摘要
丘陵油田经多年注水开发,目前已进入中高期含水阶段。受注入水影响,储层形成多压力系统。由于低矿化度注入水的影响,水淹层的扩散吸附电位发生不同程度变异;因加密调整井泥浆密度较高,过滤电位对自然电位的影响不能忽略。过滤电位和变异的扩散吸附电位叠加造成自然电位异常,会影响储层解释结果的正确性。统计所有自然电位异常层的试油情况,分析试油结果与测井响应特征关系,提出判别自然电位异常储层性质的方法。
Qiuling oilfield has entered into high water-cut stage after many years＇ waterflooding.Affected by the injection water,multi-pressure system has been formed in the reservoir formation.Due to influence of low-salinity injected water,variation of diffusion and adsorption potential of different levels occurred in water flooded layer;due to high density mud of adjustment wells,the effect of electrofiltration potential on natural potential should not be neglected.Abnormal natural potential caused by superposition of electrofiltration potential and adsorption potential variation can affect the accuracy of reservoir interpretation results.The method for determining reservoir property with abnormal natural potential is presented by counting oil testing of all abnormal layers of natural potential and analyzing the relationship between oil testing results and log response characteristics.
出处
《吐哈油气》
2011年第1期40-42,48,共4页
Tuha Oil & Gas
关键词
丘陵油田
自然电位
试油
Qiuling oilfield
natural potential
oil testing
