四棵树凹陷高探1井流体特征及油藏类型分析
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摘要
利用气相色谱法对高探1井分离气和分离油进行了油气组成分析。开展高探1井地面原油特性研究,并运用高温高压地层原油分析仪对高探1井地层流体高压物性特征进行了深入研究。结果表明,高探1井地层流体中C1—C5组分含量达71.41%,轻质烃含量较高,重质成分含量低,含蜡量中等、密度低、黏度低、凝固点中等,具有挥发性油的特征。地层原油在地层条件下为单相液态流体,地层异常高压,地饱压差大,地层能量充足,地层油体积收缩率较高,弹性能量较强。结合地层流体高压物性数据,利用储集层流体三元组成三角图、油气藏判别参数(φ_1)综合判断,初步认为高探1井的油藏类型为低饱和挥发性油藏。
Hydrocarbon compositions of the separated gas and oil from the Well Gaotan-1 are analyzed by using gas chromatography. The features of the surface oil from the Well Gaotan-1 is studied and in-depth research is carried out for formation fluid physical properties with PVT experimental instrument. The results show that for the formation fluids in the Well Gaotan-1, the content of C1—C5 components reach71.41%, the content of light hydrocarbons is relatively high, the content of heavy components is low, the wax content and freezing point are medium, the density and viscosity are low, indicating characteristics of volatile oil. The crude oil is single-phase liquid under the formation conditions, the formation pressure is abnormally high, the difference between formation pressure and saturated pressure is large, the formation has sufficient energy, the shrinkage rate of the formation oil is relatively high and the elastic energy is relatively strong. Combining with the PVT data of the formation fluid and using a triangle chart of three elements in reservoir fluid and reservoir identification parameters(φ_1), the paper considers that the reservoir in the Well Gaotan-1 is a low-saturation volatile oil reservoir.
Hydrocarbon compositions of the separated gas and oil from the Well Gaotan-1 are analyzed by using gas chromatography. The features of the surface oil from the Well Gaotan-1 is studied and in-depth research is carried out for formation fluid physical properties with PVT experimental instrument. The results show that for the formation fluids in the Well Gaotan-1, the content of C1—C5 components reach71.41%, the content of light hydrocarbons is relatively high, the content of heavy components is low, the wax content and freezing point are medium, the density and viscosity are low, indicating characteristics of volatile oil. The crude oil is single-phase liquid under the formation conditions, the formation pressure is abnormally high, the difference between formation pressure and saturated pressure is large, the formation has sufficient energy, the shrinkage rate of the formation oil is relatively high and the elastic energy is relatively strong. Combining with the PVT data of the formation fluid and using a triangle chart of three elements in reservoir fluid and reservoir identification parameters(φ_1), the paper considers that the reservoir in the Well Gaotan-1 is a low-saturation volatile oil reservoir.
引文
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[2]朱文,吴朝东,王家林,等.准噶尔盆地四棵树凹陷三叠系物源及其构造意义[J].新疆石油地质,2017,38(5):512-518.ZHU Wen,WU Chaodong,WANG Jialin,et al.Triassic provenance and its tectonic significance in Sikeshu sag,Junggar basin[J].Xinjiang Petroleum Geology,2017,38(5):512-518.
[3]张驰,于兴河,李顺利,等.准噶尔盆地南缘井井子沟组露头沉积特征及模式[J].新疆石油地质,2017,38(5):544-552.ZHANG Chi,YU Xinghe,LI Shunli,et al.Sedimentary characteristics and model of outcrop in Jingjingzigou formation of southern margin,Junggar basin[J].Xinjiang Petroleum Geology,2017,38(5):544-552.
[4]全国石油天然气标准化技术委员会.油气藏流体物性分析方法:GB/T 26981-2011[S].北京:中国标准出版社,2012.National Petroleum and Natural Gas Standardization Technical Committee.Test method for reservoir fluid physical properties:GB/T26981-2011[S].Beijing:Standard Press of China,2012.
[5]刘桂玲,徐建军,张进,等.XW地区油藏相态特征实验研究[J].复杂油气藏,2016,9(1):55-58.LIU Guiling,XU Jianjun,ZHANG Jin,et al.Experimental study on phase characteristics of reservoir in XW region[J].Complex Hydrocarbon Reservoirs,2016,9(1):55-58.
[6]袁淑英.安集海地区安5井安集海河组油藏流体相态特征[J].科技资讯,2015,13(20):226-227.YUAN Shuying.Fluid phase characteristics of the Anjihaihe formation reservoir in An 5 well of Anjihai area[J].Science&Technology Information,2015,13(20):226-227.
[7]妥宏,甄亚丽,李遇江,等.卡因迪克油田挥发性油藏流体特征分析[J].特种油气藏,2006,13(5):71-74.TUO Hong,ZHEN Yali,LI Yujiang,et al.Fluid property of the volatile reservoirs in Kayindike oilfield[J].Special Oil&Gas Reservoirs,2006,13(5):71-74.
[8]李菊花,李相方,刘滨.具有组分梯度的挥发性油藏组分分布规律[J].新疆石油地质,2010,31(1):81-84.LI Juhua,Li Xiangfang,LIU Bin.Compositional distribution in volatile oil reservoir with compositional gradient[J].Xinjiang Petroleum Geology,2010,31(1):81-84.
[9]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 Bay S field[J].Xinjiang Petroleum Geology,2010,31(4):420-422.
[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.
[11]陈乾宇.近临界挥发性生屑云岩油藏生产特征与开发模式研究[D].成都:西南石油大学,2017.CHEN Qianyu.The study on production performance and development mode of near-critical volatile bioclastic dolostone reservoir[D].Chengdu:Southwest Petroleum University,2017.
[12]孙之道.油气藏流体类型判别方法[J].石油勘探与开发,1996,23(1):69-75.SUN Zhidao.Methods for determining the type of different oil and gas reservoirs fluid[J].Petroleum Exploration and Development,1996,23(1):69-75.
[13]油气田开发专业标准化委员会.凝析气藏相态特征确定技术要求:SY/T 6101-2012[S].北京:石油工业出版社,2013.Standardization Committee for Oil and Gas Field Development.Technical requirements for determining phase behaviors of gas condensate reservoirs:SY/T 6101-2012[S].Beijing:Petroleum Industry Press,2013.