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近年来由于部署目标储量品位在不断降低,直井开发经济效益较差,必须采用水平井、复杂结构井等新技术才能开发动用这类储量,而在水平井钻井、完井施工中,钻井液和完井液的长时间的侵泡会直接造成水平井的储层损害从而影响油井试油及生产效果。因此降低油气层损害是保护油气层系统工程的第一个工程环节。本文对钻井完井过程中油气层损害原因以及相应的油气层保护技术特点进行了简单的总结。
In recent years, due to the continuous reduction of the target volume of deployment and the poor economic benefits of vertical well development, such new technologies as horizontal wells and complex structural wells have to be developed and utilized. However, in horizontal well drilling and completion construction, drilling fluid and A long time of completion fluid invasion will directly cause horizontal well reservoir damage and thus affect the well test oil and production. Therefore, reducing oil and gas layer damage is the first engineering part to protect the system of oil and gas reservoirs. This paper briefly summarizes the reasons for the damage of oil and gas layers and the corresponding technical features of oil and gas reservoirs during drilling and completion.