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高渗砂岩储集层孔喉尺寸分布范围广、连通性好、产能贡献值大,这些特点在实施作业中提高了暂堵难度,大漏失产生后造成敏感储集层污染。本文从暂堵剂选择、入井液性能方面进行了研究,开发出一种易于返排、适用大漏失井暂堵的修井液体系,有效解决了大漏失井修井过程储层保护问题。
The pore-throat size of the hypertonic sandstone reservoir is characterized by a wide range of pore-throat size distribution, good connectivity and large contribution to productivity. These features increase the difficulty of temporary plugging in operation and lead to pollution of sensitive reservoirs after large leakages. In this paper, the research on the selection of temporary plugging agent and the performance of fluid into the well has been carried out. A well repairing fluid system which is easy to return flow and is suitable for temporary plugging of a large leakage well is developed, which effectively solves the problem of reservoirs protection during workover.