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研究出了一种能使酸液有效地从含水层转向油层的新工艺 ,该工艺能提高油井基岩酸化成功率。由于受相对渗透率的影响 ,酸液主要进入高含水层 ,使水层得到改造 ,增加含水量。虽然能用泡沫将酸液从“含水层”转向损害层 ,但在一些区域不易生产 ,且需要附加的处理设备。一种新的不含颗粒和气体的材料已被研制出来 ,它可有效地使酸液从高含水层转向。当该材料与基岩中的水接触时 ,会形成高粘桥塞 ;当与地层基岩中的油接触时 ,该材料降解。本文将讨论转向技术细节和室内试验结果。在一个双岩心流动装置中进行的室内试验显示出 ,该材料使酸液从富水层到富油层及从高渗透层到低渗透层的转向很成功。
A new process has been developed that allows acid to be effectively diverted from aquifers to reservoirs, which increases the success rate of bedrock acidification. Due to the influence of relative permeability, the acid mainly enters the aquifer and the water layer is reformed to increase the water content. Although foam can be used to divert acid from the “aquifer” to the damaged layer, it is not easy to produce in some areas and requires additional processing equipment. A new particle-free and gas-based material has been developed that effectively diverts acid from a highly aquifer. When the material comes into contact with the water in the bedrock, a high viscosity bridging plug is formed; the material degrades when in contact with the oil in the bedrock. This article will discuss the shift to technical details and indoor test results. In-house tests conducted in a dual core flow device showed that the material succeeded in diverting the acid from the water rich to the oil rich and from the high permeability to the low permeability.