METHOD OF DETERMINING PHASE DEBITS IN OIL WELL Russian patent published in 1997 - IPC

FIELD: oil and gas production. SUBSTANCE: invention deals with determining productivity and quantitative evaluation of summary phase debits in oil well under transient operation conditions. Method of determining phase debits in oil well consists in stimulating inflow of formation fluid after preliminarily lowering of level of liquid in well hole and also controlling inflow rate performed by registering a series of barograms in the interval above the head of functioning bed followed by comparing average pressure gradient and pressure change ratio for each pair of barograms. From these data, time dependence of density, volume and weight debits of multiphase mixture entering well are determined. EFFECT: improved reliability of determination. 1 tbl