Fracture Characteristics and Seismic Prediction of Z4 Metamorphic Buried-Hill Reservoir

doi:10.7657/XJPG20240502

Abstract

Abstract:

Seismic prediction of fractures is the foundation of fractured reservoir evaluation. Metamorphic buried-hill reservoirs exhibit diverse fracture types, significant variations in fracture development at different reservoir parts, and difficulties in describing fracture heterogeneity. The Z4 metamorphic buried-hill reservoir was investigated for its fracture characteristics and seismic prediction. The development of fractures in the Z4 reservoir has layering characteristics and can be divided into four sections such as weathered-semi-filled fractures at the top, highly developed net-like fractures in the upper part, moderately developed low-angle fractures in the middle part, and poorly developed high-angle fractures at the bottom. A comprehensive fracture prediction technique was proposed, which integrates multi-scale general spectral decomposition, dip-oriented eigenvalue coherent processing, and iterative ant analysis. The fracture orientations and development revealed by cores were compared with the results of seismic prediction, suggesting a high consistency. It is believed that the multi-approach comprehensive fracture seismic prediction technology proposed in this study has high accuracy.

Key words: Dongying sag, Z4 buried-hill reservoir, metamorphic rock, fracture characteristic, seismic prediction, ant

CLC Number:

TE122

DING Sheng, LIU Jinhua, SHANG Yamin, PENG Pai, FU Jinxiang. Fracture Characteristics and Seismic Prediction of Z4 Metamorphic Buried-Hill Reservoir[J]. Xinjiang Petroleum Geology, 2024, 45(5): 516-521.

Figures/Tables 5

References 19

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地层段	深度/ m	样品数/ 个	总孔隙度/%
地层段	深度/ m	样品数/ 个	最大值	最小值	平均值
1段、2段	1 533—1 605	46	15.5	0.3	4.49
3段	1 605—1 632	26	9.0	0.2	2.97
4段	1 632—1 700	6	11.0	1.6	3.45