METHOD FOR DETERMINING COMPOUND OF HYDROCARBONS IN RESERVOIR BEDS OF OIL-GAS WELLS Russian patent published in 2012 - IPC G01V5/10 

FIELD: oil and gas industry.

SUBSTANCE: method for determining the compound of hydrocarbons in reservoir beds of oil-gas wells involves determination of porosity factor (K_n) of the investigated bed by using 2TDTL (thermal-decay-time logging), calculation of porosity function F(K_n) - as ratio of intensity of flows of thermal neutrons on small and large probes of 2TDTL method, calculation of chlorine "hard" function P(C1_h) - spectral intensities of GIR3 in the area of more than 2.3 MeV, chlorine "soft" function F(C1_s) - spectral intensities of GIR3 in the area of less than 2.3 MeV; calculation of function F(C1_nnl) by using flow intensities of thermal neutrons on large and small probes of 2TDTL method; build-up on cross-floats P(C1_h) on F(K_n), F(C1_s) on F(K_n), F(C1_nnl) on F(Kn) dependences corresponding to water-saturated beds (WSB), oil-saturated beds (OSB), and gas-saturated beds (GSB); calculation of chlorine mass function - P[M(C1_h)], F[M(C1_s)], F[M(C1_nnl)], which are related to chlorine content in collector, and calculation of oil saturation and gas saturation as per the specified formula.

EFFECT: enlarging the application area and increasing the informativity of determination of complex mixture of hydrocarbons in beds of oil-gas wells.

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