辽河曙光油田杜18井组,用木质素磺酸钠(重铬酸钠作交联剂)凝胶堵水,经一年多的试验后,至1985年9月,井组累计增产原油4265吨。从资料分析知,堵水后注水压力得以提高,改变了吸水剖面、出油剖面和平面水流方向,控制了油井含水上升速度,获经济效益25万元左右。 Liaohe Shuguang Oilfield Du 18 well group, with sodium lignosulfonate (sodium dichromate as cross-linking agent) gel plugging water, after more than a year of testing, to September 1985, the well group cumulative increase of 4265 tons of crude oil . According to the data analysis, the water injection pressure can be improved after the water plugging, changing the water absorption profile, the oil profile and the direction of the flat water flow, and controlling the water-bearing rising speed of the oil well. The economic benefit is about 250,000 yuan.