A method executed by a computer processor for managing a field of exploration and production of hydrocarbons, comprising: obtaining a well log (232, 310, 330, 510) comprising a sequence of measurements of a wellbore in the field, the measurements in the sequence each representing a characteristic of surrounding rock and corresponding to a depth along the wellbore; generating a probability distribution based on the measurement values in the sequence for each of a sequence of contiguous sections of the well; generating a plurality of change points (233, 323) in the well log (232, 310, 330, 510), each of the plurality of change points (233, 323) corresponding to a depth along the wellbore where the generated probability distribution of measurement values changes between consecutive sections, wherein the depth range of each of the contiguous well log sections is iteratively adjusted to detect the depth where the probability distribution changes and to generate the corresponding change point; obtaining two consecutive change points from the plurality of change points (233, 323); generating an interval that is bounded by the two consecutive change points; repeating the above steps of obtaining two consecutive change points and generating an interval for the generated plurality of change points (233, 323) to obtain a plurality of intervals; generating a statistic (327, 328, 329) for each of the plurality of intervals in the well log (232, 310, 330, 510); categorizing the plurality of intervals based on the generated statistic (327, 328, 329) for each of the plurality of intervals to generate a plurality of categorized intervals; and generating by the computer processor a field operation control signal based on the plurality of categorized intervals. obtaining a well log (232, 310, 330, 510) comprising a sequence of measurements of a wellbore in the field, the measurements in the sequence each representing a characteristic of surrounding rock and corresponding to a depth along the wellbore; generating a probability distribution based on the measurement values in the sequence for each of a sequence of contiguous sections of the well; generating a plurality of change points (233, 323) in the well log (232, 310, 330, 510), each of the plurality of change points (233, 323) corresponding to a depth along the wellbore where the generated probability distribution of measurement values changes between consecutive sections, wherein the depth range of each of the contiguous well log sections is iteratively adjusted to detect the depth where the probability distribution changes and to generate the corresponding change point; obtaining two consecutive change points from the plurality of change points (233, 323); generating an interval that is bounded by the two consecutive change points; repeating the above steps of obtaining two consecutive change points and generating an interval for the generated plurality of change points (233, 323) to obtain a plurality of intervals; generating a statistic (327, 328, 329) for each of the plurality of intervals in the well log (232, 310, 330, 510); categorizing the plurality of intervals based on the generated statistic (327, 328, 329) for each of the plurality of intervals to generate a plurality of categorized intervals; and generating by the computer processor a field operation control signal based on the plurality of categorized intervals.