水处理残渣调剖剂室内研究及现场应用

侯天江; 赵化廷; 李宗田; 赵普春; 肖利平

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水处理残渣调剖剂室内研究及现场应用

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A large amount of residue from the water treatment process has gradually accumulated and thus caused serious environmental pollution in waterflood oilfields. The water treatment residue is a grey suspension, with a density of 1.08 g/cm3, and mainly contains over 65% of light CaCO3, MgCO3, CaSO4, Fe2S3 and Ca(OH)2. This paper ascertains the effect of water treatment residue on core permeability and its application in oilfields. Coreflooding tests in laboratory were conducted in two artificial cores and one natural core. Core changes were evaluated by cast model image analysis, mercury injection method and scanning electron microscopy (SEM). Fresh water was injected into another natural core, which was plugged with water treatment residue, to determine the effective life.The results indicate that the water treatment residue has a strongly plugging capability, a resistance to erosion and a long effective life, and thus it can be used as a cheap raw material for profile control.In the past 8 years, a total of 60,164 m3 of water treatment residue has been used for profile control of 151 well treatments, with a success ratio of 98% and an effective ratio of 83.2%. In the field tests, the profile control agent increased both starting pressure and injection pressure of injectors, and decreased the apparent water injectivity coefficient, significantly improving intake profiles and lengthening average service life of injectors. 28,381 tons of additional oil were recovered from these corresponding oil wells, with economic benefits of ￥3,069.55×104 (RMB) and a remarkable input-output ratio of 8.6:1.

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来源
《石油科学（英文版）》 |2005年第4期|50-55|共6页
作者
侯天江; 赵化廷; 李宗田; 赵普春; 肖利平;
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作者单位

Petroleum Engineering Department of Zhongyuan Petroleum Exploration Bureau, SINOPEC,Puyang, Henan 730001, China;

The Third Production Factory, Zhongyuan Petroleum Exploration Bureau, SINOPEC,Shenxian, Shandong 252435, China;

Petroleum Engineering Department of Zhongyuan Petroleum Exploration Bureau, SINOPEC,Puyang, Henan 730001, China;

The Third Production Factory, Zhongyuan Petroleum Exploration Bureau, SINOPEC,Shenxian, Shandong 252435, China;

The Third Production Factory, Zhongyuan Petroleum Exploration Bureau, SINOPEC,Shenxian, Shandong 252435, China;

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原文格式 PDF
正文语种 chi
中图分类油气田建设工程;
关键词
Water treatment residue; coreflooding test; profile control agent; permeability modification; field application;

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4. 油田水处理污泥改性调剖实验与现场应用 [J] . 杨联系 ,李秀存 ,丁小峰 . 内蒙古石油化工 . 2010,第010期
5. PI—8203调剖剂的调剖效果室内岩心评价 [J] . 吴凤芝 ,俞建望 ,韩成林 . 东北石油大学学报 . 1988,第004期
6. 水处理残渣石灰泥调剖剂室内研究及现场应用 [C] . 赵普春 . 中国石油学会高成熟油田改善开发效果学术研讨会 . 1997
7. 低渗透油田驱油/调剖体系的调驱机理及现场应用技术研究 [A] . 谭俊领 . 2018

水处理残渣调剖剂室内研究及现场应用

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