复杂断块油藏精细描述关键技术与应用

doi:10.13809/j.cnki.cn32-1825/te.2023.02.003

摘要/Abstract

摘要：

针对渤海湾盆地黄骅坳陷北部南堡凹陷冀东油田古近系复杂断块油藏地质条件复杂、断层多、断块小、主体油藏埋藏深，且受广泛发育火山岩屏蔽作用，地震资料品质差、地层对比与精细构造解释难度大、盆地面积小、物源近、沉积速率快、砂体叠置关系复杂的问题，为了能够有效识别井间砂体分布与连通关系、精细刻画构造形态，近年来冀东油田持续针对地质条件的“复杂”开展精细描述攻关，逐步形成了复杂断块油藏小层划分与精细对比、低级序断层识别、三角洲储层综合表征、注水开发过程中优势渗透通道形成与主控因素、复杂断块油藏三维地质建模、剩余油定量表征与分布规律6项关键技术。应用于5个典型区块，包括扇三角洲、辫状河三角洲2种储层沉积类型，中渗、低渗2类物性类型，中含水、高含水2个开发阶段，正常注水开发与整体压裂注水开发2种开发方式，为冀东油田复杂断块油藏合理开发奠定理论基础。

关键词: 精细油藏描述, 储层成因类型, 开发方式, 复杂断块, 古近系, 冀东油田

Abstract:

The geological conditions of the complex fault block reservoir in the Paleogene of Jidong Oilfield, Nanpu Sag, northern Huanghua Depression, Bohai Bay Basin are complex. There are many faults, small fault blocks, the main reservoir is deeply buried, and it is shielded by the widely developed volcanic rocks. Therefore, the quality of seismic data is poor, the stratigraphic correlation and fine structural interpretation are difficult, the basin area is small, the source is close, the deposition rate is fast, and the sand body superposition relationship is complex. In order to effectively identify the distribution and connectivity of inter-well sand bodies and finely characterize the structural morphology, fine description and research on the complexity geological conditions in Jidong Oilfield have continuously carried out in recent years. Six key technologies have been gradually formed, including small layer division and fine correlation of complex fault block reservoirs, low-order fault identification, comprehensive characterization of delta reservoirs, formation and main controlling factors of dominant permeability channels in the process of water injection development, three-dimensional geological modeling of complex fault block reservoirs, and quantitative characterization and distribution of remaining oil, which are applied to five typical blocks, including two types of reservoir genesis of fan delta and braided river delta, and two types of physical properties of medium permeability and low permeability. In the development stages of medium water cut and high water cut, normal water injection development and overall fracturing water injection development are the theoretical basis for the rational development of complex fault block reservoirs in Jidong Oilfield.

Key words: fine reservoir description, reservoir genetic type, development method, complex fault block, paleogene, Jidong Oilfield

中图分类号:

TE122

李国永. 复杂断块油藏精细描述关键技术与应用[J]. 油气藏评价与开发, 2023, 13(2): 152-162.

LI Guoyong. Key technology of fine description of complex fault block reservoir and its application[J]. Reservoir Evaluation and Development, 2023, 13(2): 152-162.

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