渤海古近系复杂断块油藏潜力识别技术研究

走滑断裂控制下的古近系复杂断块油藏潜力识别一直是海上油气田开发的难点,亟待深入开展研究。以渤海古近系W油田东块沙河街组为例,针对总体储量探明程度低、分布较零散、评价难度较大的特点,利用压力资料分析、成熟区类比分析及相邻断块油柱高度类比分析方法开展了古近系走滑断裂系统控制下复杂断块油藏潜力分析及判别挖潜技术研究。通过技术模式创新及实践,在W油田相继成功评价落实了2个成熟区潜力层位和3个相邻潜力断块,升级和新增探明石油地质储量近600万方,其理论性和实用性可为渤海类似复杂断块油田开发提供指导和借鉴。

The Potential Discrimination Research and Practiceon Complex Fault Block Reservoir in Paleogene of Bohai

The potential identification of the complex fault block reservoir under the control of strike slip fault has been a difficult problem in the field of offshore oil and gas field development. Taking of east block of Shahejie group in W oilfield of Paleogene in Bohai area as an example, the proven degree of overall reserves is low, the distribution is fragmented and it''s hard to evaluate the overall reserves. By using pressure data analysis, maturation zone analogy analysis and adjacent fault block oil column height analogy analysis method, the research of complex fault block oil reservoir potential analysis and discriminant potential tapping under control of the Paleogene strike-slip fault system is carried out. Through the mode of technological innovation and practice, it has been successfully implemented in the evaluation of 2 potential horizons and 3 adjacent potential fault blocks of W oilfield, which increased nearly 6 million cubic meters of proven reserves, the theory and practicability of this kind of development mode is a good reference for the development of similar complex fault block reservoir in Bohai Oilfeild.