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鄂尔多斯盆地王渠则区侏罗系延安组延9油层组为研究对象,在油藏地质条件研究、精细储层描述及油藏开发中存在的问题研究基础上,通过注水开发适应性、注水方式和注水时机的分析,对延9幵油藏进行了注水发部署,以期提高油藏最终采收率。研究认为:王渠则区延9油藏自然能量较低,天然能量采收率不到13%,而理论计算水驱采收率为30%左右,明显优于采用天然能量开采。同时该区储层连通性较好及中等酸敏、弱或无速敏、中等水敏,有利于注水进入地层。本次方案共新部署采油井32口,注水井5口,转注采油井23口。
Based on the study of reservoir geological conditions, the description of fine reservoirs and the existing problems in reservoir development, the Yan 9 reservoir of Yan’an Formation of Yanjian Formation in Wangquzei District, Ordos Basin, is studied by adapting waterflooding method And the timing of waterflooding, a waterflooding deployment was carried out on the Yan 9 reservoir to improve the ultimate recovery of the reservoir. The study shows that the natural energy recovery of Yan 9 reservoirs in Wangqu Zaidian area is lower than 13%, while the theoretical waterflood recovery is about 30%, which is obviously better than the natural energy recovery. At the same time, the reservoirs in this area have good connectivity and moderate acid sensitivity, weak or no speed sensitivity, moderate water sensitivity, which is good for water injection into the formation. A total of 32 new production wells, 5 water injection wells and 23 oil production wells have been deployed.