0～100℃,0.1MPa下基于Pitzer模型的NaCl-KCl-CaCl_2完井液密度计算  

Density Calculations for NaCl-KCl-CaCl_2 Completion Fluids Based on Pitzer Model at 0 ～ 100 ℃,0. 1 MPa

作　　者：赵志强[1] 易勇[1] ZHAO Zhi-qiang YI Yong(China Oilfield Services Ltd ,Yanjiao 065201 ,P. R. China)

机构地区：[1]中海油田服务股份有限公司,燕郊065201

出　　处：《科学技术与工程》2016年第34期185-188,共4页Science Technology and Engineering

摘　　要：针对Na Cl-KCl-Ca Cl2混合盐水完井液密度的参考数据较少的问题,进行了Na Cl、KCl及Ca Cl2在0-100℃,0.1 MPa下的Pitzer体积参数回归,并用这些参数进行了单盐溶液及混合溶液密度的计算。结果表明,模型计算的单盐溶液最大相对偏差为0.282 1%,混合溶液最大相对偏差为0.248%,能够满足完井液设计计算需要。Density data of mixed brines completion fluids for NaCl-KCl-CaC12 are referred rarely in documents. So Pitzer＇volumetric parameters of NaCl, KCl and CaCl2 for 0 - 100 ℃ ,0.1MPa were regressed. The regressed pa- rameters were applied to calculate densities of single brine solutions and mixed brines solutions. Calculating results show that the maximum deviation between calculating densities and testing densities for single brine solutions is 0. 2821%, for mixed solutions is 0.248%. Calculating results are qualified for completion fluid designs and calcu- lations.

关 键 词：PITZER模型 密度 完井液 混合溶液 

分 类 号：TE257.6[石油与天然气工程—油气井工程]