Accurate Description by Well-To-Seismic Integration of Glutenite Fan Sedimentation in the Northern Dongying Sag, Jiyang Sub-basin

doi:10.3969/j.issn.1006-6535.2021.01.003

Abstract

Abstract: Glutenite fan reservoir is one of the important reservoir types for enhancing reserve and productivity in Shengli Oilfield. In view of the problems of strong heterogeneity and low accuracy of reservoir description, on the basis of core observation, logging response analysis and seismic forward modeling, the glutenite fan in Well Y22 in the northern slope of the Dongying Sag was finely divided with well-to-seismic integration into subfacies and microfacies by such methods as fine stage division, synthetic record calibration, and numerical simulation. It is found in the study that the different sedimentary structure of sedimentary subfacies of glutenite fan brought about different reflection characteristics, and the sedimentary subfacies could be easily distinguished by waveform clustering attribute; the middle-fan subfacies of the glutenite fan in the Yanjia Area was mainly developed with two sedimentary microfacies, namely braided channel and water channel, the lithology of the braided channel was mainly composed of thick pebbled sandstone deposit, and the edge of the water channel was composed of interactive deposit of mudstone and pebbled sandstone; the regional lithology could be easily distinguished with AC, R_LLD and CNL logging curves, and accurate description by well-to-seismic integration of sedimentary subfacies and microfacies of the glutenite fan based on logging curves and variogram simulation, under the constraints of sedimentary facies and tectonic stage models. This technology can accurately describe the sedimentary facies zone of the glutenite fan, and provide technical support for the deployment of glutenite fan exploration and later productivity construction.

Key words: glutenite fan, sedimentary subfacies and microfacies, well-to-seismic integration, accurate seismic description, Jiyang Sub-basin

CLC Number:

TE122.2

Liu Jianwei. Accurate Description by Well-To-Seismic Integration of Glutenite Fan Sedimentation in the Northern Dongying Sag, Jiyang Sub-basin[J]. Special Oil & Gas Reservoirs, 2021, 28(1): 18-25.

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