METHOD FOR DEVELOPMENT OF MULTIPLE-BED GAS DEPOSITS Russian patent published in 1999 - IPC

FIELD: gas production industry. SUBSTANCE: according to method, gas is overflown from lower bed to upper lower-pressure bed under regulation of pressure. Producing wells are drilled into higher-pressure bed. Producing wells are drilled in number needed for ensuring preset recovery of gas from entire deposit. Overflow of gas from higher-pressure bed is initially carried out through one pattern of drilled wells into roof of bed with most lower bed pressure with closed wells at their heads and until levelling of bed and bottom-hole pressure within interval of opening of lower-pressure bed. Upon levelling of pressures, performed is simultaneous combined operation of upper and lower beds by using single lifting string. At flooding of lower bed, flooded wells are brought to operation of upper bed. Application of aforesaid method allows for reducing capital cost for drilling of wells together with increasing gas output. EFFECT: higher efficiency. 4 dwg, 1 tbl