【作者】 梁文福；

【导师】 汤达祯；

【作者基本信息】 中国地质大学（北京） ， 油气田开发工程， 2010， 博士

【摘要】 喇萨杏油田位于松辽盆地中央坳陷长垣背斜构造带上,处于盆地生油和储油最有利的地带。沉积体系为大型河流-三角洲体,岩性以细砂和粉砂岩为主。主力油层的空气渗透率0.5μm²以上,薄砂层的渗透率在0.02～0.8μm²之间,表外储层的渗透率在0.001～0.05μm²之间,属层状背斜构造油藏。原油性质属于石蜡基原油,含蜡量达20～30%。容积法计算探明地质储量41.9429×10⁸t,动用地质储量41.7426×10⁸t,可采储量21.599×10⁸t,剩余可采储量3.1119×10⁸t。喇萨杏油田1960年6月投入开发,经历了上产、稳产高产阶段后,目前处于“双特高”产量递减阶段。截止到2008年末,已累积生产原油18.4880×10⁸t,采出地质储量的44.29%,采出可采储量的85.59%;2008年生产原油3275.3×10⁸t,地质储量采油速度0.78%,剩余可采储量采油速度9.76%,综合含水91.3%。改善“双特高”开发阶段的开发效果,必须搞清剩余潜力资源,制定科学的开发对策,努力增加可采储量,稳定产量,减缓产量递减速度。本文根据相对渗透率曲线、密闭取芯井资料和开发动态数据,建立了符合喇萨杏油田实际情况的分类油层远景潜力预测方法,落实了油田开发资源潜力,为制定油田开发技术政策,编制油田开发规划提供了科学依据。利用水驱特征曲线和相对渗透率曲线,建立了多层合采条件下分类油层动态地质储量计算方法,计算了分类油层的动用储量;综合分析了喇萨杏油田密闭取芯井资料,搞清了分类油层的水洗状况;依据取芯井资料和相渗透率曲线,建立了喇萨杏油田各类油层剩余可动油计算方法,落实了剩余潜力分布状况;利用取芯井资料,采用统计回归方法建立了不同类型油层的^R-f_w关系式,预测了各类油层的水驱采收率潜力;依据室内相对渗透率实验和取芯井的资料,研究了水驱、聚驱、三元复合驱驱动方式下的驱替效率计算方法,计算了不同驱动方式的极限驱油效率;利用密闭取芯井资料建立了波及系数与含水率的关系,预测了各类油层极限含条件下的波及系数;运用概率决策分析方法,优选设计了油田提高采收率方案,给出了远景潜力。更多还原

【Abstract】 La-Sa-Xing Oilfields is located in the Depression Placanticline anticline belt in the Central Basin,and oil generation and oil storage are best in the basin.Deposition system is the major river - delta system,and lithology is mainly the principle of fine sandstone and siltstone.When Air permeability of the major reservoirs is over 0.5μm~2,permeability is amongst 0.02～0.8μm~2 in the thin sand.Reservoir is laminar anticlinal structure reservoir when permeability of the useless reservoir is amongst 0.001～0.05μm~2.The crude oil is green oil,and the paraffin content reaches to 20 ~ 30 percent.Calculated by volumetric method,proved geologic reserve is 41.9429×10~8t,producing geologic reserve is 41.7426×10~8t, recoverable reserves is 21.599×10~8t and the quantity of remaining recoverable oil is 3.1119×10~8t.La-Sa-Xing Oilfields,placed on production from June 1960,has experienced on the production stage,stable yields stage and high production stage,now the oil field comes to the double extra high production declining stage.By the end of 2008,the accumulative oil production is 18.4880×10~8t,the producing geologic reserve is 44.29 percent,and the producing recoverable reserves is 85.59 percent.In 2008,oil production is 3275.3×10~8t,the oil production rate is 0.78 percent,the recoverable reserves oil production rate is 9.76 percent,and the composite water is 91.3 percent.To improve the development effect of double extra high development stage which means increase recoverable reserves、constant flow rate and slow down decline rate,the potentiality of remaining oil has to be figured out,and scientific development strategies have to be worked out.Based on phase permeability curve、hermetic core hole data and dynamic development data,forecasting method of prospective potentiality for the classified oil layers is set up which is closer to the true situation of Lasaxing oilfield.The oilfield development permeability is calculated,which provides scientific foundation for establishing development technical policy and compiling development program.According to the waterflooding characteristic curve and effective permeability curve, dynamic geological reserves equation for the classified oil layers in the condition of multi-layer production is established,with which producing reserves can be calculated.Through analyzing the hermetic core hole data in Lasaxing oilfield,water flushed zones has been figured out.On the basic of the core hole data and phase permeability curve, calculation procedure of remaining oil for every oil layer of Lasaxing Oilfield has been established.The distribution of remaining oil is measured.The relation of R - f_w for different types of oil layer can be built by statistics regression method through the use of the core hole data,which can predict the potentiality of water displacement recovery for different types of oil layer.On the basis of laboratory effective permeability test data and the core hole data,the displacement efficiency equation of water drive、polymer flooding and ASP have been set up,and relevant ultimate displacement efficiency equations have also been defined.The relationship between conformance efficiency and water cut is set up by the use of hermetic core hole data,which can forecast the conformance efficiencies of every oil layer with extreme containing water.The enhanced recovery scheme of oil field is optimized through using probabilistic decision analysis method,and the prospective potentiality is calculated.更多还原