The gas reservoirs in Sebei gas field have the characteristics of thin layer
development, gaswater interlayer interaction, great pressure difference among different layers and complex interlayer interference, which
results in that the pressure data of each small layer cannot be obtained by pressure test of commingling production, thus seriously influencing
the effect of various stimulation measures in the gas field. In view of the geological characteristics of the gas reservoir, the wells using the
commingling production technology were selected as the research object, and the new JCYII type separate production and testing integrated
intelligent control system was connected to the production pipe string in these wells. This technology can control the downhole tools in real time
on the ground and carry out the acquisition of downhole test data. At the same time, the reservoir physical parameters such as permeability and
skin factor of each small layer can be interpreted quickly. Five test stages were conducted in the application of Well S32. During the test, the
layers of No. 313 and No. 314 were separately opened for production and shut in for pressure buildup. The flow pressure, static pressure, build
up pressure and other information of single layer and multilayers were successfully obtained. The separate layer pressure testing has been
applicated in 13 wells in the Sebei gas field after promoting, the construction success rate was 100%, and the data acquisition success rate was
100%. This method effectively solves the problem of singlelayer testing of gas wells in the Sebei gas field and can provide technical basis for
the adjustment of subsequent development plans.