新型高密度清洁复合盐水完井液

吴若宁; 熊汉桥; 岳超先; 朱杰; 孙运昌; 王启任

doi:10.3969/j.issn.1001-5620.2018.02.023

新型高密度清洁复合盐水完井液

doi: 10.3969/j.issn.1001-5620.2018.02.023

西南石油大学石油与天然气工程学院, 成都 610500

详细信息

作者简介:
吴若宁,在读硕士研究生,1993年生,研究方向为油气层保护技术。电话18702815069;E-mail:1047215020@qq.com。

中图分类号: TE257.6
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出版历程
- 收稿日期: 2017-12-05
- 刊出日期: 2018-03-30

A New High Density Solid-free Clear Saltwater Completion Fluid

School of Oil & Natural Gas Engineering, Southwest Petroleum University, Chengdu Sichuan 610500

摘要

摘要: 为了研究一种价格低廉的新型高密度清洁复合盐水完井液，对常见的无机盐氯化钙和氯化锌使用增溶剂，提高其在水中的溶解量，来达到在不增加完井液固相含量的同时提高完井液密度的目的。通过室内实验筛选出2种增溶剂，得出2种增溶剂在2% LAS-30+2% SLF-4的用量下增溶效果最好，在该用量下2种无机盐复配后所配制的清洁盐水体系的最大密度可以达到1.926 g/cm³，此时氯化钙的溶解量为160 g/100 mL水，氯化锌的溶解量为98 g/100 mL水。新型完井液的表观黏度为33 mPa·s，抗温可达140℃，渗透率恢复值高达96%，保护储层性能良好。
- 无固相清洁盐水完井液 /
- 高密度 /
- 抗高温 /
- 防止储层损害 /
- 增溶剂
Abstract: In laboratory studies, solubilizing agent was used to increase the solubility of commonly used inorganic salts such as CaCl₂ and ZnCl₂ to formulate a new cost-efficient high density solid-free clear saltwater completion fluid. The addition of inorganic salts in a completion fluid increases the density of the fluid while not increasing its solids content. Two solubilizing agents were selected through laboratory experiments, which performed best in a solution containing 2%LAS-30+2%SLF-4. A clear saltwater completion fluid prepared with the said solution can have density of 1.926 g/cm³ with compounded inorganic salts. At this density, the concentration of CaCl₂ is 160 g/100 mL water, and the concentration of ZnCl₂ is 98 g/100 mL water. The new completion fluid has apparent viscosity of 33 mPa s, temperature tolerance of 140℃, and recovery of damaged permeability as high as 96%. This completion fluid performed very well in reservoir protection.
- Solid-free clear saltwater completion fluid /
- High density /
- High temperature resistant /
- Prevent reservoir damage /
- Solubilizing agent

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参考文献(14)

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