深水无固相水基隔热封隔液技术

周姗姗; 许明标; 由福昌; 陈侃; 宋建建

doi:10.3969/j.issn.1001-5620.2016.02.008

深水无固相水基隔热封隔液技术

doi: 10.3969/j.issn.1001-5620.2016.02.008

1.
长江大学石油工程学院, 武汉 430100
2. 荆州嘉华科技有限公司, 湖北荆州 434001

详细信息

作者简介:
周姗姗,1989年生,在读硕士研究生,主要从事钻完井液的研究。E-mail:zhoushanshan0712@163.com。

中图分类号: TE254
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出版历程
- 收稿日期: 2015-12-23
- 刊出日期: 2016-03-31

Solid-free Thermal Insulation Water Base Packer Fluid Technology for Deep Water Operation

1.
College of Petroleum Engineering, Yangtze University, Wuhan, Hubei 430100, China
2. JiahuaKeji, Jingzhou, Hubei 434001, China

摘要

摘要: 无固相水基隔热封隔液是指充填于油气井井下环空中起隔热作用的水基工作液,其主要作用是减少油气管道内的热量损失,防止油气管内出现析蜡,生成天然气水合物等现象,保障油气井的正常作业。主要通过室内实验方法,基于降低体系导热系数及控制环空自然对流减小井筒热量损失这一理论进行研究。优选出多元醇C4作为降低体系导热系数的试剂;优选出生物大分子MT作为流变调节剂,使体系在高剪切速率下具有低黏度特性以满足泵送要求,在低剪切速率下具有高黏度特性以减小环空自然对流所产生的热量损失;通过可溶性盐对体系进行密度调节,使其密度在0.9~1.2 g/cm³范围内可调,从而满足不同压力系数的油气藏。对新型的无固相水基隔热封隔液的性能评价结果表明:其具有导热系数低、隔热效果好、密度可调范围宽、长期热稳定性好等特点,同时与油基隔热封隔液、醇基隔热封隔液相比,研制的无固相水基隔热封隔液隔热效果好、配制成本低,无固相沉积,且可有效避免对环境造成污染。
- 无固相 /
- 水基隔热封隔液 /
- 传导率 /
- 环空对流 /
- 固相沉积
Abstract: Solid-free thermal insulation water base packer fluid is a water base fluid used in the annulus of oil and gas wells to minimize the heat loss in oil and gas pipes and thus inhibit waxing and formation of gas hydrate therein.Heat loss in oil and gas pipes can be achieved by reducing the coefficient of heat conductivity of the fluid flowing in the pipes,and by controlling the free convection taking place in the pipes.In laboratory studies,a polybasic alcohol,C4,is selected as a reagent to reduce the coefficient of heat conductivity.A biopolymer,MT,is chosen as a rheology modifier;it reduces the viscosity of the flowing fluid at high shearing rate,thus satisfying the needs for pumping the fluid.On the other hand,MT increases the viscosity the fluid at low shearing rate,thus minimizing the heat loss caused by free convection in the annulus.Using soluble salts,the density of the fluid flowing in the pipes can be adjusted between 0.9 g/cm³ and 1.2 g/cm³,thus satisfying the needs of reservoirs with different pressure coefficients.The studies reveal that the new solid-free thermal insulation water base packer fluid has low coefficient of heat conductivity,good thermal insulation performance,wide density range,and good stability over long period.Compared with oil base packer fluid and alcohol base packer fluid,this new packer fluid has better heat insulation performance and low preparation cost,and it is free of solids precipitation and poses no pollution to the environment.
- Solid free /
- Thermal insulation water base packer fluid /
- Conductivity /
- Annular convection /
- Solid precipitation

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参考文献(12)

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