PRODUCTS TECHNICAL DATA
PRODUCT NAME :Loss circulation Material,ME-CROSS
ME-CROSS Loss circulation Material has crosslinking that produces a rigid, robust gel structure ideal for shut off treatments into fractures, regular and high permeability formations. This temperature-activated high molecular weight polymer provides a rubber-like gel to seal problem areas. The low viscosity prior to cross linking allows shut off in matrix permeability of less than 750 millidarcies. It is a cost-effective and easily deployed, providing a reliable and effective solution for operators.
Effective temperature range from 60°F to 350°F, salt resistant to 5000mg/L.
Function of seepage and Loss circulation in drilling and workover applications:
The polymer and cross-linking agent, a broad range of the LCM is included to slow seepage of the polymer solution into the formation.
Function of water shut off for Profile control:
In the oilfield with high water cut and large pore development, it is used for profile
control to improve water injection effect. The volume of plugging agent is unchanged when encountering oil, and then it expands and softens after absorbing water. Under the action of external force, deformation occurs and migrates to the deep part of the formation, resulting in flow resistance in the high permeability layer or large pore channel, which makes the subsequent injection water diversion, so as to achieve deep profile control and improve the effect of water flooding.
Followed formulation was selected:
Made 10 m3 of 10% concentration plugging fluids for moderate seepage & leakage
10 m3 base fluids +0.5t ME-CROSS +0.5t LCM agent
Made 10-20m3 of 20% concentration plugging fluids for lost circulation
10m3 base fluids + 1.0t ME-CROSS +1.0t LCM agent
Followed Operation have been executed:
Reverse squeezed from the inside of the drill pipe or backward squeezed from the annulus to the leaking zone (without plugging the inner diameter 20 mm above). After pumping the plugging fluids, lifted the drilling tool above the safety interface.
According to the lost circulation rate change and plugging situation, kept static plugging and shut in for 200-300psi and then added heavy pressure.
Finish until the drilling fluids circulation is recovered or the leakage rate is slowed
down.
Comparable competitive products : Baker huges CARBO-SEAL; BARIOD STEEL-SEAL.
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