The application of slicing technology in the Sebei gas field

In view of the geological characteristics of long section and multiple producing layers of quaternary loose sandstone gas reservoirs in the Sebei gas field,the researches into the two-layer and three-layer slicing string,the technologies of matching testing and gas slicing production allocation optimization have been developed to achieve sand production prevention and production improvement of gas wells in loose sandstone gas reservoirs of this gas field,thus,forming a special highly-efficient gas production technology for the development of the Sebei gas field.The field application of slicing technology in 72 wells,involving technologies of separate production from casing and tubing,concentric integrated three-layer slicing,and eccentric running-pulling three-layer slicing,has decreased the interlayer span to the largest extent under the condition of pressure-control production,which not only favorably makes each gas layer's productivity into full play but also greatly improves single well productivity in the Sebei gas field.