Abstract：Coal measure strata have developed in the Carboniferous-Permian in the Daning-Jixian Block located at the eastern margin of the Ordos Basin. These strata are characterized by complex lithology, tight thin reservoirs (generally 2~10m thick,with an average thickness of 3m), and fast lateral variation. Consequently, the sandstone reservoirs exhibit diverse seismic reflection characteristics, leading to difficult quantitative prediction. For this reason, the seismic response characteristics of the reservoirs are analyzed, and facies-controlled reservoir inversion is conducted. Specifically, the two-dimensional seismic forward modeling method is used to identify the seismic response patterns of different sedimentary microfacies. Then, waveform clustering analysis is carried out to define the facies boundaries. Finally, the seismic waveform indication inversion method is employed for "facies-controlled inversion". The sand body boundaries of different microfacies are constrained, thereby achieving the quantitative prediction of the tight thin reservoir in the third submember of the second member of the Permian Shanxi Formation. The comparison with actual seismic data reveals the reliability of the inversion results. The posterior wells verify that the coincidence rate between the inversion results and the drilling data reaches 83%. The proposed method can provide technical support for the prediction of similar tight reservoirs.
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