The sandstone of the Taiyuan Formation in the Mizhi Gasfield of Ordos Basin is the main producing layer of tight gas reservoir,but the transverse change of sand body is fast.The results show that paleogeomorphology is a critical factor controlling the deposition of sand bodies,which determines the development location and distribution scale of sand bodies.Based on 3D seismic data,combined with drilling data,using the method of combining the impression method with sedimentology comprehensive analysis,3D seismic stratum horizontal slice and multi-attribute fusion technology are used to obtain the sedimentary thickness to restore the paleogeomorphology of Permian Taiyuan Formation in Mizhi Gasfield during the sedimentary period,and analyze the control effect of paleogeomorphology on the sand body and hydrocarbon of the front edge of the delta.Then the distribution of favorable sand zones in the Taiyuan Formation is predicted using seismic attributes and neural network technology.The coincidence rate of the new well drilling into the sandstone of the Taiyuan Formation is 90%,the research results further confirm the reliability of the reservoir prediction technology based on paleogeomorphology,which has important guiding significance for the beneficial development of Mizhi Gasfield.
3D seismic stratigraphymulti-attribute fusionneural networkMizhi Gasfield
NETL
NSTL
维普
万方数据
