|本期目录/Table of Contents|

[1]陈民锋 杨子由 杨金欣.低渗透油藏井网整体加密调整技术界限[J].中国海上油气,2020,32(04):78-84.[doi:10.11935/j.issn.1673-1506.2020.04.009]
 CHEN Minfeng YANG Ziyou YANG Jinxin.Technical limits for the overall infilling and adjustment of well pattern in low permeability reservoirs[J].China Offshore Oil and Gas,2020,32(04):78-84.[doi:10.11935/j.issn.1673-1506.2020.04.009]
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低渗透油藏井网整体加密调整技术界限()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第32卷
期数:
2020年04期
页码:
78-84
栏目:
油气田开发
出版日期:
2020-07-25

文章信息/Info

Title:
Technical limits for the overall infilling and adjustment of well pattern in low permeability reservoirs
文章编号:
1673-1506(2020)04-0078-07
作者:
陈民锋12 杨子由2 杨金欣2
(1. 油气资源与探测国家重点实验室(中国石油大学(北京))北京 102249; 2. 中国石油大学(北京)石油工程学院 北京 102249)
Author(s):
CHEN Minfeng12 YANG Ziyou2 YANG Jinxin2
(1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China; 2. College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China)
关键词:
低渗透油藏 井网加密 势叠加原理 驱动压力梯度 储量有效动用
Keywords:
low permeability reservoir well pattern infilling potential superposition principle driving pressure gradient effective production of reserves
分类号:
TE348
DOI:
10.11935/j.issn.1673-1506.2020.04.009
文献标志码:
A
摘要:
定量表征低渗透油藏井网整体加密前后储量有效动用规律的变化,是油田制定合理开发调整策略的基础。基于实际低渗油田反九点井网整体加密调整方式,利用势叠加原理,得到了反映实际井网形式下的开发单元渗流场分布计算公式; 提出了“有效驱动压力梯度”的概念来反映流体在注采单元间的动用程度; 统计了不同区域的有效驱动压力梯度大小与注采单元控制范围的关系,进而建立了定量描述不同井网条件下储量有效动用规律的评价方法。研究表明,基础井网整体加密后,井距缩小、井间驱动压力梯度增大; 当原始井距大于300 m时,井网加密可以大幅提高储量动用程度,是井网加密调整的重点关注对象; 当原始井距小于200 m时,进行井网加密调整来提高储量动用程度的潜力较小,但若油藏储层较厚,可以酌情进行加密
Abstract:
A large number of low-contrast oil reservoirs are distributed in the shallow layers of Enping area in the eastern South China Sea, whose particle composition is dominated by very fine sand. The high adsorption of radioactivity by fine-grained components results in high natural gamma-ray in such reservoirs, and the contrast between its conventional logging features and that of mudstone is low. This paper uses the obvious difference between the NMR logging of mudstone and low-contrast sandstone to extract the “large porosity” curve from the T2 spectrum of NMR logging data. It is believed that “large porosity” is the comprehensive response of the sandstone reservoir spaces with different grain sizes, and it is able to represent the lithologic grain size components of the formation. The log response equation of “large porosity” can be further derived, and the optimal log interpretation objective function can be constructed by combining with the response equation of conventional logging data to carry out joint inversion of formation lithology and further obtain the accurate content of very fine sand composition. This method has been widely used in the shallow layers of Enping area, and a large number of low contrast oil layers have been identified, which achieves a good reserve increasing effect

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备注/Memo

备注/Memo:
收稿日期:2020-01-15 改回日期:2020-04-26*“十三五”国家科技重大专项“油气资产价值评估体系研究(编号:2016ZX05033-005-007)”部分研究成果。 第一作者简介: 陈民锋,男,副教授,博士,主要从事油田开发系统理论方法和提高采收率研究工作。地址:北京市昌平区府学路18号(邮编:102249)。E-mail:cmfllp96@126.com。 通信作者简介: 杨子由,男,在读硕士研究生,主要从事油田开发系统理论方法研究工作。地址:北京市昌平区府学路18号(邮编:102249
更新日期/Last Update: 2020-07-20