一种无完井资料过套管浅层气测井精细评价方法

谢进庄，杨景海，宋延杰

doi:10.11764/j.issn.1672-1926.2012.06.1140

天然气地球科学 >

2012 , Vol. 23 >Issue 6: 1140 - 1147

DOI: https://doi.org/10.11764/j.issn.1672-1926.2012.06.1140

天然气勘探

一种无完井资料过套管浅层气测井精细评价方法

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1.中国石油大庆油田测试技术服务分公司，黑龙江大庆163453； 2.东北石油大学地球科学学院，黑龙江大庆163318

谢进庄(1965-)，男，河南尉氏人，高级工程师，博士，主要从事石油测井研究. E-mail：dlts_xiejz＠petrochina.com.cn.

收稿日期: 2012-04-20

修回日期: 2012-05-27

网络出版日期: 2012-12-10

基金资助

中国石油天然气股份有限公司重大科技项目“大庆油田原油4000万t持续稳产关键技术研究”(编号：2008E-12)资助.

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A Fine Evaluation Method of Shallow Gas Logging Cased Hole without Open Hole Logging Data

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1.Daqing Well Logging and Testing Services Company, PetroChina,Daqing 163453, China;
2.College of Geosciences,Northeast Petroleum University, Daqing 163318, China

Received date: 2012-04-20

Revised date: 2012-05-27

Online published: 2012-12-10

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摘要

针对大庆油田葡南地区老井浅层没有完井测井信息不能进行气层评价的问题，在套管井中进行中子寿命测井和补偿中子测井，基于气层的测井响应特征，给出了定性识别气层的2个有效参数以及4组重叠曲线，利用套管井中子寿命远探测器俘获计数率曲线和补偿中子远探测器计数率曲线首次建立了钙层指示曲线，能够有效地区分钙层与气层，实现了气层快速直观精细解释。利用中子寿命测井近、远探测器俘获计数率以及热中子宏观俘获截面测井曲线组建了一条对气层识别比较敏感的GI 1曲线，利用该曲线建立了新的含气饱和度模型，对气层进行了定量解释。以试气资料为基础，综合气层定性、定量识别方法，确定了气层、气水同层、水层的多参数判别标准。经过试气验证表明该解释方法正确，能够满足大庆油田葡南地区老井浅层天然气评价工作需要。

关键词： 中子寿命测井; 补偿中子测井; 套管井; 浅层气; 钙层; 含气饱和度; 精细评价

本文引用格式

谢进庄，杨景海，宋延杰 . 一种无完井资料过套管浅层气测井精细评价方法[J]. 天然气地球科学, 2012 , 23(6) : 1140 -1147 . DOI: 10.11764/j.issn.1672-1926.2012.06.1140

Abstract

Aiming at the problem that gas reservoir can′t be evaluated without open hole logging data in shallow gas layers of old wells in the Daqing Punan region,we do the neutron lifetime logging and compensated neutron logging in the cased hole.According to logging response characteristics of gas reservoir,we get two effective gas parameters and four groups of overlapping curves to qualitatively identify the gas reservoir.We use the far detector count rate curves of the neutron lifetime log and compensated neutron log to establishe the calcium layer indication curve.It can effectively identify the calcium layer and gas layer and achieve a fast and intuitive fine interpretation of gas.The GI 1 curve which is sensitive to gas identification is established based on capture count rate of near and far detector of neutron lifetime logging and the thermal neutron macroscopic capture cross section of logs.We use this curve to setup a new gas saturation model to achieve quantitative interpretation of gas.According to gas testing data as well as gas qualitative identification and quantitative identification,the standard of multi-parameter identification of gas layer,gas-water layer and water layer is determined.The gas testing has proved the interpretation method to be useful.Therefore,this model can meet the requirement of gas layer evaluation for the shallow layers of old wells in the Daqing Punan region.

Key words： Neutron lifetime log; Compensated neutron log; Cased hole; Shallow gas; Calcium layer; Gas saturation; Fine evaluation

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