FIELD: oil and gas production.
SUBSTANCE: invention refers to oil producing industry and is designed for evaluation of permeability of pay reservoirs saturated with fluids. According to the method a logging instrument is assembled in a well; the logging instrument consists of an acoustic emitter, of at least two acoustic detectors (AD), of at least two electric emitters and of at least two electric detectors (ED). Also each AD is located between ED and the electric emitter. To excite a reservoir an acoustic pulse is generated, whereupon amplitude of acoustic response (AAR) is measured by means of AD and amplitude of current strength initiated by acoustic effect is measured with ED. Further, pulse of voltage is generated at the same position of the instrument; and AAR, initiated with applied voltage, is measured with AD. At the same position of the instrument the acoustic excitation of the reservoir is repeated at least once followed with measurements of AAR and current strength amplitude; also voltage pulse is generated followed with measurement of AAR. Notably, acoustic pulse and voltage pulse with increased amplitudes are generated at each repeat. Permeability is calculated for each of sub-layers of the reservoir located opposite AD at a specified position of the instrument in the well. Also, thickness of the sub-layer is equal to distance between adjacent AD. The instrument is moved up or down along the borehole of the well at a distance equal to distance between the adjacent AD; sequence of all above mentioned actions for each sub-layer of the reservoir is repeated. Permeability of the reservoir is evaluated on base of obtained data.
EFFECT: minimisation of inaccuracies during continuous logging.
5 cl, 2 dwg
