The shale gas reservoirs in Pengshui Block belong to the normal pressure system

where the spontaneous production fails after hydraulic fracturing. This is due to the relative low energy and productivity of the reservoirs

hence it is necessary to deploy the artificial lift for the production wells to drainage the water throughout the whole production stage. As the drainage methods are hardly suitable for the various flowback volume in different mining stages

the water drainage efficiency is low. In order to determine the efficient drainage strategies for Pengshui Block

several drainage processes

including electric potential pump+gas lift

concentric tube（small diameter tube） drainage

self-sufficient gas lift and transmission gas lift

are comprehensively evaluated and optimized at the point of economic and technical stage according to the drainage characteristics of the block. The drainage efficiency of gas lift forms a set of drainage technology suitable for shale gas with normal pressure in Pengshui Block. The flowback efficiency of gas lift is up to 72 % in field application. It provides a significant guideline for improving the development of shale gas reservoir in Pengshui.