多分支水平对接井瓦斯产量预测与参数优化

doi:10.16265/j.cnki.issn1003-3033.2017.11.017

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (11): 97-102.doi: 10.16265/j.cnki.issn1003-3033.2017.11.017

多分支水平对接井瓦斯产量预测与参数优化

邓存宝¹ 教授, 凡永鹏¹, 张勋^1,2, 黎凤岐³ 高级工程师

1 辽宁工程技术大学矿业学院,辽宁阜新 123000
2 山西焦煤集团有限责任公司,山西太原 030053
3 华晋煤层气综合利用有限责任公司,山西吕梁 033000

收稿日期:2017-08-10 修回日期:2017-10-09 发布日期:2020-10-21
作者简介:邓存宝 (1964—),男,山西大同人,教授,博士生导师,主要从事矿井瓦斯灾害防治和防灭火研究。E-mail:dengcunbao323@163.com。
基金资助:
国家自然科学基金资助(51574143,51604144);国家科技重大专项资助项目(2016ZX05067005-003)。

Prediction of methane productivity of multiple branches horizontally-butted well and parameter optimization

DENG Cunbao¹, FAN Yongpeng², ZHANG Xun^1,3, LI Fengqi⁴

1 College of Mining Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China
2 Shanxi Coking Coal Group Co. Ltd. , Taiyuan Shanxi 030053,China
3 Huajin Comprehensive Utilization of Coal Gas Ltd. ,Lyuliang Shanxi 033000,China

Received:2017-08-10 Revised:2017-10-09 Published:2020-10-21

摘要/Abstract

摘要： 为增强多分支水平对接井对煤层瓦斯(甲烷)治理效果,提高瓦斯抽采率,采用流体力学、渗流力学相关理论构建多分支水平对接井产量预测模型。以沙曲矿工程地质条件为背景,验证模型的有效性,研究多分支水平井井筒单位长度瓦斯流入量分布情况,分析钻井的形态结构对其产量的影响。结果表明:多分支水平井主井瓦斯流入量呈U型分布,交汇点处瓦斯流入量呈下凹趋势,分支井瓦斯流入量随距交汇点的距离增加而增加;在相同进尺和夹角的情况下,非对称结构钻井比对称结构钻井产量高,增加分支井筒数目,钻井产量减小;钻井产量随着主井和分支井的夹角增大而增高,但增幅不断下降。

关键词: 煤层气, 多分支水平对接井, 产量, 分支参数, 计算模型

Abstract: In order to enhance the effect of multiple branches horizontally-butted well for gas (methane) control and improve gas drainage rate, a model was built for production prediction. With the engineering background in Shaqu coal mine,the effectiveness of the model was authenticated, the distribution of gas inflow per unit length of well bore was studied, the effect of drilling morphology on its productivity was analyzed, The results show that the gas inflow into the main well of multiple branches horizontally-butted well has an u-shaped distribution, the gas inflow at the intersection is concave, the gas inflow into branch wells increases with the distance from the intersection point, that when the footage and the angle are the same, production of well bore with asymmetric structure is higher than that of the well bore with symmetric structure, that the productivity of horizontal wells increases with the increase of the angle between the main and branch well, and that when the total length of branch wells is constant, the productivity decreases with the increase of the number of multilateral wells.

Key words: coal bed methane, multiple branches horizontally-butted well, productivity, branch parameter, calculation model

中图分类号:

X936

邓存宝教授, 凡永鹏, 张勋, 黎凤岐高级工程师. 多分支水平对接井瓦斯产量预测与参数优化[J]. 中国安全科学学报, 2017, 27(11): 97-102.

DENG Cunbao, FAN Yongpeng, ZHANG Xun, LI Fengqi. Prediction of methane productivity of multiple branches horizontally-butted well and parameter optimization[J]. China Safety Science Journal, 2017, 27(11): 97-102.

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多分支水平对接井瓦斯产量预测与参数优化

Prediction of methane productivity of multiple branches horizontally-butted well and parameter optimization

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