Drilling completion technology for the first branch horizontal well in Sulige Gas Field

Sulige gas field is a typical low permeability, low production low pressure gas field, with relatively poor formation property, and low efficiency of exploration development for conventional horizontal wells, and low-to-moderate production wells take absolutely majority proportion. Considering the formation characteristics of developed multi pay zone, the drilling completion technology researches over branch horizontal wells and filed applications are conducted, to further promote the individual production, to increase exploration efficiency, and to reduce integrative exploration cost. In the paper, from the viewpoint of operation difficulties, wellbore structure, sidetracking skills, completion method, etc., some key drilling completion technologies and applications are introduced on Well T7-14-18H, which is the first double-branch horizontal well in Sulige Gas Field. It is achieved that completion with openhole horizontal section + sectional fracturing stimulation techniques successfully. A set of branch horizontal drilling completion technology is preliminarily formed to fulfill the exploration requirement of Sulige Gas Field, which provide a new technology direction and measure to explore and develop low permeability oil gas fields.