低速泵抽系统研制与应用
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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.
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.
引文
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[2]杨兴琴,王书南,周子皓.地层测试与井下流体取样分析技术进展[J].测井技术,2012,36(6):551-558.YANG Xingqin,WANG Shunan,ZHOU Zihao.Development of formation test and downhole fluid sampling and analysis technology[J].Well Logging Technology,2012,36(6):551-558.
[3]郭太现,苏彦春.渤海油田稠油油藏开发现状和技术发展方向[J].中国海上油气,2012,25(4):26-30.GUO Taixian,SU Yanchun.Development status and development direction of heavy oil reservoirs in Bohai oilfield[J].China Offshore Oil and Gas,2012,25(4):26-30
[4]MIHAI E,KVACˇEK P J,VASILE爦,et al.Maastrichtian dicotyledons of the Rusca Montanand Haeg basins,South Carpathians,Romania[J].Cretaceous Research,2016:699-712.
[5]ARBACKA M,BODOR E,JARZYNKA A,et al.Statistics and palaeoenvironmental proxies[J].European Jurassic Floras,2014(2):158-174.
[6]王建红,白玉洪,张振宇,等.新型地层测试仪RCX及其在涠西区块应用[J].石化技术,2017(1):160-161.WANG Jianhong,BAI Yuhong,ZHANG Zhenyu,et al.New formation tester RCX and its application in Weizhou block[J].Petrochemical Industry Technology,2017(1):160-161.
[7]MORGAN C,PISTRE V,KINOSHITA T,et al.Formation testing enables comprehensive characterization[J].E&P,2013(6):26-29.
[8]周明高,刘书民,冯永仁,等.钻井中途油气层测试仪(FCT)研究进展及其应用[J].测井技术,2008,32(1):72-75.ZHOU Minggao,LIU Shumin,FENG Yongren,et al.Research on formation characteristic tool and application[J].Well Logging Technology,2008,32(1):72-75.
[9]尤国平,冯永仁.精密数字泵抽在电缆地层测试器中的应用[J].测井技术,2008,32(2):263-266.YOU Guoping,FENG Yongren.A precise digital pump for wireline formation tester[J].Well Logging Technology,2008,32(2):263-266.
[10]刘太广,朱晓宇,苗韵.一种基于旋变电机控制的正余弦乘法器设计[J].电子与封装,2018,18(2):29-36.LIU Taiguang,ZHU Xiaoyu,MIAO Yun.A design of SIN/COS multiplication on the basic of the resolver control system[J].Electronics&Packing,2018,18(2):29-36.