To alleviate excess gas production in the Prudhoe Bay field, a non-rig gas shutoff technique using sodium silicate has beer-developed. An activated sodium silicate mixture is squeezed through coiled tubing into the gas producing intervals where it gels into a gas impermeable barrier. In addition, a temporary bridging agent has been successfully used to isolate oil producing intervals during a squeeze. This technique utilizes coiled tubing and can be accomplished for approximately 25% of the cost of a standard rig workover at Prudhoe Bay.

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