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油藏天然裂缝发育及局部高渗带的存在,导致裂缝主向或高渗带方向油井含水上升快,侧向油井见效程度低,水驱波及系数小,影响油田开发效果。为了进一步改善水驱开发效果,提高原油采收率,在对长6储层地质特征及水驱渗流规律深入认识的基础上,开展了以注水井深部调剖为治理手段的工艺技术措施。通过矿场试验,进行了施工排量、施工压力、堵剂用量、段塞设计等施工参数优化设计,明确了堵水时机及选井原则,形成了适合安塞油田裂缝性油藏注水井深部调剖工艺技术体系,取得了一定的开发效益和经济效益,为安塞油田裂缝储藏高效开发提供了有利的技术支撑。
The natural fractures in the reservoir and the existence of the local hyperosmotic zone lead to the rapid rise of the well in the direction of the main fracture or the direction of the high permeability, the low efficiency of lateral wells and the small coefficient of water flooding, which affects the development effect of the oilfield. In order to further improve the development effect of waterflooding and oil recovery, based on the deep understanding of Geological characteristics of Chang 6 reservoir and the law of water flooding seepage, the technological measures of deep profile control of water injection wells are taken as the treatment measures. Through the field test, the optimal design of construction parameters such as construction displacement, construction pressure, dosage of plugging agent, slug design and so on has been carried out. The timing of water shutoff and well selection have been clarified, and a deep well for the fractured reservoirs in Ansai Oilfield has been formed Profile control technology system, has made some development benefits and economic benefits for the Ansai Oilfield crack storage and efficient development provides a favorable technical support.