Abstract:

To solve the problems of reducing plug removal effect and lower effective period in Bohai Sea oilfield, strategy by expanding plug removal radius, optimizing plug removal agent system to enhance plug removal effect is considered. Through process research and optimization, a new deep penetration plug removal technology has been figured out. Deep penetration plugging removal technology mainly includes three process, including matrix plugging removal, fracture reduction and deep reservoir plugging removal. The mechanism of deep penetration plugging removal technology is studied forming a set of applicable technology. In view of the plugging problem in polymer injection wells in Jinzhou oilfield, a composite plugging remover was optimized, based on the results of polymer solution viscosity reduction, simulation of polymer?containing plugging material, and actual degradation of polymer?containing plugging material. Construction program was formed by considering the process program, and applied in the field. The effect of increasing liquid and oil is improved .

Key words: Deep penetration, Oil weel plugging, Fracturing fracture, Delolymerizing agent

摘要：

针对渤海油田油井解堵效果变差、有效期降低等问题，提出了扩大解堵半径、优选解堵剂体系、强化解堵效果的解堵思路。通过工艺研究、工艺优选，形成了深穿透解堵技术。深穿透解堵技术主要包含基质解堵、降阻造缝和储层深部解堵三个过程。对深穿透解堵工艺机理进行了研究，并形成了一套现场可应用的工艺技术。针对锦州油田注聚井区堵塞问题，从聚合物溶液降黏、模拟含聚堵塞物、现场含聚堵塞物降解三个方面优选出一种复合解堵剂，结合工艺思路形成施工方案，并进行现场应用，取得了较好的增液、增油效果。

关键词: 深穿透, 油井堵塞, 压裂裂缝, 解聚剂