FRACTURING TECHNOLOGY OF PENGLAIZHEN FORMATION IN MAJING GAS FIELD OF WEST SICHUAN

The Penglaizhen gas reservoir of Majing Gas Field in West Sichuan is typical low permeability tight sand reservoir. Due to complicated reservoir condition, the fracturing result was not obvious, and the success ratio and effectiveness of fracturing measure was lower. Since 2005, with the research and application of low damage fracturing liquid, multiple fracturing, fracturing with fiber support agent and linear fracturing etc. technologies, the residual fluid content of fracturing fluid was reduced to 16%, and the success ratio and effectiveness of measurement were improved to 90% and 86.6% separately. The average increased production of single well is up to 12.62 times, the good increase production result had been achieved in Majing Gas Field with fracturing technology.