中高渗断块油藏提高采收率技术实践——以济阳坳陷东营凹陷纯47块为例

doi:10.13809/j.cnki.cn32-1825/te.2024.06.013

摘要/Abstract

摘要：

中国东部老油田大部分已进入高含水率开发阶段，特别是中高渗断块油藏。如何提高高含水油藏采收率是老区稳产和延长经济开发期的关键。济阳坳陷东营凹陷纯47块油藏是中高渗断块油藏，根据油藏特征不同阶段采用适配井网、差异化调整等开发策略，实现高效开发，目前采出程度为78.5%，标定采收率为84%。研究其高效开发机理、探究区块开发规律，具有一定的学术和推广价值。从地质特征、储层宏观、微观特征、流体性质和开发策略上对其进行了剖析，指出良好的储层物性条件是该油藏取得高采收率的基础，高效的注水驱替效率和完善的不同阶段开发策略是高采收率的技术关键。区块高效开发的实践、开发过程采用的策略和方式对其他类似油田具有较好的借鉴价值。

关键词: 采收率, 储层特征, 驱替效率, 流场调整, 开发阶段

Abstract:

Most mature oilfields in eastern China, particularly medium and high permeability fault block reservoirs, have entered the high water-cut development stage. Enhancing oil recovery（EOR） in such reservoirs is crucial for stabilizing production and extending the economic development period of aging fields. The Chun-47 Block in the Dongying Sag of the Jiyang Depression is a medium and high permeability fault block reservoir. Adaptive well pattern design and differential adjustment strategies tailored to the reservoir characteristics during various development stages have enabled efficient exploitation, with a current recovery factor of 78.5% and an ultimate recovery factor of 84%. Analyzing the mechanisms underlying efficient development and identifying the field’s development patterns have academic and practical significance. This study examines the geological characteristics, reservoir macroscopic and microscopic features, fluid properties, and development strategies. Results highlight that favorable reservoir properties form the foundation for high recovery rates, while high waterflood displacement efficiency and comprehensive stage-specific development strategies serve as the key technical aids. The practical experience, strategies, and methods adopted for the efficient development of this block provide valuable insights for similar oilfields.

Key words: recovery rate, reservoir characteristics, displacement efficiency, flow field adjustment, development stages

中图分类号:

TE357

毛振强. 中高渗断块油藏提高采收率技术实践——以济阳坳陷东营凹陷纯47块为例[J]. 油气藏评价与开发, 2024, 14(6): 918-924.

MAO Zhenqiang. Technical practice of enhanced oil recovery in medium and high permeability fault block reservoirs: A case study of Chun-47 block in Dongying Sag of Jiyang Depression[J]. Petroleum Reservoir Evaluation and Development, 2024, 14(6): 918-924.

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