胡尖山油田侏罗系油藏剩余油分布规律初认识

Preliminary Understanding of Remaining Oil Distribution in the Jurassic Oil Reservoir of Hujianshan Oilfield

胡151延9油藏目前处于高含水期,采出程度低,剩余地质储量大,油水运动规律复杂,剩余油认识不清。为认识剩余油分布,应用油藏数值模拟技术,以动态资料及动态分析为依据,紧密结合油藏工程,找出剩余油主控因素,总结剩余油富集特征,为后期油藏调整挖潜奠定基础,同时为同类型油藏剩余油研究提供技术思路。结合数值模拟技术和油藏工程方法,清晰认识胡151剩余油分布特征,确定剩余油富集区,降低油藏挖潜风险;胡151油藏剩余油主控因素为井网、边底水、构造形态等。指出胡151油藏剩余油主要富集区为压力平衡区域、构造高点及正向微构造部位、水下分流河道分岔部位、底水锥进区域、地层物性改变区域,为后期挖潜指明方向。

Yan 9 layer of Hu 151 reservoir is in the high water cut stage at present, the recovery degree is low, the remaining geological reserves is big, the oil/water movement rule is complex, and the remaining oil distribution is not clear. In order to understand the remain- ing oil distribution, the main control factors of remaining oil are found out and the characteristics of the remaining oil enrichment are smnmarized based on dynamic data and dynamic analysis using numerical reservoir sinmlation technology and the reservoir engineering, to provide a foundation for tapping reservoir potential and the technical ideas for the research of remaining oil in the same type of reser- voir. The remaining oil distribution characteristics of Hu 151 are clearly understood, and the remaining oil enrichment areas are deter- mined using numerical simulation technology and reservoir engineering method to reduce the risk of tapping the reservoir potential. The main controlling factors of the remaining oil in Hu 151 reservoir are well pattern, edge and bottom water and structure. It is pointed that the remaining oil enrichment regions of Hu 151 reservoir are in pressure balanced areas, structural high parts, positive micro structural parts, the bifurcation part of underwater channel, bottom water coning region and the change areas of formation physical property, which provides a direction for tapping remaining oil later.