火山岩气藏井控动态储量变化规律及预测方法

任东, 董家辛, 王志平, 王少军, 徐梦雅

doi:10.11764/j.issn.1672-1926.2016.06.1110

天然气地球科学 >

2016 , Vol. 27 >Issue 6: 1110 - 1115

DOI: https://doi.org/10.11764/j.issn.1672-1926.2016.06.1110

天然气开发

火山岩气藏井控动态储量变化规律及预测方法

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1.中国石油天然气股份有限公司,北京 100007；2.中国石油勘探开发研究院,北京 100083

任东（1968-），男，高级工程师，博士，主要从事油气田开发、气田方案等研究. E-mail:dongren@petrochina.com.cn.

收稿日期: 2015-06-09

修回日期: 2015-08-14

网络出版日期: 2019-09-19

基金资助

国家高技术研究发展计划（“863”计划）“致密砂岩油气藏数值模拟技术与软件”（编号：2013AA064902）；中国石油勘探开发研究院院级项目（编号：2012Y-043；2012Y-042）联合资助.

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Prediction methods of the OGIP for the single well in volcanic gas reservoirs

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1.PetroChina Company Ltd.,Beijing 100007,China;
2.Research Institute of Petroleum Exploration & Development,PetroChina,Beijing 100083,China

Received date: 2015-06-09

Revised date: 2015-08-14

Online published: 2019-09-19

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摘要

火山岩气藏发育有不同尺度的孔洞缝多重介质，孔隙结构复杂，非均质性强，物性差异大，导致开发过程中单井井控动态储量差异较大。研究表明，火山岩气井井控动态储量会随气井的生产而发生变化，对于低渗低效储层及多重介质储层，气井井控动态储量随生产时间的延长而增加；低渗致密储层压裂产生的裂缝可以增大气井的控制面积，从而增大井控动态储量；同时，部分气井的井控动态储量受边底水的影响而减小。常规井控储量计算方法计算结果偏小，不适用于火山岩气藏。在分析不同类型储层气井的井控动态储量变化规律的基础上，建立了相应的井控动态储量预测方法。通过实际气井数据计算，结果表明，该方法可以在气井生产时间较短的情况下预测最终状态的井控动态储量，且结果较为可靠。

关键词： 火山岩气藏; 井控动态储量; 变化规律; 预测方法

本文引用格式

任东, 董家辛, 王志平, 王少军, 徐梦雅 . 火山岩气藏井控动态储量变化规律及预测方法[J]. 天然气地球科学, 2016 , 27(6) : 1110 -1115 . DOI: 10.11764/j.issn.1672-1926.2016.06.1110

Abstract

Different from conventional sedimentary reservoirs,the storage space in volcanic gas reservoirs,with different-sized pore-fracture array modes,is quite complicated.This leads to the variations of OGIP in volcanic gas wells,and the variations are as follows: for low-permeability reservoirs,the OGIP tends to increase with the extension of production time,due to the increasing drainage radius;for the dual-media reservoirs,the OGIP also increases with the extension of production time,but itis mainly caused by the effect of relay gas supply mechanism;meanwhile,fracturing can increase the gas well supply area,and thus increase the OGIP.According to the variation rules,OGIP prediction methods for different-types reservoirs are established.For the low-permeability reservoirs and the fractured reservoirs,the prediction methods are based on the prediction of the max drainage radius;while for the dual-media reservoirs,the OGIP predictions are built on a typical curve chart.The new methods are applied to actual production data calculation.The results show that the new methods are more precise in predicting OGIP when the gas well production time is relatively short.

Key words： Volcanic gas reservoirs; Prediction methods; OGIP of single well; Variations of the OGIP

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