TITLE:
Experimental Study of Engineered Cement Plug to Effectively Cure Losses While Drilling in Iranian Oil/Gas Well
AUTHORS:
Majid Sajjadian, Ehsan Esmaeilpour Motlagh, Ali Akbar Daya
KEYWORDS:
Drilling, Lost Circulation, Cement Plug, Compressive Strength
JOURNAL NAME:
International Journal of Geosciences,
Vol.7 No.2,
February
3,
2016
ABSTRACT: Mud losses are one of the
most severe problems encountered in drilling. This is commonly known as lost
circulation. It can occur in naturally fractured formations and also can be
induced in formations through drilling. Mud losses while drilling leading to
cost overruns and HSE concerns, primary cement job failure due to not getting
the cement up to the desired height resulting in subsequent sustained casing
pressure and corrosion, not able to perform work over activity on certain wells
due to losses. The objective of this paper is to explain extreme lost
circulation problem and introduce cement plug formulation to cure or mitigate
this problem. In addition, the cement plug has certain compressive strength
that this is proper for use to control lost circulation in field. And finally,
the application of a cement plug is described in one well of the Gas Field
(National Iranian Oil Company).