METHOD OF WELL TESTING AND CONTROL IN SWABBING PROCESS Russian patent published in 2001 - IPC

FIELD: oil production from wells. SUBSTANCE: installed in tubing at definite depth (700-1200 m) is funnel or spider. Lowered onto the latter before swabbing on logging cable is autonomous geophysical instrument recording pressure, temperature, electrical resistance and other parameters during the entire process of swabbing. Then logging cable is withdrawn and slip swab with weights is connected to logging cable and run to depth of 250-350 m. Then swab is lifted to the surface and fluid is withdrawn. Swabbing process is repeated until differential pressure on formation is reduced by 40-60%. Swab is removed from tubing and disconnected from logging cable. Connected to logging cable are catching devices and run into tubing for retrieval of autonomous instrument from well. Hydrodynamic parameters of formation are determined on basis of instrument readings. EFFECT: higher accuracy of determination of hydrodynamic characteristics of formation. 3 dwg