Lithology and oil-bearing properties of tight sandstone reservoirs: Chang 7 member of Upper Triassic Yanchang Formation, southwestern Ordos Basin, China
Lithology and oil-bearing properties of tight sandstone reservoirs: Chang 7 member of Upper Triassic Yanchang Formation, southwestern Ordos Basin, China
复制标题
鄂尔多斯盆地西南部上三叠统延长组长7段致密砂岩储层岩性及含油性
DOI：
10.1007/s12303-016-0048-3
复制
发表时间：
2017-03
影响因子：
1.2
通讯作者：
Shixiang Fei
中科院分区：
文献类型：
--
作者：
Congjun Feng;Hua Yang;Renhai Pu;Yaning Wang;Daxing Wang;Xiaowei Liang;Mengbo Zhang;Yougen Huang;Shixiang Fei
利用岩心、测井、地质分析、生产和试验资料，研究了鄂尔多斯盆地西南部上三叠统延长组长7段致密砂岩储层岩性、油水层及油层厚度的测井识别方法。该储层由两种岩石组成：细砂岩和粉砂岩。细砂岩有明显的油迹和油斑，这强烈表明石油的存在，因此这种岩石是优越的储层。粉砂岩基本上不显示出油，因此是一个非生产性层。采用密度和中子曲线归一化叠加方法对致密细砂岩、致密粉砂岩、泥岩和页岩进行了识别。致密细砂岩的识别标准为自然伽马值小于93 API（美国石油协会单位），归一化曲线之差大于0.05。利用电阻率-孔隙度图相对有效地识别油层或水层。致密油层的识别标准为(1)电阻率大于28 Ω·m，孔隙度大于9.5%或(2)电阻率在20 ~ 28 Ω·m，孔隙度大于9.5%，含油饱和度大于65%。在密度曲线和中子曲线归一化叠加岩性识别的基础上，结合致密油层划分标准，通过在电阻率曲线上叠加归一化差分曲线，准确确定了致密细砂岩油藏的厚度。
Using core, well logging, geological analysis, production, and test data, this study characterizes a method of well logging for identifying lithology, oil or water layers, and thickness of oil layers of tight sandstone reservoir in the Chang 7 member of the Upper Triassic Yanchang Formation, southwestern Ordos Basin, China. This reservoir consists of two rock types: fine sandstone and siltstone. The fine sandstone has distinct oil traces and flecks, which strongly indicate the presence of oil, and this rock is therefore the superior reservoir. The siltstone exhibits essentially no oil shows and thus is an unproductive layer. A method of density and neutron curve normalization and overlay was used to identify the tight fine sandstone, tight siltstone, mudstone, and shale. The criteria for identifying the tight fine sandstone are a natural gamma value of less than 93 API (American Petroleum Institute units) and a difference between the normalized curves exceeding 0.05. A resistivity-porosity plot was used to identify oil or water layers relatively effectively. The criteria for identifying the tight oil layers are (1) a resistivity exceeding 28 Ω·m and a porosity exceeding 9.5% or (2) a resistivity between 20 and 28 Ω·m, a porosity exceeding 9.5%, and an oil saturation exceeding 65%. Based on the lithologic identification via normalization and overlay of the density and neutron curves and the criteria for distinguishing the tight oil layers, the thickness of the tight fine sandstone oil reservoir was accurately determined by overlaying the normalized difference curve on the resistivity curve.
登录
查看更多内容
影响因子：
7.5
作者：
Kuang Lichun;Tang Yong;Liu Deguang
通讯作者：
Liu Deguang
DOI：
10.1016/b978-0-12-812234-1.00009-1
发表时间：
2017
期刊：
--
影响因子：
--
作者：
C. Zou
通讯作者：
C. Zou
DOI：
10.1016/b978-0-12-812234-1.09001-4
发表时间：
2012-12
期刊：
--
影响因子：
--
作者：
C. Zou
通讯作者：
C. Zou
影响因子：
7.5
作者：
Xinning Li;Qiang Ma;H. Liang;Pin Zhang;Qi Zhang;Xueli Jia;Zhenshan Pu;Li Yan;Yuanlin Meng
通讯作者：
Xinning Li;Qiang Ma;H. Liang;Pin Zhang;Qi Zhang;Xueli Jia;Zhenshan Pu;Li Yan;Yuanlin Meng
影响因子：
3.3
作者：
Haiyan Hu;Zhiping Zeng;Jianzhang Liu
通讯作者：
Haiyan Hu;Zhiping Zeng;Jianzhang Liu