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根据塔河油田奥陶系碳酸盐岩油藏6口典型井的生产特征,研究了不同部位油井的产水特征,认为有4种:自然投产即见水型、酸压投产即见水型、自然投产一段时间见水型、酸压投产一段时间见水型。就油井所在不同部位(缝、洞或缝-洞组合)对单井产水特征的影响进行了分析,认为油井所处部位不同,对产水特征的影响不同:位于缝部位的油井主要特征是缝产水;钻遇溶洞的油井主要特征是洞产水;对既钻遇溶洞、在裸眼段又发育天然裂缝的油井,其产水特征为缝-洞组合型。缝产水含水率上升快而洞产水含水率上升稳定且有无水采油期。
According to the production characteristics of six typical wells in Ordovician carbonate reservoirs in Tahe Oilfield, the water production characteristics of oil wells in different parts are studied. There are four types of production wells: , Naturally put into operation for a period of time to see water, acid pressure put into operation for some time to see water. The impact of different locations of the oil well (seam, hole or seam-hole combination) on single-well water production characteristics is analyzed. It is concluded that different locations of the oil well have different impacts on the water production characteristics. The main features of the oil well located at the seam site are The main characteristic of the oil well drilled in the cave is the production of water in the hole. For the oil well that encounters both karst cave and natural crack in the naked eye section, the water producing characteristic of the well is seam-hole combination type. Moisture in the production of water rises quickly and the water content of the cavernous water rises steadily and there is an anhydrous oil recovery period.