To address the challenge of stratigraphic correlation and division in exploration and development caused by the diverse sediment sources, complex internal structure, and rapid lateral changes of gravelly fan deposits in the Guojuzi depression steep slope, a comprehensive technique for sequence-based stratigraphic correlation and division of complex reservoirs has been proposed. This technique includes several aspects such as the methodological basis, correlation method, and modification method. The methodological basis involves multi-well precise calibration of target layers, determination of high-frequency sequence stratigraphy division scheme, and seismic constraints. The correlation method includes several techniques such as stratigraphic correlation under the control of stratigraphic unconformity structure, sedimentary pattern control, facies sequence comparison, marker bed method, and contour stratigraphy correlation. The modification method mainly includes stratigraphic thickness method, fluid property method, and structural method, which are used to correct the results of stratigraphic correlation. Based on this technique, a high-order sequence stratigraphic framework has been established, which involved the precise calibration of target layers using seismic, stratigraphic structure, sedimentary facies, facies sequence, marker beds, and contour constraints, followed by the application of correction methods such as stratigraphic thickness, fluid property, and structural analysis. A total of 26 five-level sequence stratigraphic frameworks have been established through high-frequency sequence correlation.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 3, pp. 149–157 May – June, 2023.
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Zhao, D., Yan, Y. & Wang, Y. Comprehensive Reservoir Comparison Technique for Complex Reservoirs. Chem Technol Fuels Oils 59, 625–637 (2023). https://doi.org/10.1007/s10553-023-01563-z
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DOI: https://doi.org/10.1007/s10553-023-01563-z