变质岩潜山油藏储层特征及高效开发建议

Metamorphic rock buried hill reservoir characteristics and suggestions on high efficiency development

渤海JZ25-1S油田太古界潜山油藏是1个孔、缝十分发育的变质岩似层状底水油藏,其地质结构极其复杂,具有裂缝空间发育规律差异大、潜山内幕裂缝发育段的连通模式不明确、优质储层变化大、非均质性极强、连续性及可对比性差等特点。结合JZ25-1S潜山油藏高产井的特点,从岩性、构造裂缝发育及井型等因素出发,分析潜山油藏产能的主控因素,提出潜山油藏高效开发建议,为后续潜山油藏的开发提供了一定的借鉴。

The Archean buried hill reservoir in Bohai JZ25-1S oilfield is a metamorphic rock,quasi-lamellar reservoir with bottom water and well developed pores and crevices. The reservoir has extremely complex geologic structure,is characterized by big differences in spatial development of fractures,unknown interconnection of fractures inside the buried hill,drastic change of high quality reservoir,severe heterogeneity,and poor continuity and comparability. Based on the features of high production wells in the JZ25-1S buried hill reservoir as well as lithology,tectoclase development,well type and other factors,this paper analyzes the control factors on buried hill reservoir deliverability,proposes suggestions on efficient reservoir development,and provides certain reference for subsequent development of buried hill reservoir.