泥浆侵入与返排液中离子含量的定量分析方法  

Quantitative Analysis of Ion Concentration of Effluent duringMud Invasion and Flowback

作　　者：尚锁贵 刘红岐 王健 刘海波[3] 杨玉卿[3] 杨征世 陈一建 SHANG Suogui;LIU Hongqi;WANG Jian;LIU Haibo;YANG Yuqing;YANG Zhengshi;CHEN Yijian(Tianjin Branch of CNOOC(China)Co.LTD.,Tanggu Tianjin 300450,China;College of Geosciences and Technology,Southwest Petroleum University,Chengdu 610500,China;China Oilfield Services Co.LTD.,Sanhe Hebei 065201,China)

机构地区：[1]中海石油天津分公司,天津塘沽300450 [2]西南石油大学地球科学与技术学院,成都610500 [3]中海油田服务股份有限公司,河北三河065201

出　　处：《重庆科技学院学报（自然科学版）》2020年第5期9-14,40,共7页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项“大型油气田及煤层气开发”子课题“超低渗地层测试技术与装备”(2017ZX05019-004)。

摘　　要：泥浆侵入地层后,地层的物性会发生变化。地层测试作业中,泥浆滤液会与原始地层流体一起进入取样器,以致取样液体与侵入前泥浆滤液中的离子类型及含量存在较大差异,从而容易导致对原始地层流体类型的误判。定量分析取样液体中的离子类型与含量,掌握泥浆侵入后离子的变化规律,有助于正确判断地层流体类型。通过泥浆侵入和返排实验,测试泥浆侵入前和返排过程中泥浆滤液中离子的类型和含量,分析影响返排液离子含量变化的主要因素,从而运用多元线性回归的方法建立了返排液离子含量计算模型。运用此模型,分别根据实验数据和现场数据计算得到的返排液离子含量,其相关性均超过0.9。Mud invasion into the formation will change the physical properties of the formation.In addition,during the formation test operations,the mud filtrate comes together with the original fluid into the chamber of tool,which would cause great difficulties to the analysts to determine fluid type of the formation,because the different ions of the original fluid in the formation and mud filtrate ions are mixed together.How to quantitatively analyze the ion type and concentration in the sampling fluid and analyze the ion change process after mud invasion is very important for understanding the mud invasion mechanism and judging the formation fluid type.According to the mud filtrate invasion and backflow experiment,the type and concentration of ions in mud filtrate is tested before its invasion and backflow process.The main factors affecting the ion content of the flowback liquid are analyzed and the calculation model of ion content in the flowback liquid is established by multiple linear regression method.With this model,the ion content of the flowback liquid is calculated according to the experimental data and field data,and the correlation is more than 0.9.

关 键 词：地层测试 泥浆滤液 泥浆侵入 泥浆返排 离子含量 计算模型 

分 类 号：P631[天文地球—地质矿产勘探]