Aerated Drilling Optimization in Geothermal Well Drilling in Field “X” Cluster “Y”

Abstract

<em>Aiming for productive fault in Suban Agung Rim, Field X Cluster Y Bengkulu Province, Indonesia, PT Pertamina Geothermal Energy (PGE) drilled some wells to discover the potential awaited. However there are challenge awaits each meter ahead especially in reservoir sections where loss circulation is expected. Knowing the risk, PGE decided to drill the well utilizing aerated drilling. The method has known for decades to be the most effective approach in dealing loss circulation. The method applies certain value of compressed air to be injected in fluid stream, so bubbling process can be achieved in order to reduce the mud weight. The method has benefit to maintain ROP and minimize the risk for pipe get stuck due to poor hole cleaning in fractured formation. There are three wells drilled in Field X Cluster Y which has the same problem in 9-7/8” section; all experienced stuck pipe while drilling. During the process aerated drilling was utilized, however it was not sufficient. This paper will discuss and explain on how the occurrence happened and what to do next in similar condition to avoid the problems.</em>

Application of Artificial Neural Network to Estimate Rate of Penetration for Geothermal Well Drilling in South Sumatera

“…Aerated drilling fluid provides better performance in avoiding lost circulation problems, increasing penetration rates, and avoiding intrusion of drilling fluid into the productive zone. Lastly, proper selection of equipment, mud, and drilling operations will increase ROP and reduce drilling costs [11][12][13][14][15].…”

Cutting Evaluation of HPWBM Drilling Mud Using CCI, CTR, and CCA Method at 17 ½ inch Hole in Directional Well G, Field S.

“…This drilling fluid is divided into two parts, namely mud filtrate and mud cake, the difference is that mud filtrate is the meaning of fluid mud (fluid phase in drilling mud) while mud is the particles in the drilling fluid itself such as barite, bentonite, calcium carbonate and others [2,3]. The main function of this drilling mud is to clean the drill cuttings (hole cleaning) left at the bottom of the borehole so that it rises to the surface, and prevent fluid loss and pressure loss so that the formation pressure and drilling fluid remain stable [4,5]. Therefore, several parameters must be considered from the drilling mud including; density which eISSN: 2614-0268 67 pISSN: 2615-3653 affects the ROP (Rate of Penetration), Rheology (viscosity, yield point, and also plastic viscosity) which affects the speed of removal of drill cuttings, fluid flow rate (flowrate) which affects the direction of flow in the annulus of the borehole [6][7][8][9].…”