油井压裂作业是油井增产的主要措施。
The fracturing of oil well is a main measure to improve the oil production.
油井压裂选井选层是一项复杂有难度的技术。
The selection of wells or layers for fracturing is an intricate task.
油井压裂时加入各类助剂，以达到较好的增产目的。
The various types of additives are added to fracturing in order to achieve the purpose of better yield.
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