关键词: 致密低渗, 应力敏感, 废弃压力, 采收率, 苏里格气田

Abstract:

According to the analysis of core, conventional log and formation micro-resistivity scan, the four properties (lithologic characteristic, physical property, oiliness and electrical property) characteristics and the relationships among them of JZ25-1S buried hill metamorphic reservoir in Liaodong Bay are studied based on the theory and method of lithology, reservoir geology and well-logging geology. The lithology of JZ25-1S ribbons with dominated gneiss and cataclasite and partlymetamorphosed granite. Cataclasite and metamorphosed granite have good oil-bearing probability, while gneiss is poor. The laboratory test reveals that reservoir properties of JZ25-1S buried hill are relatively good, but still very heterogeneous. The favorable reservoirs are characterized by obvious positive separation in dual lateral log, high in acoustic log and neutron log and low in density log. The thickness of the favorable metamorphic reservoirs in JZ25-1S buried hill is thin in the west and thick in the east. This comprehensively study of the four properties characteristics of JZ25-1S buried hill metamorphic reservoir is favorable for exploration activity in this area.

Key words: lowpermeability, stress-sensitivity, abandonment pressure, oil recovery, Sulige Gasfield