A method is presented for evaluating oil- and gas-saturated beds in deep boreholes with high temperatures and pressures through the use of different time measurements from a pulsed neutron-neutron logging (PNNL) tool. Data processing and interpretation of PNNL measurements was performed with a program "The Processing of Repeated RK Measurements" developed for that purpose. An example of the application in a thinly laminated shaly-sand well in the Ukraine is presented.