塔河南部地区碳酸盐岩油气预测技术研究

doi:10.11743/ogg20060415

摘要/Abstract

摘要：

塔河南部地区奥陶系存在3套碳酸盐岩储层:中下奥陶统鹰山组、中奥陶统一间房组和上奥陶统良里塔格组。其中,中奥陶统一间房组是塔河南部地区主力产油层段,鹰山组试油以出水为主,良里塔格组因储层物性较差,试油井很少。基于小波变换的频谱分析技术主要反映频率域与流体有关的各种频率参数和能量参数,针对研究区储层的沉积特点,分别探索其油气检测技术。由于高频成分被吸收导致高频能量衰减的衰减梯度属性技术能够较好地反映一间房组、鹰山组油气水分布特征;85%能量对应的频率属性参数对于良里塔格组油气预测有较好地显示。其中,衰减梯度属性技术在一间房组经过70多口井的验证(包括油层、油气层、油水同层、含油水层、油气显示、水层和干层等),可有效排除干层,即储层不发育地区,对于区分油气层和水层,预测效果在70%以上。

关键词: 油气检测, 一间房组, 中奥陶统, 碳酸盐岩, 塔里木盆地

Abstract:

Three carbonate reservoir intervals are found in the Ordovician in south Tahe: the Lower-Middle Ordovician Yingshan Formation,the Middle Ordovician Yijianfang Formation,and the Upper Ordovician Lianglitage Formation.The Yijianfang Formation is the main pay zone in the reservoir in south Tahe,and the Yingshan Formation is mainly aqueous layer,while the Lianglitage Formation is seldom tested due to its unfavorable physical properties.The spectral analysis based on wavelet transform mainly reflects various frequency parameters and energy parameters of frequency domain in relation to formation liquid.In view of the depositional characteristics of reservoirs in the study area,different oil and gas prediction technologies are studied.The oil-gas-water distribution characteristics of the Yijianfang and Yingshan formations can be well described by using the attenuation gradient attribute of high frequency absorption-attenuation, while oil & gas distribution of the Lianglitage Formation can be well predicted by using the frequency attribution parameter that relates to 85% of high frequency energy.The attenuation gradient attribute technology is employed to detect oil and gas in over 70 wells.The prediction results show that it can effectively recognize dry layer and differentiate hydrocarbon layers from water layers with coincidence rate as high as 70%.

Key words: oil and gas detection, Yijianfang Formation, Middle Ordovician, carbonate rock, Tarim basin

中图分类号:

TE122.1

李明娟,张永贵,邬兴威,等. 塔河南部地区碳酸盐岩油气预测技术研究[J]. 石油与天然气地质, 2006, 27(4): 536-541. doi: 10.11743/ogg20060415 Li Mingjuan,Zhang Yonggui,Wu Xingwei,et al. A study on oil & gas prediction technology in carbonate rocks in south Tahe[J]. Oil & Gas Geology, 2006, 27(4): 536-541. doi: 10.11743/ogg20060415

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