下寺湾油田长2储层敏感性及注水可行性分析

摘要

By studying the basic character of Xiasiwan oilfield chang-2 reservoirs,evaluation and analysis of the reservoir rock sensitivity.The results show that acid sensitivity is medium,velocity,salt,alkali sensitivity are weak,water sensitivity is weaker than medium.The chlorite content is relatively high in the clay minerals,so it is possible occur acid sensitivity and not suitable for transform of acidification.Chang-2 reservoir is low porosity and low permeability,the lack of natural energy and seriousness of formation deficit.To solve the above problem and restore the formation energy.In papers Xiasiwan oilfield chang-2 reservoirs conduct analysis and research of water injection development and demonstrated its feasibility,by implement and effect of water injection development,ultimately improving the recovery ratio and development benefit.%通过下寺湾油田长2储层基本性质的研究,储层岩石的敏感性评价分析,得出该区具有弱速敏、中等偏弱水敏、弱盐敏、中等酸敏和弱碱敏等储层敏感性。粘土矿物中绿泥石含量相对较高,该区储层发生酸敏的可能性较大,不适合酸化改造。长2油藏是低孔、低渗油藏,天然能量不足,地层亏空严重。针对以上问题,为了恢复地层能量,本文对下寺湾油田长2油藏进行了注水开发的分析研究,论证了注水开发的可行性,通过注水开发的实施及效果观察,最终达到提高该油田的采收率与开发效益。