渤海油田稠油油藏相态特征实验研究
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摘要
稠油油井数量相对多是渤海油田油藏的一个显著特点,采用PVT实验分析方法,对渤海油田稠油原始井流物、单次脱气、恒质膨胀、原油粘度等特征进行分析实验,并对典型相图进行模拟计算,为渤海油田勘探、开发和生产服务提供科学依据。结果表明渤海油田稠油相态特征具有以下特点:油层埋藏浅、地层压力及温度低;气油比低(4.1～37.7 m~3/m~3);饱和压力低(1.33～14.90 MPa);重质组分含量高(其中C_(7~+)组分含量为58.01%～91.80%);密度大(地层原油密度为0.900 2～0.966 5 g/cm~3);粘度高(地层原油粘度为55.37～8 024.30 mPa·s)。
Bohai Oilfield has been characterized by the relatively large number of heavy oil wells.PVT experimental analysis method is used to analyze the characteristics of initial well stream,single degassing,constant composition expansion and crude oil viscosity of heavy oil in Bohai Oilfield,and analog computation of typical phase diagrams is conducted,providing a scientific basis for exploration,development and production of Bohai Oilfield.The phase behaviors of heavy oil in Bohai Oilfield are as follows:shallow oil reservoir,low formation pressure and temperature,the low gas-oil ratio is4.1-37.7 m~3/m~3,the low saturation pressure is 1.33-14.90 MPa,the content of heavy components is high(of which C7+is 58.01%-91.80%),density is high(0.900 2-0.9665 g/cm~3 of formation crude oil density),and viscosity is high(55.37-8024.30 mPa·s of formation crude oil viscosity).
Bohai Oilfield has been characterized by the relatively large number of heavy oil wells.PVT experimental analysis method is used to analyze the characteristics of initial well stream,single degassing,constant composition expansion and crude oil viscosity of heavy oil in Bohai Oilfield,and analog computation of typical phase diagrams is conducted,providing a scientific basis for exploration,development and production of Bohai Oilfield.The phase behaviors of heavy oil in Bohai Oilfield are as follows:shallow oil reservoir,low formation pressure and temperature,the low gas-oil ratio is4.1-37.7 m~3/m~3,the low saturation pressure is 1.33-14.90 MPa,the content of heavy components is high(of which C7+is 58.01%-91.80%),density is high(0.900 2-0.9665 g/cm~3 of formation crude oil density),and viscosity is high(55.37-8024.30 mPa·s of formation crude oil viscosity).
引文
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[4]舟丹.中海油渤海油田发现亿方级大油田[J].中外能源,2017(11):88.ZHOU Dan.The discovery of the hundred million cubic meters oilfield in CNOOC Bohai Oilfield[J].SinoGlobal Energy,2017(11):88.
[5]张旭东,唐磊,李宝刚,等.渤海油田凝析气藏相态特征研究[J].长江大学学报(自科版),2016,13(32):79-81.ZHANG Xudong,TANG Lei,LI Baogang,et al.Study on phase behaviors of condensate gas reservoirs in Bohai Oilfield[J].Journal of Yangtze University(Natural Science Edition),2016,13(32):79-81.
[6]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,2013,25(4):26-30,35.GUO Taixian,SU Yanchun.Current status and technical development direction for heavy oil reservoir development in Bohai Oilfield[J].China Offshore Oil and Gas,2013,25(4):26-30,35.
[7]张宏友,王月杰,雷源,等.组分模型在高挥发性油藏中的应用:以渤海S油田为例[J].新疆石油地质,2010,31(4):420-422.ZHANG Hongyou,WANG Yuejie,LEI Yuan,et al.Application of compositional model to high volatile oil reservoir:An example from Bohai S field[J].Xinjiang Petroleum Geology,2010,31(4):420-422.
[8]胡治华.渤海稠油油田高含水期储层物性变化规律研究[J].长江大学学报(自科版),2014,11(10):91-94.HU Zhihua.Study on the change law of reservoir physical property in high water cut period of Bohai heavy oil field[J].Journal of Yangtze University(Natural Science Edition),2014,11(10):91-94.
[9]王慎铭.大庆油田F区块油藏流体物性及产能影响因素分析[D].大庆:东北石油大学,2015.WANG Shenming.Analysis of factors affecting fluid properties and production capacity of reservoirs in Fblock of Daqing Oilfield[D].Daqing:Northeast Petroleum University,2015.
[10]夏惠芬,王慎铭,张雁,等.大庆F区块挥发性油藏流体特征及影响因素分析[J].石油化工高等学校学报,2015,28(1):51-54.XIA Huifen,WANG Shenming,ZHANG Yan,et al.Volatile oil reservoir fluid characteristics in F block,Daqing Oilfield and affecting factors analysis[J].Journal of Petrochemical Universities,2015,28(1):51-54.