METHOD OF SURVEY AND ASSESSMENT OF RESERVES OF OIL DEPOSITS IN TIGHT FISSURED STRINGERS DEVELOPED IN OIL SOURCE STRATA Russian patent published in 2009 - IPC G01V11/00 

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil geology. The essence of the invention is as follows: wells are bored with total recovery of core from target reservoirs, further there are performed seismic surveys, downhole logging, geo-physic surveys, field researches of wells and geo-chemical surveys of core and oil from target sediments. Stringers of collector are individualised on the set of obtained data. Capacity of empty space of each collector stringer is assessed by data set of radioactive and acoustic logging. Total specific capacity of collectors in a target well profile is calculated on preset critical value of yield coefficient. Critical value of total efficient capacity of collectors is calculated; this value allows limiting fields to paying and conditionally paying reserves. Geological reserves of oil accumulated in deposits are assessed by a volume method with division to paying and conditionally paying sections. Spacing of new survey wells is optimised on base of distribution of reserves of various categories along area to achieve maximal growth of paying reserves of oil per well. Optimisation of spacing of producing wells on base of distribution of productivity of collectors and of reserves density is performed so, as to achieve maximum yield in zones with maximal mass and density of reserves.

EFFECT: upgraded accuracy, reduced cost and terms, increased ecologic safety.

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