Research And Application Of Fracturing Technology For Compact Sandstone Reservoirs In Changling Gas Field

Deep reservoirs in Changling of Jilin Oilfield are compact sandstone gas reservoirs with low porosity, low permeability and high reservoir temperature, and the natural productivities of most gas wells can't meet industrial requirements. Fracturing is the main measure of increasing reserve and production for gas reservoirs of this type. However, due to the characteristics of high temperature, high pressure, high fracturing pressure, huge damage to formations of the fracturing fluid, corollary equipments hardly meeting the construction requirements and so on in Changling deep gas reservoirs, higher requirements are come up with for fracturing materials, fracturing equipments and fracturing technology.Aiming at the problems met during the fracturing of compact sandstone gas reservoirs in Changling Gas Field, this paper analyzed the requirements of reservoir characteristics to fracturing constructions and the difficulties of fracturing on the basis of deep research on the geologic characteristics of Denglouku Group gas reservoirs; combining the requirements of fracturing technology for compact sandstone reservoirs, such systematic researches as the optimization of fracturing fluid system, the selection of proppants, the optimization of construction parameters and so on are developed; what's more, through the field applications and the researches on reservoir stimulation technology, advanced, practical and matching reservoir stimulation technologies for deep compact sandstone gas reservoirs with high temperature and high pressure are formed.Through field applications, the success of fracturing construction was achieved, and the problems met during the fracturing of Changling Denglouku Group compact sandstone gas reservoirs were solved to some degree and a scientific fracturing technology model was provided for the deep compact sandstone gas reservoirs in Jilin Oilfield.