川西新场气田下沙溪庙组气藏预测评价研究
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摘要
新场下沙溪庙组气藏是川西致密碎屑岩远源气藏中新近发现的又一含气层段。文中通过对该气藏基本地质特征及含气砂体地球物理特征的研究 ,总结出该气藏天然气富集的控制因素主要为储层沉积微相 ,含气砂体表现为“中 -强振幅和低阻抗”的负反射地震响应特征。在对气藏特征认识的基础上 ,作者结合有利储层微相展布及地震响应等特征对气藏进行了预测评价。
The gas pool in the Lower Shaximiao Formation of Xinchang gasfield is another gas-bearing interval discovered recently in the distal gas reservoirs of tight clastic rock in West Sichuan province. By study on the geophysical properties of gas-bearing sandbodies and the basic geological characteristics of the gas pool in this paper, it is summarized that the control factors of natural gas enrichment for this gas pool are mainly reservoir sedimentary microfacies and gas-bearing sand bodies show the negative reflection seismic response features of me-dium-strong amplitude and low impedance. Based on the acknowledge of gas pool characteristics, the gas pool is predicted and evaluated combined with favorable reservoir microfacies distribution, seismic response and other characteristics.
The gas pool in the Lower Shaximiao Formation of Xinchang gasfield is another gas-bearing interval discovered recently in the distal gas reservoirs of tight clastic rock in West Sichuan province. By study on the geophysical properties of gas-bearing sandbodies and the basic geological characteristics of the gas pool in this paper, it is summarized that the control factors of natural gas enrichment for this gas pool are mainly reservoir sedimentary microfacies and gas-bearing sand bodies show the negative reflection seismic response features of me-dium-strong amplitude and low impedance. Based on the acknowledge of gas pool characteristics, the gas pool is predicted and evaluated combined with favorable reservoir microfacies distribution, seismic response and other characteristics.
引文
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[2] 罗执潭,王允诚.油气储集层的孔隙结构.北京:科学出版社,1986.
[3] HillierS .Pore liningchloritesinsiliciclasticreservoirsandstones:electronmicroprobe,SEMandXRDdata,andimplicationsfortheirorigin[J].ClayMinerals,1994,29:665679
[4] PittmanED ,LareseRE .Compactionoflithicsands:experimen talresultsandapplications[J].AAPGBulletin,1991,75:12791298
[5] 李庆忠.走向精确勘探的道路[M ].北京:石油工业出版社,1994.
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