风化店火山岩油藏开发效果分析研究

通过对风化店火山岩油藏开发效果分析：在火山喷出岩油藏中,储集体受多期火山喷发影响,岩性空间展布变化频繁,加之后期地表风化改造和构造断裂活动,更加剧了储集空间的复杂程度.因此,多变的火山岩相带和复杂储集空间非均质性,是影响油藏注水开发效果的主要因素.火山岩体中的成岩缝、构造裂缝的不均匀分布和明显的展布方向性是油藏底水上窜和注入水快速渗流的有利通道,也是导致油藏开发过程中无水开采期短、综合含水上升快、采出程度差的重要原因.针对火山喷出岩油藏的储集特征,在注水开发中,制定合理的采油速度、生产压差和控制油层打开程度,是提高火山岩油藏开发效果的前提和保证.

ANALYSIS AND RESEARCH ON DEVELOPMENT RESULT OF VOLCANIC OIL ACCUMULATION IN FENGHUADIAN AREA

Through comprehensive analysis on development of volcanic oil accumulation in Fenghuadian area,it was concluded that the volcanic reservoirs were increasingly complicated maily by four factors.1.the effect of multistage volcamic eruption on the reservoir,2.frequent variation of lithology in space;3.reorganization rsulted from subesquent surface weathering and the last is structural fracturc.it is obvious that the inhomogeneity of variable volcanic facies belt and complex reservoir space that have had a great effect on water injection responses.On the other hand,the uneven distribution and certain spreading direction of diageneic fractrue and structural fracture not only formed the passage for bottom water and injected water but also was the main factor that has shorten the dry-out production,accelerated the rise of composite water cut and lowered the rate of production.According to the reservoir characters mentioned above.We believed that rational rate of oil, production producing pressure drop and reservoir penetration would be quite important in improring the reservoirs' development effectiveness during the process of water injection.