渤海海域低密度早强水泥浆的室内研究  

Laboratory Study on Low Density Early Strength Cement Slurry Used in Offshore Bohai

作　　者：孙晓杰[1] 张维滨[1] 李建华[1] 滕兆健 李宗要 马永乐[1] 

机构地区：[1]天津中油渤星工程科技有限公司

出　　处：《钻井液与完井液》2014年第3期72-74,101,共3页Drilling Fluid & Completion Fluid

基　　金："渤海海域深水固井技术研究"(BX-G-12-05)部分研究内容

摘　　要：渤海海域是华北含油气盆地的重要组成部分,在渤海海域固井过程中,尤其是导管、表层套管固井时,由于温度低,破裂压力低,水泥浆稠化时间长,容易增加环空窜流及漏失的风险,使钻井成本升高。因此,基于颗粒级配原理,依据分形理论,研制出了新的减轻增强材料S1,配以适当的油井水泥外加剂,优选出了密度为1.4 g/cm3的水泥浆。室内研究表明,该水泥浆早期强度发展快,30℃下,24 h抗压强度大于10 MPa,静胶凝过渡时间小于60 min,API失水量小于60 mL,游离液含量为0。该水泥浆稳定,混配容易,可以满足渤海海域固井的需要。Low formation temperature, low fracturing pressure and long thickening time of cement slurry have resulted in difficulties in cementing the surface section of the hole such as channeling in annulus and loss of cement slurry, leading to high operation cost. A new light weight agent, S1, is developed based on the fractal theory of particle sizing, to mix a cement slurry of 1.4 g/cm3 with other cement additives. This slurry has fast developed early strength, 24-hour compressive strength being greater than 10 MPa at 30 ℃, thickening time of less than 60 min, API filtration rate of less than 60 mL, and free water of zero. This slurry is stable and is easy to mix, satisfying the cementing requirement in Bohai area.

关 键 词：水泥浆 低密度 颗粒级配 水泥浆性能 固井 固井质量 

分 类 号：TE256.6[石油与天然气工程—油气井工程]