Application of Fan Delta microfacies mode to utilization of reservoir potential

The Liaohe Cenozoic valley-type fault basin has many types of fan delta with oil reservoirs.Its developing scale is different from less than one square kilometers to dozens of square kilometers.Practice has proved that the residual oil distribution has close intrinsic relationship with the reservoir microfacies mode.The establishment of sedimentary microfacies mode is required for analysing the seismic facies, the characteritics of seismic attributes in potential blocks, the geological background , the background of sedimentary environment, the combination character of rock phase, and its relationship of the changing rules with electrofacies types to establish its sedimentary microfacies, mode and distinguish the type of the microfacies, as well as the microfacies characters, and distribution scale.Using reservoir thickness data from the relative done-drilling, with the limit of the phase band map, it is needed to edit the distribution map of the reservoir to show the distribution character of the reservoir with the potential ,and offer geophysical evidence for deployment of the well-location.From years'practice, the theory of sedimentary microfacies mode obtains better effect in expanding old oilfield potential and deployment of the new wells. It also becomes an efficient practical technology in exploiting oilfields.