Water pressure regime

WATER PRESSURE REGIME of the natural gas fields (EN: water regime, hydrolycity; DE: Wassertrieb; FR: regime de pression d'eau, regime de charge d'eau, regime de charge hydraulique; ES: regimen de carga de agua; RU: водонапорный режим) is the regime, in case of which the influx of of the useful minerals into the bottomholes of the extractive boreholes is caused by the energy of the compressed gas, and by the pressure of the contour or sole water, which is advancing into the gas reservoir. The water pressure regime is characteristic for the majority of the gas fields. The water pressure regime is accompanied with the inflow of the layer water into the gas reservoir, with the jamming of the gas (as the consequence of the incomplete displacement of this gas from the porous medium, and also as the consequence of the selective advancement of the water through the well drained and most permeable interlayers). The slowdown of the tempo of the decreasing of the layer pressure (which slowdown is associated with the water pressure regime) increases the duration of the period of the operation without the compressor, increases the effectiveness of the work of the installations for the low-temperature separation, and so on. The disadvantage of the water pressure regime is the water flooding of the operating boreholes, and, as the consequence of this fact, the necessity for the increasing of the quantity of these boreholes; the decreasing of the coefficient of the gas yield from the layer (0.79 for the terrigenous collectors; 0.7 for the carbonate collectors; these data are weighted on average throughout the reserves). In association with these facts, in case of the water pressure regime, the special attention is paid to the monitoring and regulation of the advancement of the layer waters into the gas reservoirs. This regulation is performed using the placement of the boreholes on the territory of the gas field according to the special scheme, using the differentiated extraction of the gas from the different parts of the gas field, and so on.