三塘湖盆地牛东区块火山岩油藏储层保护技术

Reservoir Protection Technologies of Volcanic Reservoir in Block Niudong,Santanghu Basin

近年来,吐哈油田在三塘湖盆地连续发现了数个火山岩油气藏,牛东区块是其中第一个开发区块,其油藏特征与常规砂岩油藏存在很大差异,这就对储层保护技术提出了新的要求。针对牛东区块火山岩油藏储层特征,分析该油藏易受到伤害的类型,并对不同类型伤害所存在的潜在伤害因素进行分析和评价,结合室内敏感性试验评价和现场实际开发过程中所存在的问题,制定出针对性强的开发全过程的储层保护技术对策,形成一套适合牛东区块C2k火山岩油藏的储层保护系列技术,并取得了一定的应用效果。

Several special volcanic reservoirs have been discovered in Santanghu basin in Tuha oilfield in recent years. Niudong block is the first developed volcanic reservoir. Its reservoir characteristics differ from those of the conventional sandstone reservoir greatly. It raises new requirement for reservoir protection technique. The types of damages that the reservoir is subject to have been analyzed according to the reservoir characteristics of C2k volcanic reservoir; simultaneously the potential damage element from different damage types have also been analyzed and estimated. Combined the in-house sensitivity experiment evaluation and the problems encountered in the field production, the reservoir protection technology countermeasure that has strong pertinence and can be applied for the whole process of development has been developed and a series of reservoir protection technologies adaptable to C2k volcanic reservoir in block Niudong have been formed and have taken a certain application effect.