关键词: 苏德尔特油田, 兴安岭油层, 微观孔隙结构, 孔隙, 喉道

Abstract:

Research on characteristics of pore structure of Xing anling pay zone in Suderte oilfield is made, in view of the problems of poor effect of waterflooding and the low productivity. The reasonable classification criteria of throat is determined. Classification limit between fine throat and absorbing throat is 0.1μm. The research is based on pore distribution feature, throat size, throat distribution range and its form, permeability contribution, storage space and fluid flowing channel, flowing throat limit, Jamin effect, movable fluid saturation. There are big differences in the throat size and the distribution. Throat distribution takes on dual peak, and microheterogeneity is very serious. Formation permeability is controlled by throat. Permeability contribution takes on single peak and peak value locates right site. Large scale throat contribute much to permeability. The fundamental reason of waterflooding and the low productivity in Xing anling pay zone is that throat is small, flowing throat limit is low, storage space does not match flowing space, Jamin effect is large, and movable fluid saturation is small. Infilling oil well, method in the center of square well pattern is proposed and the better development result is obtained.

Key words: Suderte oilfield, Xinganling pay zone, pore structure, pore, throat