宝浪油田宝中区块注水开发过程中储层敏感性及其预防措施研究

Reservoir Sensitivity and Its Preventing Measures for Waterflooding in Baozhong Block of Baolang Oilfield

宝浪油田属于低孔低渗和低孔特低渗碎屑岩油藏,储层整体物性差,在注水开发过程中部分井出现注水越注越困难的现象。针对这一问题,室内试验评价了储层岩石的水敏性,系统分析了该区块注水井吸水能力差的原因,并针对性地研究出提高强水敏储层注水井吸水能力的预处理技术。该技术可降低注入水对储层的伤害,提高注水井吸水能力,保证油田正常注水。

Baolang Oilield belongs to a clastic rock reservoir with low porosity, low permeability and low porosity, ultra-low permeability, where the overall physical property of the reservoir is poor and some of the wells had the phenomenon that more water injection was conducted, more difficulty was created in the process of waterflooding. In consideration of the problem, water sensitivity of the reservoir rock is evaluated in laboratory experiments, the causes of poor water absorting in the injectors of the block are systematically analyzed, for the purpose of solving the problem, pretreatment techniques are developed for improving the water absorpting ability in strong water sensitivity reservoirs, by which the damage of injected water to the reservoirs can be reduced, the absorption ability to the injectors can be raised for ensuring the stable water injection in the oilfield.