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川西北地区双鱼石区块栖霞组沉积微相特征
The characteristic of sedimentary microfacies in qixia formation in Shuangyushi area, northwest Sichuan
蒲柏宇 张连进 兰雪梅 刘曦翔 王俊杰 文 雯 徐昌海
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作者单位:中国石油天然气股份有限公司碳酸盐岩储层重点实验室——四川盆地研究室
中文关键字:川西北地区 双鱼石区块 早二叠世 栖霞期 沉积微相 台地边缘 古地貌恢复
英文关键字:Shuangyushi area; Qixia formation; sedimentary microfacies; platform margin
中文摘要:近年来,以双鱼X131、双鱼X133 井为代表,川西北双鱼石地区部署的多口井在栖霞组钻遇厚层的孔隙型白云岩,并获得超过百万方的高产工业气流,展示了该地区栖霞组良好的勘探前景。研究区栖霞组储层的发育情况受相控明显,为明确川西北双鱼石地区下二叠统栖霞组沉积微相类型及有利相带分布,提高油气勘探效益,本次研究主要利用了野外剖面测量、岩心描述、铸体薄片鉴定、成像测井分析等方法对栖霞组沉积相特征进行了研究并得出了以下结论:①建立了微相识别模板,将栖霞组划分出4 种亚相、5 种微相并分析了对应特征;②结合9 口单井的微相划分及连井相剖面分析,认为滩核、滩缘微相为最有利相带,纵向上主要位于栖霞二段,横向分布稳定;③结合相对海平面变化,应用趋势面法恢复了双鱼石地区栖霞组古地貌,并进一步得出沉积微相平面展布特征。以上研究为该区栖霞组后续的优质储层研究及井位部署提供了地质依据。
英文摘要:To determine the distribution of favorable sedimentary facies in qixia formation of lower Permian in Shuangyushi area, northwest sichuan,and Improve the efficiency of oil and gas exploration and development, combined with well logging and seismic data, we have studied the characteristics of sedimentary facies based on core description of 9 Wells、several field profiles.Finally we think that two sedimentary facies zones, four subfacies and five microfacies are mainly developed in qixia formation, including platform margin facies and open platform facies. The microfacies of beach core and beach margin are the most favorable facies zone and they distribute widely. Combined with the changes in relative sea level and the sedimentary facies profile analysis of single well and continuous well, we used trend surface method to restore the ancient landform of qixia formation and analyzed the planar distribution characteristics of sedimentary microfacies in Shuangyushi area. These studies provide geological basis for subsequent reservoir study
and well location deployment.
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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
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