Halliburton’s MOC/One system is a solution for water control and loss circulation problems. The system uses a hydrocarbon-based micro-matrix cement slurry to selectively shutoff water intrusion. The system reacts only to the presence of water and can be deployed using bullheading or coiled tubing. MOC/One system is applicable for temperatures as high as 400° F (204°C). MOC/One slurry can provide excellent casing integrity when it is used to repair leaks. Other applications of MOC/One slurry include: sealing highly permeable zones, stopping unwanted water or gas production coming from channels behind casing, sealing pinhole leaks in the casing, sealing water-bearing formations with fractures, among others.