渤海油田聚驱受效井液气交注复合深部解堵工艺

发布时间：2018-05-11 01:28

本文选题：聚合物驱 + 受效井　；参考：《石油钻采工艺》2017年03期

【摘要】：渤海油田注聚受效井堵塞物复杂,常规解堵工艺效果差。堵塞物组分分析表明,堵塞物以有机、无机及聚合物相互包覆的复杂形式存在,为此提出先采用有机溶剂清洗有机质,再对含聚胶团堵塞物进行分散,采用逐级剥离逐级解除的解堵思路。从溶解有机物、胶团降解及氧化破胶等3方面开展不同类型解堵液溶解效果对比实验,结合堵塞机理优选解堵液体系为8%~10%甲酸+4%~6%有机溶剂解堵剂D+1%强氧化剂。渤海油田注聚受效井堵塞半径可达3 m以上,为提高解堵效果及扩大解堵半径,通过对比分析堵塞物多轮次溶解效果,配套形成了多轮次处理及液气交替注入或伴注的解堵工艺。新工艺现场试验单井日增油达60 m3/d,应用效果显著,为解决聚驱受效井产能释放难题提供了新的思路,具有较好的现场推广价值。
[Abstract]:The plugging of polymer injection wells in Bohai Oilfield is complex and the conventional plugging removal process is not effective. The composition analysis shows that the clogging matter exists in the complex form of organic, inorganic and polymer covering each other. Therefore, organic solvent is used to clean organic matter first, and then to disperse the plugged matter containing polymicelles. The idea of removing plugging step by step is adopted. A comparative experiment was carried out from three aspects of dissolved organic matter, micelle degradation and oxidative gel breaking. Combined with the plugging mechanism, the optimal solution system was 810% formic acid 410% formic acid and 6% organic solvent remover D 1% strong oxidant. In Bohai Oilfield, the plugging radius of polymer injection effect well can reach more than 3 m. In order to improve the plugging removal effect and expand the plugging radius, the effect of multiple rounds dissolution of plugging material is analyzed by comparison and analysis. Multi-cycle treatment and liquid-gas alternately injection or injection were formed to remove the plugging process. The application effect of the new technology field test is 60 m3 / d, which provides a new way of thinking for solving the problem of productivity release of polymer flooding wells, and has a good value in field application.
【作者单位】：中海石油(中国)有限公司天津分公司渤海石油研究院采油工艺研究所;
【基金】：“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)
【分类号】：TE53

【参考文献】