goshtasb cheraghian - Islamic Azad University, Science and Research Branch, Department of Petroleum and Gas Engineering
sajad tardasti - Islamic Azad University, Omidieh Branch, Department of Petroleum Engineering
mahboubeh naderinasab - MashhadUniversity of Medical Sciences,Microbiology Research center,Khorasan razavi,Iran

Using the new science of modern biotechnology applications in addition to the required material parameters are needed to improve energy efficiency and energy conversation increases, In order to study the effect of the microorganisms of excavation fluids, some experiments were designed for the basic drilling mud ,then with some standard attributes, the basic drilling mud was prepared that contains the four mentioned bacteriathese bacteria were added to the fluid separately and were put in 37 centigrade. After a day some tests such as mud filtrate, pH, gel strength and mud cake thickness will be done. The slightly parameters in this experiment is only on the type of the microbe and other variables are fixed. Increase in mud cake, decrease in filtrate in some fluids, the variety of gel strength and the production of the best fluid for the unstable and swell formation against the seepage of the filtration of water base mud are the upshots of this experiment. Taking advantage of these tests can help to conversation energy issues and specifically engineered for modern and fossil fuel extraction will.

Drilling fluid, mud filtrate, mud cake, Biotechnology, gel strength