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油井免修期是体现油田开发和管理水平的一项重要指标。2012年,玉门油田油井免修期仅为507天,免修期短大大制约了原油产量,也给控制生产成本带来了巨大压力。分析其原因,发现油井结蜡是影响免修期短的主要原因。玉门油田已开发70多年,油藏地质条件复杂,原油物性变化较大,前期使用的清防蜡技术已不能满足现场需要。为了提高现场清防蜡效果,延长油井免修期,针对不同区块、不同原油性质研制出的新型水基清防蜡剂,经在老君庙和鸭儿峡油田试验,取得良好的效果。
Oil well repair period is an important indicator of the level of oilfield development and management. In 2012, the Yumen oilfield oil-well exemption period was only 507 days. The short maintenance-free period greatly constrained the crude oil production and brought tremendous pressure to control the production cost. Analysis of the reasons, found that oil well waxing is the main reason for the short duration of the exemption. Yumen Oilfield has been developed for more than 70 years, the geological conditions of the reservoir are complicated and the physical properties of the crude oil vary greatly. The antifade wax technology used in the early stage can no longer meet the needs of the site. In order to improve on-site waxing-prevention effect and prolong the oil-free period, a new water-based paraffin inhibitor developed for different blocks and different crude oil properties has achieved good results after being tested in Laojunmiao and Yaierxia Oilfields.