ME Consultancy Services Manfred Eigner ME Consultancy Services Drilling Fluids 5/15/2019

Drilling Fluids Technology Course Objectives Water & Oil based Drilling Fluids Formation damage Deep Water considerations HP & HT systems Mud program 5/15/2019

Drilling Fluids Technology Course Objectives At the end of this course,YOU will be able to: Define drilling fluids applications Understand the formation damage Define different mud systems Understand deep water considerations with drilling fluids Manage a drilling fluid program. 5/15/2019

Water & Oil based Drilling Fluids Section 1 Water & Oil based Drilling Fluids 5/15/2019

Functions & Properties Introduction Drilling fluid is the lifeblood of drilling operations and defined as : Circulating fluid Drilling fluid Drilling fluid technology is dominated by three factors : Performance Economics Environmental concerns 5/15/2019

Functions & Properties Drilling Fluid Technology The principal task of the drilling fluid is To contribute to the success of the well construction The drilling fluid will emphasize on : Reservoir evaluation Well Productivity Hydrocarbon and Gas Recovery 5/15/2019

Question-1 List the Functions of a Drilling Fluid Which ones are important for Well Control? 5/15/2019

Functions & Properties Basic functions All basics drilling fluids functions can be split into 3 main area’s Control subsurface Pressures Avoid damage to productive zones Promote Hole cleaning Sometimes priorities may change depending on the goals and conditions of the drilling operations Mud lubricity, low toxicity will be adapted to drilling operations 5/15/2019

Properties Rheology Force causing the shearing Viscosity Shear Stress : Unit : Lb / 100 ft 2 Force causing the shearing Surface of the platelet Shear rate : Unit : 1 / sec ( reciprocal second) Difference of velocity between 2 platelets Distance between 2 platelets 5/15/2019