Considering the importance of the Palmyrian folding zone as one of the promising zones, and the scientific and practical importance of the isolation of the matrix formation in any sedimentary basin or in any part of it, and that the sedimentary rocks, which have sufficient quantity and quality of organic materials cannot become matrixes until they undergo convnient conditions of temperature, pressure and geological time, the aim of this work is to study the effect of these factors on the sedimentary rocks of the investigated ones and to isolate the formations, which may be matrixes. According to the results of this study,the formations which may play the main role as matrix are these which have Middle Triassic age or Paleozoicin the northern Palmyrian subzone, and older than Permian age in the southern Palmyrian subzone .