石油钻采工艺2017，Vol.39Issue(3)：375-381,7.DOI:10.13639/j.odpt.2017.03.022
渤海油田聚驱受效井液气交注复合深部解堵工艺
In-depth combined blockage removing technology with liquid alternating gas injection for polymer flooding response wells in Bohai Oilfield
摘要
Abstract
The blockage in polymer flooding response wells in Bohai Oilfield is complicated, so the conventional blockage remov-ing technologies don't work well. In this paper, the compositions of blockage were analyzed. It is shown that the blockage is existed in the complex form with organic matters, inorganic matters and polymer coating with each other. Therefore, it was proposed to adopt the concept of blockage stripping and removing step by step, i.e., cleaning the organic matters using organic solvent firstly and then dispers-ing the micelle bearing blockage. Contrast experiments were carried out on the blockage removing results of various blockage removers from three aspects, i.e., organic matter dissolution, micelle degradation and gel oxidizing and breaking. The blockage remover system selected according to the blockage removing mechanism is composed of 8%-10% methanoic acid + 4%-6% organic blockage remover D+1% strong oxidizer. The block radius of polymer flooding response wells in Bohai Oilfield is over 3 m. To improve the blockage re-moving effects and expand blockage removing radius, polycyclic blockage dissolution effects were compared and analyzed. And conse-quently, the blockage removing technology of polycyclic treatment and liquid alternating gas injection or accompanied injection was de-veloped. This new technology was tested on site, and its application effect is remarkable with single-well daily oil increment of 60 m3/d. It provides the new idea for solving the productivity difficulty of polymer flooding response well. And it is worth popularizing in field.关键词
聚合物驱/受效井/堵塞机理/深部解堵/解堵液体系/多轮次注入/液气交替注入Key words
polymer flooding/response well/blocking mechanism/in-depth blockage removing/blockage remover system/poly-cyclic injection/liquid alternating gas injection分类
能源科技引用本文复制引用
高尚,张璐,刘义刚,刘长龙,孟祥海,邹剑..渤海油田聚驱受效井液气交注复合深部解堵工艺[J].石油钻采工艺,2017,39(3):375-381,7.基金项目
"十三五"国家科技重大专项"渤海油田高效开发示范工程"(编号:2016ZX05058). （编号:2016ZX05058）
