致密砂岩气藏水平井分段压裂优化设计与应用

doi:10.7623/syxb201305018

石油学报 ›› 2013, Vol. 34 ›› Issue (5): 959-968.DOI: 10.7623/syxb201305018

致密砂岩气藏水平井分段压裂优化设计与应用

曾凡辉, 郭建春, 刘恒, 尹建

西南石油大学油气藏地质及开发工程国家重点实验室四川成都 610500

收稿日期:2013-03-01 修回日期:2013-05-31 出版日期:2013-09-25 发布日期:2013-08-01
通讯作者: 曾凡辉
作者简介:曾凡辉,男,1980年12月生,2004年获西南石油学院学士学位,2009年获西南石油大学油气田开发工程专业博士学位,现为西南石油大学讲师,主要从事油气藏开采理论方面的研究和现场应用工作。Email:zengfanhui023024@126.com
基金资助:
中央财政支持地方高校发展专项资金特色重点学科项目;四川省青年科技创新研究团队资助计划(2011JTD0018)和西华大学流体及动力机械省部共建教育部重点实验室项目(szjj2013-004)资助。

Optimization design and application of horizontal well staged fracturing in tight gas reservoirs

ZENG Fanhui, GUO Jianchun, LIU Heng, YIN Jian

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

Received:2013-03-01 Revised:2013-05-31 Online:2013-09-25 Published:2013-08-01

摘要/Abstract

摘要：

针对川西沙溪庙组致密砂岩气藏水平井开展了分段压裂优化设计及现场应用研究。采用水平井分段压裂诱导应力场模型,以提高储层整体渗流能力为目标,优选了裂缝起裂次序、裂缝间距和射孔参数,通过优化压裂施工净压力和排量沟通了主裂缝周围的天然裂缝。现场实施结果表明:优化后的水平井压裂8~13段,每段内射孔2~3簇,每簇长度为0.5 m,相同压裂段内簇间距为30~60 m;采用中间为12~16孔/m、两端为16~20孔/m的变密度射孔,优化排量为3.5~6.5 m³/min;采用优化设计技术实施的5口井平均稳定产量为5.3×10⁴m³/d,较优化前有明显提高,取得了显著的经济效益,为同类型致密砂岩气藏的水平井分段压裂优化设计提供了借鉴。

关键词: 致密气藏, 水平井, 分段压裂, 优化设计, 现场应用

Abstract:

A field study on the optimization design and application of horizontal well staged fracturing for Shaximiao tight sandstone gas reservoir in western Sichuan was carried out. It used induced stress field model of horizontal well staged fracturing which was establish to improve the overall percolation ability of reservoir. Meanwhile, fracture initiation sequence, fracture spacing and perforation parameters were optimized. And the optimization of fracture net pressure and displacement communicated natural fractures around the main fractures. The field implementation of horizontal well staged fracturing demonstrated that: fracture segments increased to 8-13 after optimization, with 2-3 clusters in each perforating section and a length of 0.5 m for per cluster, and the cluster spacing of the same fracture segment was 30-60 m; these variable density perforation parameters were 12-16 holes/m in the middle, 16-20 holes/m at two terminals, and displacement reached to 3.5-6.5 m³/min; the average steady production of 5 wells by using optimization method was 5.3×10⁴m³/d, increasing significantly compared with previous status, and it also obtained significant economic benefits. The optimized design method can provide a reference for optimization design of similar tight gas reservoirs.

Key words: tight gas reservoir, horizontal well, staged fracturing, optimization design, filed application

中图分类号:

TE357

曾凡辉, 郭建春, 刘恒, 尹建. 致密砂岩气藏水平井分段压裂优化设计与应用[J]. 石油学报, 2013, 34(5): 959-968.

ZENG Fanhui, GUO Jianchun, LIU Heng, YIN Jian. Optimization design and application of horizontal well staged fracturing in tight gas reservoirs[J]. Editorial office of ACTA PETROLEI SINICA, 2013, 34(5): 959-968.

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致密砂岩气藏水平井分段压裂优化设计与应用

Optimization design and application of horizontal well staged fracturing in tight gas reservoirs

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