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安塞油田杏河西部初期采用超前注水方式开发,受储层非均质性及后期开发改造等诸多因素影响,开发后部分采油井表现为快速见水特点,并且呈现多方向性见水特征。近两年在加大区块渗流及储层认识的基础上,在该区域开展注水井深部化学调剖措施,通过封堵高渗带或微裂缝,以改善水驱剖面,扩大注入水波及体积,达到稳油控水及提高阶段采收率的目的。本文主要结合区块储层特征、投产投注方式以及储层后期改造等方面,在单井、井组化学调剖试验的基础上,对该政策的适应性进行初步探讨及评价,为杏河西部区块后期改善开发效果提供依据。
The early Xinghe oilfield in the western part of the Ansai Oilfield was developed by means of advanced waterflooding. Influenced by many factors such as reservoir heterogeneity and post-development and reconstruction, some oil wells after development were characterized by rapid seepage and water diversification. In the recent two years, based on the increase of block seepage and reservoir understanding, deep chemical profile control measures have been carried out in this area. By plugging the high permeability zone or micro-cracks, the waterflooding profile can be improved and the injection water volume and volume can be expanded , To stabilize the water and improve the stage of oil recovery purposes. In this paper, based on the characteristics of block reservoirs, production and betting methods, and late reservoir modification, based on the single well and well group chemical profile testing, the adaptability of the policy is discussed and evaluated as the western part of Xinghe The latter part of the block to improve development results provide the basis.