To describe the complex phase transformation in the process of depletion exploitation of volatile oil reservoir,four fluid phases are defined,and production and remaining volume of these phases are calculated based on...To describe the complex phase transformation in the process of depletion exploitation of volatile oil reservoir,four fluid phases are defined,and production and remaining volume of these phases are calculated based on the principle of surface volume balance,then the recovery prediction method of volatile oil reservoir considering the influence of condensate content in released solution gas and the correction method of multiple degassing experiments data are established.Taking three typical kinds of crude oil(black oil,medium-weak volatile oil,strong volatile oil)as examples,the new improved method is used to simulate constant volume depletion experiments based on the corrected data of multiple degassing experiment to verify the reliability of the modified method.By using"experimental data and traditional method","corrected data and traditional method"and"corrected data and modified method",recovery factors of these three typical kinds of oil are calculated respectively.The source of parameters and the calculation methods have little effect on the recovery of typical black oil.However,with the increase of crude oil volatility,the oil recovery will be seriously underestimated by using experimental data or traditional method.The combination of"corrected data and modified method"considers the influence of condensate in gas phase in both experimental parameters and calculation method,and has good applicability to typical black oil and volatile oil.The strong shrinkage of volatile oil makes more"liquid oil"convert to"gaseous oil",so volatile oil reservoir can reach very high oil recovery by depletion drive.展开更多
针对边底水气藏开发中后期产水量上升、污水排海量超标的问题,文章以某边底水气田为靶区,开展了边底水气藏污水回注井层优选的研究,初步建立了区域井层优选技术,综合地震属性、反演预测、测井解释和生产动态等,优选出4套回注层位及4口...针对边底水气藏开发中后期产水量上升、污水排海量超标的问题,文章以某边底水气田为靶区,开展了边底水气藏污水回注井层优选的研究,初步建立了区域井层优选技术,综合地震属性、反演预测、测井解释和生产动态等,优选出4套回注层位及4口回注井。研究成果已应用于靶区首次污水回注试验,单井日注水规模达100~250 m 3,回注总量超过1.1×104 m 3,有效防止了污水排海从而造成环境污染的问题。展开更多
基金Supported by the China National Science and Technology Major Project(2016ZX05027)。
文摘To describe the complex phase transformation in the process of depletion exploitation of volatile oil reservoir,four fluid phases are defined,and production and remaining volume of these phases are calculated based on the principle of surface volume balance,then the recovery prediction method of volatile oil reservoir considering the influence of condensate content in released solution gas and the correction method of multiple degassing experiments data are established.Taking three typical kinds of crude oil(black oil,medium-weak volatile oil,strong volatile oil)as examples,the new improved method is used to simulate constant volume depletion experiments based on the corrected data of multiple degassing experiment to verify the reliability of the modified method.By using"experimental data and traditional method","corrected data and traditional method"and"corrected data and modified method",recovery factors of these three typical kinds of oil are calculated respectively.The source of parameters and the calculation methods have little effect on the recovery of typical black oil.However,with the increase of crude oil volatility,the oil recovery will be seriously underestimated by using experimental data or traditional method.The combination of"corrected data and modified method"considers the influence of condensate in gas phase in both experimental parameters and calculation method,and has good applicability to typical black oil and volatile oil.The strong shrinkage of volatile oil makes more"liquid oil"convert to"gaseous oil",so volatile oil reservoir can reach very high oil recovery by depletion drive.
文摘针对边底水气藏开发中后期产水量上升、污水排海量超标的问题,文章以某边底水气田为靶区,开展了边底水气藏污水回注井层优选的研究,初步建立了区域井层优选技术,综合地震属性、反演预测、测井解释和生产动态等,优选出4套回注层位及4口回注井。研究成果已应用于靶区首次污水回注试验,单井日注水规模达100~250 m 3,回注总量超过1.1×104 m 3,有效防止了污水排海从而造成环境污染的问题。
