Completed well production string optimum design and application of Sichuan high pressure gas well

High temperature, high pressure and acidicmedium commonly existed in Sichuan deep gas reservoir.The complex geology condition bring many difficulties tocompleted well design, bearing pressure and force and deformation. In the article, completed well production stringdesign aiming at different operating condition has been discussed. In view of different reservoir characteristics of western Sichuan Xujiahe group, north-eastern SichuanJialingjiang group and Feixianguan group, we carried on optimization of down hole tools as the packer, the circulatingSSD, telescopic nipple.Through the production string intensity examination,we determined the western Sichuan highyield well completed well production string structure,proposed new production string design for north eastern Sichuan, which take T1f3 as the target layer, transfer the exploration to the development.