[1]罗少成,成志刚,唐冰娥,等.致密砂岩储层胶结指数m和岩性系数a的研究[J].复杂油气藏,2014,(04):1.
　Luo Shaocheng,Cheng Zhigang,Tang Bing'e,et al.Study on cementation exponent m and lithology factor a for tight sand reservoir[J].Complex Hydrocarbon Reservoirs,2014,(04):1.
点击复制

致密砂岩储层胶结指数m和岩性系数a的研究
分享到：

《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
期数:
2014年04期
页码:
1
栏目:
油气勘探
出版日期:
2014-12-25

文章信息/Info

Title:
Study on cementation exponent m and lithology factor a for tight sand reservoir
作者:
罗少成1; 成志刚1; 唐冰娥2; 肖 飞1; 彭怡眉1; 牟明洋1
1.中国石油测井有限公司油气评价中心,陕西 西安 710077; 2.中国石油测井有限公司长庆事业部,陕西 西安 710201
Author(s):
Luo Shaocheng1; Cheng Zhigang1; Tang Bing'e2; Xiao Fei1; Peng Yimei1; Mu Mingyang1
1.Reservoirs Evaluation Center,China Petroleum Logging CO.LTD.,Xi'an 710077,China; 2.Changqing Division,China Petroleum Logging CO.LTD.,Xi'an 710201,China
关键词:
致密砂岩储层 地层因素 孔隙度 胶结指数 岩性系数 导电效率
Keywords:
tight sand reservoir;  formation factors;  porosity;  cementation exponent;  lithology factor;  electrical efficiency
分类号:
TE122.23
文献标志码:
A
摘要:
利用Archie公式计算储层含水饱和度时,岩性系数a和胶结指数m通常取区域某一固定值,但在致密砂岩储层实际应用中发现,地层因素和孔隙度的关系与典型的Archie公式特征不符,其相关性较差,通过不同的回归处理方法得到的a和m值有时相差较大。利用××油田致密砂岩储层14口井130块岩心岩电实验资料进行统计分析:不同井区确定的岩性系数a和胶结指数m具有很好的相关性,存在明显的幂函数关系,且a和m值变化范围很大,呈现高a低m的特征,强制将a近似为1与实际不符; 地层因素和孔隙度在lg(F)-lg(φ)坐标系下,以三次函数关系拟合可以将整套实验数据统一起来,即m与lg(φ)存在一元二次函数关系。通过对胶结指数m的机理分析,引入导电效率,采用数值模拟方法推导出了m的计算公式。通过对比分析,采用变a和变m计算的地层因素与岩电实验测试结果符合程度更高,有利于提高含油饱和度计算精度。
Abstract:
When Archie formula is applied to calculate water saturation of the reservoir,the cementation exponent,m,and lithology factor,a,are usually taken at a fixed value in target area.But in tight sand reservoirs,the relationship between formation factor and porosity is different from Archie formula description,and the values of a and m calculated by various regression methods sometimes are different.Litho-electric experiment data of 130 cores taken from 14 wells were statistically analyzed in tight sand reservoirs of ×× oilfield.It was found that there was a power function between lithology factor,a,and cementation exponent,m.The values of a and m have a large variation range,presenting a trend of bigger a and smaller m.The value of a was approximated one that was inconsistent with the actual.In logarithmic coordinate of formation factor and porosity,the cubic function is the best correlation,in other words,there is a quadratic function between m and logarithm of porosity.According to the mechanism analysis of cementation exponent,m,introducing electrical efficiency,a formula for m was derived by using mathematical simulation method.After comparison,it was indicated that the formation factors calculated by variables of a and m are more consistent with the litho-electric experiment data,which can improve the calculating precision of oil saturation.

参考文献/References:

[1] Archie G E.The electrical resistivity log as an aid in determining some reservoir characteristics[J].Trans.AIME,1942,146:54-61.
[2] 荆万学,陈永吉.浅探阿尔奇公式的物理学原型[J].测井技术,1997,21(4):289-291.
[3] 中国石油勘探与生产分公司.低孔低渗油气藏测井评价技术及应用[M].北京:石油工业出版社,2009:38-41.
[4] 王建功,蔡文渊,罗安银,等.二连地区复杂砂岩胶结指数m和系数a的研究[J].测井技术,2010,34(5):449-452.
[5] 李军,张超谟,肖承文,等.库车地区砂岩孔隙结构对胶结指数影响及饱和度误差分析[J].测井技术,2009,33(4):325-328.
[6] 毛志强.油藏条件下饱和度测井解释基础实验、理论和应用研究[D].北京市勘察设计研究院,1995.

备注/Memo

备注/Memo:
收稿日期:2014-06-28; 改回日期:2014-08-16。
作者简介:罗少成(1983—),硕士,工程师,从事测井方法研究与解释评价工作。电话:18706718519,E-mail:lsc0222@126.com。
基金项目:中国石油天然气股份有限公司重大科技专项“鄂尔多斯盆地致密油层测井识别与评价技术研究”(2011E-2602)。
更新日期/Last Update: 2014-12-25