Abstract：The distribution of stratigraphic intercalations is a major controlling factor that accounts for heterogeneity in many thick, oil-prone sedimentary layers. Using as an example the Triassic reservoir of the A I member of Akekule Formation in Block 9 of the Tahe Oilfield, which comprises a thick layer of delta distributary channel sand bodies, and combined with core and well log data, the stratal intercalations can be quantitatively classified into two types of clay and carbonate. On this basis, quantitative criteria for the classification of the two types of intercalations are established. Based on the sedimentary environment of the study area, horizontal well data and correlation of interbedded strata in the local dense drilling zone, the pattern and extent of the intercalations are determined. Marked point process simulation is the preferred method to determine the distribution of intercalations during random simulation, and subsequently the random simulation results are modified by data spread. Consequently the three-dimensional certainty geological model of the intercalations is established by human-computer interaction. Intercalations research results provide a geological basis for petroleum reservoir development planning and management.
2010, Vol. 28 
