Braided River Delta Muddy Interbed Characteristics with Sediment-contributing Factors as Control

doi:10.11885/j.issn.16745086.2016.03.30.02

Abstract

Abstract: Due to insufficient core and dynamic data, it is difficult to precisely characterize the distribution patterns of reservoirs and muddy interbeds in offshore oilfields with scarcely scattered well networks. To resolve this issue, we chose the marine sandstone reservoir of the Pearl River Group-X Oilfield located in the Pearl River Mouth Basin as the research subject. We used high-quality seismic and well-logging data combined with research results of numerous studies of similar on-land sedimentary environments to analyze the characteristics of muddy interbeds. The results show that three types of factors contribute to the muddy interbeds of the study area in the braided river delta:small-scale marine flooding, embankment, and progradation; the interbeds can therefore be divided into three grades to meet the production demand. Based on this classification scheme, the spatial distribution characteristics of different grades and contributing factors were determined using the plan-view and cross-section association and seismic attribute data as control for the sedimentary facies distribution. The spatial distribution characteristics of the interbeds influenced by different factors were characterized and predicted based on the combination of deterministic and stochastic models.

Key words: delta, muddy interbed, contributing factor classification, grade classification, grading characterization

CLC Number:

TE132

XU Lei, FAN Hongjun, FAN Tingen, GAO Yunfeng, WANG Hui. Braided River Delta Muddy Interbed Characteristics with Sediment-contributing Factors as Control[J]. 西南石油大学学报(自然科学版), 2017, 39(5): 31-40.

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