裂缝孔隙介质储层产能确定方法

Method to determine flow potential in fracture pore media reservoir

碳酸岩油藏、火山岩油藏的储层大多为洞穴型、孔洞型、裂缝型、裂缝孔洞型储层,如塔里木奥陶系碳酸岩油藏、克拉玛依石炭系火山油藏等。这类油藏储层非均质性强,储层一般为块状分布,油井产能确定困难。为此以油井控制面积为基础,将控制范围内储层分为裂缝储集和孔隙溶洞储集2个储集系统,建立产能计算的双渗流模型,由此分析计算产能。通过5口井实例计算,与实际生产符合很好。裂缝储集的范围、裂缝参数等由测井等方法建立裂缝参数确定。

： The reservoir beds of carbonatite oil reservoir and volcanics oil reservoir mostly belong to the types of cavity, cavern type, fracture and fracture cavern, such as the Ordovician carbonatite reservoir in Tarim, Carboniferous volcanics reservoir in Karamay. These types of reservoir beds, with serious heterogeneity, generally distribute massively, and it is very difficult to determine the oil well productivity. In this paper, based on the oil wells area of influence, the reservoir beds in the control range are divided into 2 accumulation systems： accumulation in fractures and accumulation in pore cave. The dual filtering flow model is established to analyze and calculate the productivity. The range of the accumulation in fractures and fracture parameters are determined based on logging.