Exploration Discoveries of Elusive Reservoirs Using Detailed Paleogeomorphology Reconstructions

doi:10.11885/j.issn.1674-5086.2017.07.21.01

Abstract

Abstract: Using detailed reconstructions of micro-paleogeomorphology in subsidence basins with steep slopes, we investigated the mechanisms controlling sedimentation. Based on the Balanced Cross Section principle, a tectonic-sedimentation reconstruction method is proposed, and a suitable mechanism chosen to reconstruct tectonics and compaction of formations in a three-dimensional Quaternary tectonic model. The mechanism reduces the effects of late tectonic activities on the paleogeomorphology of subsidence basins of border faults during syndeposition. A comparison between results and observations indicates that the tectonic-sedimentation reconstruction method can more accurately depict the micro-paleogeomorphological characteristics of basins during syndeposition than the traditional residual thickness method. Drilling and monitoring data verify that application of the tectonic-sedimentation reconstruction method to reconstruct paleogeomorphology can better predict distributions of sedimentary systems and reservoirs. The predictions are consistent with the actual drilling results. This provides strong evidence for the potential for discovering large oilfields in the Quaternary tectonic region in the Bohai Bay Basin.

Key words: Bohai Bay Basin, subtle reservoirs, paleo-geomorphological reconstructions, tectonic reconstructions, micropaleogeomorphology

CLC Number:

TE121
TE19

LÜ Zhenyu, ZHANG Xintao, BIAN Lien, WANG Jun, LIU Teng. Exploration Discoveries of Elusive Reservoirs Using Detailed Paleogeomorphology Reconstructions[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 12-22.

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