METHOD AND SYSTEM OF COLLECTION, PREPARATION OF LOW-HEAD GAS-CARBON METHANE AND USE OF THERMAL POTENTIAL OF FORMATION FLUID (VERSIONS) Russian patent published in 2011 - IPC E21B43/34 

FIELD: mining.

SUBSTANCE: in compliance with the method preliminary cleaning and drying of gas is performed, gas pressure is increased, final cleaning and drying of gas is performed and gas is supplied to consumer. Thermal potential of formation fluid pumped from the well is increased, and it is used by heat consumer as heat carrier. At least pumping of formation fluid from the well is performed by using electric-utility means and supply network. Some portion of prepared gas is reserved for being used as energy carrier for generation of electric power at collection and preparation point of low-head gas. System includes gas receiving pipeline. Preliminary gas cleaning and drying devices, gas pressure increase devices and final gas cleaning and drying devices are installed in gas receiving pipeline. Electric power generation unit can be used as reserve source of electric power supply and connected via energy carrier supply pipeline to removal pipeline of prepared gas and electrically at least to electric drive of submersible pump. Formation fluid receiving pipeline is connected to the rise assembly of its thermal potential. There is heat exchange device, drainage tank and heat consumer. Peculiar feature of the second version of the system is that final gas cleaning and drying, as well as rise of thermal potential of formation fluid is performed in single block.

EFFECT: reducing energy costs for collection, preparation of low-head gas and its conversion to marketable natural gas owing to beneficial use of kinematic and thermal potential of formation fluid, and providing the possibility of obtaining heat energy owing to increasing thermal potential of formation fluid pumped from the well, and if necessary, bringing of its hydrogen parameter to the values meeting ecological requirements.

39 cl, 3 ex, 10 dwg