台内薄层礁滩型碳酸盐岩储层定量描述及控制因素——以珠江口盆地A地区为例

doi:10.11743/ogg20140317

摘要/Abstract

摘要：

礁滩型碳酸盐岩储层是南海周缘含油气盆地重要的油气聚集的储层之一。珠江口盆地A地区受地震资料品质低和有效储层刻画手段弱的限制，准确表征该区礁、滩相储层的分布特征研究一直较为薄弱。本次研究基于拓频处理后的高分辨率三维地震资料，采用稀疏脉冲反演、物性反演和三维可视化组合等技术，有效预测并刻画了该区礁滩型储层的空间分布，并结合钻井资料揭示了油水界面关系，对礁、滩体油藏的储量进行了准确计算。目前基于本次研究获得的有效储层定量描述结果部署的评价井获得了工业油流，并且储层预测结果与钻井吻合较好，证实了本次研究采用的技术方法对薄层礁滩型储层预测的实用性和有效性。同时，论文还分析了沉积相带、四级海平面下降引起的淡水淋滤溶蚀作用与礁滩型储层发育具有密切的相关，而风向是影响生物礁相储层平面非均质性的另一主要控制因素。

关键词: 礁、滩体, 薄储层, 储层预测, 珠江口盆地

Abstract:

Reef-bank carbonate reservoirs is one of the important reservoir types in the petroliferous basins around South China Sea.Proved hydrocarbon reservoirs in A region of the Pearl River Mouth Basin are of reef-bank carbonate type.For a long time,the restriction of the low-resolution of seismic data and poor description of the effective reservoirs have seriously influenced the understanding of the distribution of the reef-bank reservoirs.The integration of various techniques such as frequency-expanding processing,sparse-spike inversion,physical property inversion and the 3D visualization made us successfully reveal the spatial distribution of the reef-bank reservoirs,delineate oil-water contact in combination with drilling data,and calculate the recoverable reserves of the reef-bank reservoirs.The appraisal wells emplaced based on the quantitative description results of the effective reservoirs flowed commercial oil and the drilling results coincide well with the reservoir description,confirming the practicability and effectiveness of the methods.Meanwhile,sedimentary faices belt and fresh water leaching dissolution caused by drops of 4^th-order sea level are also closed related with the development of reef-bank reservoirs.In addition,the direction of wind is another major controlling factor on the heterogeneity of reef-bank reservoirs.

Key words: reef-bank, thin reservoir, reservoir prediction, Pearl River Mouth Basin

中图分类号:

TE122.2

张向涛,汪旭东,张素芳,等. 台内薄层礁滩型碳酸盐岩储层定量描述及控制因素——以珠江口盆地A地区为例[J]. 石油与天然气地质, 2014, 35(3): 417-424. doi: 10.11743/ogg20140317 Zhang Xiangtao,Wang Xudong,Zhang Sufang,et al. Quantitative description of intra-platform thin carbonate reservoirs of reef-bank facies and their controlling factors：a case from the A Region of Pearl River Mouth Basin[J]. Oil & Gas Geology, 2014, 35(3): 417-424. doi: 10.11743/ogg20140317

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