| 摘要 |
Gas production wells, which no longer produce gas utilizing conventional primary and secondary means of recovery, can be returned to production by treatment comprising addition of an aqueous solution of certain phosphate ester surfactants followed by successive treatment with water. Increased production also can be obtained in low-producing gas wells by similar treatment with certain phosphate ester surfactants. Subsequent to treatment of a producer well, said phosphate ester surfactant aqueous solution is forced into the formation utilizing water and said surfactant and water mixture is allowed to remain in the producing well, for an effective period of time ranging from not less than 24 hours to one month. Thereafter, conventional fluid drive means are then utilized to recover gas from the subterranean gas formation.
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