Safety Engineering Controls of Lost Circulation during Cementing in Onshore Oil Construction Projects

Abstract The global imbalance between supply and demand for oil and gas is growing .This trend was the turn behind studies from numerous oil organizations related to cementing. One of the important functions of cement sheaths is to provide hydraulic zonal isolation between differe nt reservoirs in the well bore. Lost circulation or lost returns is known as the total or partial loss of drilling fluid or cement while drilling. It can be an expensive, time consuming or disastrous process as a blow out and loss life. The significant and continuing losses of mud and /or c ement slurry to a formation during drilling operations affects the oil industry. These problems have negative impact on well economics, well integrity and well life cycle. It has been globally es timated that these problems cause financial loss of billions dollars per year in addition to extensive depletion of rig resources. This paper presents an analysis review for advanced safety engineering controls and materials that are used during cementing in onshore oil construction projects.