The Chuandong Shapingchang Gas Field Production And Adaptive Analysis Of Carboniferous Gas Reservoir And Measures,

ShaPingchang Carboniferous gas field is the largest-sized integral gas field, which has been mined for 11 years in Southwest Oil and Gas Field Branch. In recent years, with the natural gas market contradiction of supply and demand is serious outstanding, gas reservoir is forced to exploit beyond its own scale。Studies suggest that:the basic geological feature, such as gas reservoir structure, reservoir, distribution of gas and water etc, is integrated; reserves and production is reliable; development technique is matching; exploit with proper exceed scale is fit for relevant Gas field development technical specification。But gas production is inadaptable that well pressure drop readily with the production scale improving; in some wells, tubing pressure is equal to pressure of output pipe, integrated declining rate reached 20%～40%, pipe string structure is not adapt to carry water from bottom hole; the number of gas wells which produce water increase rapidly in the south,middle and north, water invasion from three blocks is seriously; some technology presents inadaptability, such as strong drainage technology in Tiandong 90, choke in bottom holewell of Tiandong 026-2, product gas from both casing and tubing in Tiandong 80, organic solution plugging technology in Tiandong 31, foam drainage in other wells. For these problems, we provide some treatment: (1) reducing reservoir development scale, if not, it must be adjusted well spacing density properly and drill additional producers;(2) only Tiandong90 is inadequate for drainage, new drainage wells is necessary;(3) edge water tongued advance is caused by partly huge pressure difference in Tiandong81 and 14, it can be exploited well by measures of controlling water;(4) it is necessary to implement the foam drainage technology in Tiandong14,81,87,91 92; (5) it is necessary to replace underground pipe string in Tiandong81,82,14,26,93 (6) apply organic solution plugging in Tiandong 29,91 (7) gas lift drainage in Tiandong 90 is already inadequacy, electric submersible pump can implement (8) it is necessary to optimize the technology of gas water transfering and backfilling. These measures can give the preferable guide for development in ShaPingchang reservoir.