State University, Nigeria. 3 Emerald Energy Institute, University of Port Harcourt, Nigeria Received: 19 May 2021; Received in revised form: 09 Jun 2021; Accepted: 19 Jun 2021; Available online: 30 Jun 2021 ©2021 The Author(s). Published by AI Publication. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/). Keywords—Cultures, Density, Drilling mud, Microbes, Rheology. Abstract— Microorganisms square measure thought of to have an effect on the properties of drilling fluids. This work self-addressed the subsequent sections: the character of Micro-organisms, microbic Mechanisms that have an effect on Drilling Fluids, Implications of microbic Contamination and Identification. This work focuses on the likelihood of utilization of microbes as basic material for lubricant. This analysis assess by means that of straightforward however relevant laboratory, the properties of the microbes cultivated from banana skin within the micro-biological laboratory and compared with commonplace drilling fluid. The results were analyzed exploitation applied mathematics and graphical ways. Water based drilling muds were developed with the microbes and characterised to work out the properties like density, rheology and pH within the laboratory and compared with those of the standard laboratory mud. Results showed enhancements in sure properties, but it verified unsuitable in different properties in comparison to straightforward drilling fluid. I. INTRODUCTION The existence of natural water setting ensures, regardless of however harsh, some variety of micro- organism. These micro-organisms exists in many thousands of species and new species are bound to be discovered at the speed of over 1000 each year [1]. Natural populations will range from some hundred organisms per cubic decimetre of fluid to well in far more than a billion per cubic decimetre. Micro-organisms form a formidable force when put together capable of destroying nearly each organic existing. The role of micro-organisms is basically the reduction of complicated matter to a lot of easy kind, bringing back this energy as building blocks of life. Drillinq fluids are perpetually exposed to giant numbers and kinds of micro-organisms although it was often thought that drilling fluids and their additives possessed low susceptability to microorganism attack. However in the wake it became clear by their terribly nature and sophisticated organic structure, it is this evident that they are ideal environments for a range of micro-organisms. Natural gums, carboxymethylcellulose (CMC), lignins, liqnosulphonates, tannins, and many other compounds which are added to muds are all found to be susceptible to biodegradation also synthetic polymers such as polvacrylamides are not immune to attack either [2]. The source water used to prepare the mud, wind blown dust and dirt, rain, human contact, and possibly even some of the materials which are used to prepare the mud are few means by which these micro-organisms could enter the drilling mud. Its degree of existence is then favoured by factors such as: temperature of the re-circulating mud, composition of the water used to make up new mud, chemical nature of the mud system itself, the length of time that is required to drill the hole, and type of micro- organisms which become established and time [3]. The microbes utilize xanthan gum, a common drilling mud additive. Also, drilling fluids are highly alkaline and