低速泵抽系统研制与应用  

Development and application of low-speed pumping system

作　　者：周明高[1] 郝桂青[1] 陈永超[1] 薛永增[1] ZHOU Minggao;HAO Guiqing;CHEN Yongchao;XUE Yongzeng(China Oilfield Service Limited,Sanhe,Hebei 065201,China)

机构地区：[1]中海油田服务股份有限公司,河北三河065201

出　　处：《中国海上油气》2019年第2期76-82,共7页China Offshore Oil and Gas

基　　金："十三五"国家科技重大专项"超低渗测试技术与装备(编号:2016ZX05019-004)"部分研究成果

摘　　要：低速泵抽是解决稠油、出砂、低孔低渗等复杂储层测压取样的关键技术,国外油田服务公司凭借该项技术长期垄断着该类储层的测压取样市场。结合中海油田服务有限公司研制的钻井中途油气层测试仪(EFDT)的特点,提出了2种降低泵速方式,即调节泵抽缸活塞比和控制泵抽缸流量;进一步研制了相应的低速泵抽设备,即小排量精密泵抽模块和宽频调速液压动力模块,并进行了室内测试、实验井测试及现场作业应用。本文研制的低速泵抽系统能大幅度降低与精准控制EFDT仪器泵抽速度,实现了对稠油、出砂、低孔渗等复杂储层的地层测试,极大地拓展了EFDT的应用范围,填补了国内空白。Low-speed pumping is the key technology for solving the pressure measurement sampling of complex reservoirs featured by heavy oil,sand production,low porosity and low permeability.Foreign oilfield service companies,depending on this technology,monopolizes the pressure measurement sampling market of such reservoirs.Combined with the characteristics of the Enhanced Formation Dynamic Tester(EFDT)developed by China Oilfield Services Limited,two low-speed pumping methods were proposed,namely,the pumping cylinder-piston ratio adjustment and the pumping cylinder flow rate controlling;one new corresponding low-speed pumping equipment was developed,namely the small displacement precision pumping module and hydraulic power module with wide frequency speed regulation,and were tested in lab,experimental well and field.The low-speed pumping system proposed in this paper can greatly reduce and accurately control the pumping speed of EFDT instruments,and realize the formation test of complex reservoirs,which greatly expands the application range of EFDT and fills the domestic technical gap.

关 键 词：测压取样 稠油储层 出砂 低孔低渗储层 低速泵抽系统 小排量精密泵抽模块 宽频调速液压动力模块 

分 类 号：TE142[石油与天然气工程—油气勘探]