塔河油田X区块奥陶系沥青质油井防堵技术研究

Prevention of asphaltene chokes in Ordovician oil production wells, district X, Tahe oil field

黄梁帅 犹佳雨 李丹丹

Huang Liangshuai You Jiayu Li Dandan

中国石化 西北油田分公司 采油一厂开发研究所, 新疆 轮台 841600

No. 1 Oil Production Plant, SINOPEC Northwest Company, Luntai, Xinjiang 841600, China

塔河油田X片区奥陶系区块油井陆续出现沥青质堵物堵塞油管、生产管线，造成油井停产，对生产造成了严重影响。针对此类问题，对塔河油田X片区奥陶系原油中沥青质的沉积问题进行了综合研究，得到了有效的油井沥青质防堵生产技术。通过对塔河油田X区块奥陶系原油组分、沥青质沉积堵塞物的分析，发现沥青质沉积主要是由于原油组分中饱和烃含量高，胶质沥青质之比过低，由此发展了沥青分散剂解堵、排出段塞堵物、井口流程优化等治堵工艺。通过试验发现，这些工艺较好地解决了沥青质沉积堵塞油井及管线的问题。

Nowadays, some Ordovician oil production wells are shut down because of asphaltene chokes in oil pipes and surface pipeline system, which has seriously affected production progresses. In order to solve this problem, we have conducted a comprehensive study on asphaltene deposition and finally obtained an effective method for asphaltene choke prevention in oil production wells. Through the study of crude oil components and asphaltene deposition in district X, we found that high content of saturated hydrocarbons and low colloid asphaltene ratio are the main causes leading to asphaltene deposition. According to these studies, we have developed some methods to prevent asphaltene chokes including mixing in asphalt dispersant, clearing slug away and optimizing ground processes. These methods have effectively solved the problems after experiments.

https://doi.org/10.11781/sysydz2016S1052