桩西油田桩45-1断块沙二段沉积微相研究
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摘要
根据岩心、测井、地震等资料,在单砂层划分对比的基础上,对桩西油田桩45-1断块沙二段沉积砂体进行分析,认为研究区主要是滨浅湖环境的近岸水下扇和砂坝沉积。分析认为,水下扇可划分为扇根、扇中、扇缘三个亚相,其中扇中亚相可细分为辫状水道、扇中前缘、水道间微相;砂坝可细分为坝缘、坝中微相。在此基础上,对沉积微相与含油性关系进行了分析,为剩余油分布研究及开发方案调整提供了较为坚实的基础。
The region(Z45-1 fault-block in Zhangxi oilfield)is mainly nearshore subaqueous fan and sand-bank deposit, according to the datum of core, logging and seismic, and the stratigraphic classification and correlation of the 2 nd member of Shahejie formation. The result is that the central part of the splays can be divided into braided channel microfacies, the front of mid-fan microfacies and intra-channel microfacies. The sand-bank deposit can be divided into the margin of the bar and the center of the bar. On the base, the relationship between the micofacies and the oil is analysed. The conclusion can be used for reservoir analoging and the remaining oil forecasting.
The region(Z45-1 fault-block in Zhangxi oilfield)is mainly nearshore subaqueous fan and sand-bank deposit, according to the datum of core, logging and seismic, and the stratigraphic classification and correlation of the 2 nd member of Shahejie formation. The result is that the central part of the splays can be divided into braided channel microfacies, the front of mid-fan microfacies and intra-channel microfacies. The sand-bank deposit can be divided into the margin of the bar and the center of the bar. On the base, the relationship between the micofacies and the oil is analysed. The conclusion can be used for reservoir analoging and the remaining oil forecasting.
引文
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