收稿日期: 2017-04-01
修回日期: 2017-07-17
网络出版日期: 2017-09-10
基金资助
国家科技重大专项(编号:2016ZX05067006-002)资助.
Forecast and validation of coal reservoir fractures based on structural fracture mapping technology
Received date: 2017-04-01
Revised date: 2017-07-17
Online published: 2017-09-10
利用构造裂隙填图技术,在新疆阜康白杨河矿区地表围岩中实测了388个观测点,根据观测点构造裂隙的发育特征划分破碎等级,预测了地下煤储层构造裂隙的优势方向和发育特征,并利用6口煤层气井的产量数据、压裂曲线和井径扩大率进行验证。结果表明:地表围岩中观测点破碎等级较高的区块,煤储层内构造裂隙系统发育,天然裂隙联通情况良好,渗透率较高,煤层气井产量较高,压裂曲线的形态以先高后低型和波浪型为主,井径扩大率一般大于15%以上;观测点破碎等级低的区块,煤储层内构造裂隙系统发育不足或严重不足,天然裂隙联通情况较差,渗透率较低,煤层气产量为中产或低产,压裂曲线的形态为上升型,井径扩大率一般小于7%。利用该方法预测煤储层构造裂隙发育特征与工程数据吻合度较高,证明了该方法的有效性和可靠性,为有类似地质条件的煤层气开发区块煤储层裂隙系统预测,提供了一种新思路和新技术。
张洲,王生维,周敏 . 基于构造裂隙填图技术的煤储层裂隙发育特征预测与验证[J]. 天然气地球科学, 2017 , 28(9) : 1356 -1362 . DOI: 10.11764/j.issn.1672-1926.2017.07.008
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