大型低渗-致密气田井网加密提高采收率对策——以鄂尔多斯盆地苏里格气田为例

doi:10.7623/syxb201807007

石油学报 ›› 2018, Vol. 39 ›› Issue (7): 802-813.DOI: 10.7623/syxb201807007

大型低渗-致密气田井网加密提高采收率对策——以鄂尔多斯盆地苏里格气田为例

贾爱林, 王国亭, 孟德伟, 郭智, 冀光, 程立华

中国石油勘探开发研究院北京 100083

收稿日期:2017-11-07 修回日期:2018-04-02 出版日期:2018-07-25 发布日期:2018-08-01
通讯作者: 王国亭,男,1982年3月生,2007年获中国地质大学(北京)学士学位,2013年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院高级工程师,主要从事低渗、致密气藏开发相关研究。Email:wgting@petrochina.com.cn
作者简介:贾爱林,男,1966年9月生,1989年获石油大学(华东)学士学位,2006年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院教授级高级工程师,主要从事气田开发相关研究。Email:jal@petrochina.com.cn
基金资助:
国家科技重大专项（2016ZX05015-001）和中国石油天然气股份有限公司"十三五"重大专项（2016E-0504）资助。

Well pattern infilling strategy to enhance oil recovery of giant low-permeability tight gasfield: a case study of Sulige gasfield,Ordos Basin

Jia Ailin, Wang Guoting, Meng Dewei, Guo Zhi, Ji Guang, Cheng Lihua

PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Received:2017-11-07 Revised:2018-04-02 Online:2018-07-25 Published:2018-08-01

摘要/Abstract

摘要：

提高采收率是中国低渗-致密气田稳产期间面临的核心问题，确定合理的加密井网是提高储量动用程度的关键。通过明确苏里格气田有效储层规模尺度与4种空间组合类型，评价指出气田动静储量比仅为15.3%，储量动用程度低剩余储量规模大，划分出直井未动用、水平井遗留和井间剩余3种剩余储量类型。提出了井网加密是提高井间剩余储量动用程度的有效措施，构建了采收率、采收率增量、平均气井产量、加密井增产气量、产量干扰率等井网加密评价指标体系，确立了合理加密井网需满足的标准。结合地质模型、数值模拟、密井网试验数据验证等手段综合评价认为，合理加密井网应与有效储层组合类型相匹配、与气价及成本条件密切相关。在目前气价波动范围及经济技术条件下，苏里格气田采用4口/km²的加密井网是合理的。

关键词: 低渗-致密气田, 储量动用程度, 剩余储量, 提高采收率, 井网加密, 合理井网

Abstract:

Enhancing oil recovery is an essential issue during the stable production of low-permeability tight sandstone gasfields in China, and the reasonable infilled well pattern is determined as the key to improve reserve producing degree. The effective reservoir scale and four types of space assemblage are identified, and the assessment indicates that the ratio between dynamic and static geological reserves (RDS)is only 15.3% in Sulige gasfield. The reserve producing degree is very low, while the residual reserve scale is large, divided into vertical-well unemployed reserve, horizontal-well remaining reserve and inter-well residual reserve. It is proposed that well pattern infilling is an effective measure to improve inter-well residual reserve, and the evaluation index system is constructed including recovery ratio, recovery increment, average gas well production, increased gas production of infilled well and production interference ratio. Meanwhile, the standard for reasonable infilled well pattern is also determined. Through geologic model, numerical simulation, test data verification of dense well pattern and other means, it is comprehensively concluded that the reasonable infilled well pattern is matched with effective reservoir assemblage type and closely related to natural gas price and relevant cost. In current gas price fluctuation range and economic-technological conditions, the infilled well pattern of 4 wells/km² is reasonable.

Key words: low-permeability tight gasfield, reserve employed degree, residual reserves, enhance oil recovery, well pattern infilling, reasonable well pattern

中图分类号:

TE324

贾爱林, 王国亭, 孟德伟, 郭智, 冀光, 程立华. 大型低渗-致密气田井网加密提高采收率对策——以鄂尔多斯盆地苏里格气田为例[J]. 石油学报, 2018, 39(7): 802-813.

Jia Ailin, Wang Guoting, Meng Dewei, Guo Zhi, Ji Guang, Cheng Lihua. Well pattern infilling strategy to enhance oil recovery of giant low-permeability tight gasfield: a case study of Sulige gasfield,Ordos Basin[J]. Acta Petrolei Sinica, 2018, 39(7): 802-813.

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大型低渗-致密气田井网加密提高采收率对策——以鄂尔多斯盆地苏里格气田为例

Well pattern infilling strategy to enhance oil recovery of giant low-permeability tight gasfield: a case study of Sulige gasfield,Ordos Basin

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