测井技术2017，Vol.41Issue(5)：583-589,7.DOI:10.16489/j.issn.1004-1338.2017.05.017
综合成像测井和常规测井资料计算致密油薄互层砂地比
Comprehensive Application of Imaging and Conventional Logging Data to Calculate NTG of Thin Interbed of Tight Oil Reservoir
赵杰 1付晨东 2王艳 2曾鑫 3孙建孟3
作者信息
- 1. 大庆油田有限责任公司勘探事业部,黑龙江大庆163453
- 2. 大庆钻探工程公司测井公司,黑龙江大庆163412
- 3. 中国石油大学(华东)地球科学与技术学院,山东青岛266580
- 折叠
摘要
Abstract
The lithology of thin interbed in G3 and G4 tight oil layers of the Qingshankou formation in the Qijia area of Songliao Basin has a significant effect on the oil-bearing property.In order to calculate the thickness ratio of oil-bearing lithology to the formation accurately(net-to-gross ratio),the thickness,lithology and oil-bearing characteristics of thin interbed are firstly analyzed,and then the SRES curve was used to calculate the net-to-gross ratio(NTG) in different window lengths with 10 Ω · m.m as the oil-bearing limitation.At the same time,based on the resistivity anisotropy model of thin interbed,the NTG was estimated by using the conventional lateral and induction resistivity.In order to analyze remaining oil properties of formations,a cross-plot between sand ratio and resistivity was established.The imaging logging can identify the thin layer more effectively.The thin layer has seven types of lithology with different resistivities and mineral contents.The lower limit of the bearing-oil lithology is muddy siltstone,and the NTG calculated based on the imaging and conventional logging curves can reflect the lithology of the formation effectively.The cross-plot shows that when the sandstone ratio is less than 0.5 and the resistivity is less than 10 Ω · m.m,the formation does not contain oil.When the sand ratio is greater than 0.5 and the resistivity is greater than 10 Ω · m.m,the formation contains oil.Especially when the resistivity is greater than 22 Ω · m.m,the formation contains more oil.The sand ratio can contribute to the identification of effective reservoir and the selection of fracturing interval.关键词
测井解释/致密油/薄互层/砂地比/成像电阻率/电阻率/各向异性Key words
log interpretation/tight oil/thin interbed/net-to-gross ratio/imaging resistivity/resistivity anisotropy分类
信息技术与安全科学引用本文复制引用
赵杰,付晨东,王艳,曾鑫,孙建孟..综合成像测井和常规测井资料计算致密油薄互层砂地比[J].测井技术,2017,41(5):583-589,7.
