第
40
卷第
2
期
煤 炭 学 报
Vol. 40 No. 2
2015
年
2
月
JOURNAL OF CHINA COAL SOCIETY
Feb. 2015
孟召平
,
郭彦
省
,
刘 尉
.
页岩气储层有机碳含量与测井参数的关系及预测模型
[J].
煤炭学报
,2015,40(2):247
- 253. doi:10.
13225 /j. cnki. jccs. 2014. 1490
Meng Zhaoping,Guo Yansheng,Liu Wei. Relationship between organic carbon content of shale gas reservoir and logging parameters and
its prediction model[J]. Journal of China Coal Society,2015,40(2):247 - 253. doi:10. 13225 / j. cnki. jccs. 2014. 1490
页岩气储层有机碳含量与测井参数的关系及预测模型
孟召平
1,2
,
郭彦省
1
,
刘 尉
1
(1.
中国矿业
大学
(
北京
)
地球科学与测绘工程学院
,
北京
100083;2.
三峡大学 三峡库区地质灾害教育部重点实验室
,
湖北 宜昌
443002)
摘 要
:
页岩气储层总有机碳
(TOC)
含量是页岩气评价的重要参数
,
如何准确
确定
TOC
含量是页
岩气勘探开发研究的一个关键问题
。
以黔江地区下志留统龙马溪组为研究对象
,
通过页岩气储层
有机碳含量测试和钻井测井资料的统计分析
,
研究了
TOC
含量的测井响应特征
,
优选了体积密度
(DEN)、
自然伽马
(GR )、
自然电位
(SP)
和声波时差
(AC)4
条测井曲线作为特征向量
,
建立了
TOC
含量的
BP
神经网络预测模型
,
改进了
BP
神经网络算法
,
并对黔江地区
1
口页岩气井下志留统龙
马溪组
TOC
含量进行了预测和对比分析
。
结果表明
:
基于测井参数的
BP
神经网络模型具有极强
的非线性逼近能力
,
能真实反映页岩气储层
TOC
含量与测井参数之间的非线性关系
,
预测结果与
实测值之间误差小
,
相对误差一般小于
10% 。
关键词
:
页岩气储层
;
测井参数
;
有机碳含量
(TOC)
;
预测模型
中图分类号
:P618. 13
文献标志码
:A
文章编号
:0253 - 9993(2015)
02 - 0247 - 07
收稿日期
:2014
-
11
-
05
责任编辑
:
韩
晋平
基金项目
:
国家重点基础研究发展计划
(973)
资助项目
(2012CB214705);
国家自然科学基金资助项目
(41372163,41172145)
作者简介
:
孟召平
(1963—),
男
,
湖南汨罗人
,
教授
,
博士生导师
,
博士
。E - mail:mzp@ cumtb. edu. cn
Relationship between organic carbon content of shale gas reservoir and
logging parameters and its prediction model
MENG Zhao-ping
1,2
,GUO Yan-sheng
1
,LIU Wei
1
(1. College of Geosciences and Surveying Engineering,China University of Mining and Technology(Beijing),Bei
jing 100083,China;2. Key Laboratory of
Geological Hazards on Three Gorges Reservoir Area,Ministry of Education,China Three Gorges University,Yichang 443002,China)
Abstract:Total organic carbon (TOC) content of shale gas reservoir is an important parameter of shale gas assess-
ment,and how to accurately determine the content of TOC is a key problem of shale gas exploration and develop-
ment. The author used the Lower Silurian Longmaxi formation in Qianjiang area as the research object . Through the
statistical analysis of TOC content testing of shale gas reservoir and drilling and logging data,the log response char-
acteristics of TOC content were analyzed. Furthermore,the four logs which consist of volume density logging(DEN )
,
gamma
logging(GR),spontaneous potential logging(SP) and acoustic logging(AC) were selected optimally as the
feature vector. Afterwards,the BP neural network prediction model of TOC content was established,the BP neural
network algorithm was improved and the TOC content of Lower Silurian Longmaxi formation of two shale gas wells in
Qianjiang area were predicted and compared. The results show that the BP neural network model based on logging
parameters has strongly approximate nonlinearization,which can reflect the nonlinear relationship between the TOC
content of shale gas reservoir and logging parameters. The error between prediction results and measured values is
small,and the relative error is less than 10% .
Key words:shale gas reservoir;logging parameters;total organic carbon (TOC ) content;prediction model