Abstract: The present invention is a method for re-gassifying Liquefied Natural Gas (LNG) in a subterranean formation/cavity, storing the resulting gaseous hydrocarbon in the same or connected strata, then subsequent conventional production and delivery of the gas to end users. LNG is injected into a permeable subterranean reservoir through surface and wellbore equipment suitable for operations at cryogenic temperatures. The liquid hydrocarbon vaporizes in the permeable rock/cavity near the injection wellbore as it gains thermal energy from the surrounding strata. The resulting gas is held within the reservoir for subsequent production and/or immediately produced by producing wells in the same or contiguous formations. The invention eliminates the need for onshore LNG receiving/storage terminals.

Abstract: A method for treating a gas well to prevent any fresh water, which may have condensed out of the gas stream, from damaging the gas producing formation during the shut-in period. The well is shut-in and then an additive, e.g. a salt, alcohol, etc., is injected into the well to convert any accumulated fresh water into an aqueous solution which will not damage the formation. The additive can be injected in solid form or as a solution.

Abstract: A method and an apparatus for carrying out a downhole shut-in, pressure build-up test of a formation by lowering a string of coiled tubing having a pressure sensor and a packer thereon through the production tubing of the well. The packer is set to isolated the formation and the pressure is then measured by the pressure sensor. If the well is not flowing due to fluid standing in the wellbore, the well is first unloaded by flowing fluid down the coiled tubing to lift the fluid and reestablish flow into the well prior to setting the packer.