[1]代 玲,赵澄圣.基于Fisher和概率法的储层流动单元指数分类判别方法[J].复杂油气藏,2021,14(02):73-79.[doi:10.16181/j.cnki.fzyqc.2021.02.014]
 DAI Ling,ZHAO Chengsheng.Classification and discrimination method of reservoir flow unit index based on Fisher and probability method[J].Complex Hydrocarbon Reservoirs,2021,14(02):73-79.[doi:10.16181/j.cnki.fzyqc.2021.02.014]
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基于Fisher和概率法的储层流动单元指数分类判别方法
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
14卷
期数:
2021年02期
页码:
73-79
栏目:
油气开发
出版日期:
2021-06-25

文章信息/Info

Title:
Classification and discrimination method of reservoir flow unit index based on Fisher and probability method
作者:
代 玲赵澄圣
中海石油(中国)有限公司深圳分公司惠州油田,广东 深圳518000
Author(s):
DAI LingZHAO Chengsheng
Huizhou Oilfield,Shenzhen Branch,CNOOC (China) Co.,Ltd.,Shenzhen 518000,China
关键词:
储层分类中低孔砂岩渗透率Fisher判别概率判别
Keywords:
reservoir classificationmedium low porosity sandstonepermeabilityFisher discriminantprobability discriminant
分类号:
TE321
DOI:
10.16181/j.cnki.fzyqc.2021.02.014
文献标志码:
A
摘要:
不同于高孔高渗的砂岩地层,中低孔低渗砂岩储层孔隙结构较为复杂,孔渗关系不再趋向为一条单一的直线,而是随孔隙度变小而发散,单一线性关系式不能满足低渗储层的描述精度,影响储层参数的计算精度,最终导致流体识别符合率降低。从实际资料出发,以现有的物性分析资料为基础,利用数学方法准确求取流动单元指数,实现全井段的流动单元指数计算;通过流动单元指数将储层划分成Ⅰ、Ⅱ、Ⅲ类,可有效提高储层参数的计算精度,并提出通过Fisher算法和概率法建立流动单元指数分类的判别方法。实际应用表明,相比Fisher判别法,概率判别法在预测储层流动单元指数分类判别中精度更高。
Abstract:
Different from sandstone formations with high porosity and high permeability,it is more complicated the pore structure of medium-low porosity and low permeability sandstone reservoir. The porosity-permeability relationship no longer tends to be a single straight line but diverges as the porosity decreases. A single linear relationship can not meet the description accuracy of low-permeability reservoirs,affects the calculation accuracy of reservoir parameters,and finally leads to a decrease in the coincidence rate of fluid identification. Therefore,starting from actual data,based on the existing physical property analysis data,the flow unit index is accurately calculated by mathematical methods to realize the calculation of the flow unit index for the entire well section. Dividing reservoirs into I,II,and III categories through flow unit index can effectively improve the calculation accuracy of reservoir parameters,and the discrimination method is proposed to establish the classification of flow unit index through the Fisher algorithm and probability method. Practical applications show that,compared with the Fisher discriminant method,the probability discriminant method has higher accuracy in predicting classification and discrimination of reservoir flow unit index,which provides a more effective research method for reservoir fine evaluation.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2021- 02-07;改回日期:2021-03-05。
第一作者简介:代玲(1972—),女,硕士,主任工程师,主要从事开发地质研究工作。E-mail:dailing@cnooc.com.cn。
更新日期/Last Update: 2021-06-30