杏南十区纯油区东部周期注水方法研究
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摘要
随着油田进入高含水期,油田储采失衡矛盾加剧、老井措施效果逐年变差、含水上升速度进一步加快,井网间调整余地越来越小,产量递减速度进一步加快,挖潜的难度越来越大,因此,寻求一种效果好,能进一步提高开发效果的技术已成为油田研究的主要方向。周期注水是改善油田开发效果的有效手段之一,具有投资小,见效快,减少低效产出和提高油田总体开发效益的优点。
本文对周期注水提高采收率机理进行了详细研究,并在此基础上,根据杏南十区纯油区东部的油藏概况,利用petrel建模软件,建立了不同类型砂体周期注水区块的相控地质模型,利用Eclipse数值模拟软件建立了不同类型砂体的模拟模型,并进行了历史拟合,其拟合结果达到拟合精度要求。利用模拟模型对不同类型砂体进行周期注水方法研究,结果表明,不同类型砂体的周期注水开发效果均好于常规连续注水开发效果;不同类型砂体的周期注水合理时机不同;不同类型砂体周期注水的速敏性不同。利用模拟模型进行了不同类型砂体周期注水合理工作制度研究,结果表明,在相同条件下,同步周期注水的开采效果好于异步周期注水,不同类型砂体的合理工作制度均为注水井注6个月,停6个月,油井长期生产。该研究成果将为改善杏南十区纯油区东部的注水开发效果,抑制含水上升速度提供理论参考。
As the oil into the high water cut stage, the overbalance contradictions between reservoir and oil recovery was intensified, the effectiveness of measures of historical wells was worse year by year, the rate of water increased was further accelerate, the adjustment scope of pattern of well was less and less, the rate of production decline was further speed up, the difficulty of exploitation was greater, so it is main direction of research fields to find a good technology which effect well, can further enhance the development effectiveness. Cyclic water injection is one of the effective methods to improve the effect of oilfield development, with small investment, rapid, reduce the inefficient output and improve oilfield development benefits overall advantages.
In this paper, the mechanism of cyclic water injection method had a detailed theoretical analysis, According to the geological features of the oilfield, using petrel modeling software to establish the phased geological model of cyclic water injection in different types of sand body. Simulation model of studied area is simulated by Eclipse, and matching water flooding history, which satisfies the precision request. The researchment of cycle water injection in different types of sand body was conducted by numerical simulation, the results showed that in different types of sand body, cyclic water injection is better than conventional water injection; Reasonably time of cyclic water injection and injection rate are difference in different types of sand body. The reasonable working system of cycle water injection in different types of sand body was researched, the results showed that at the same condition of water injection cycle, the development effect of synchronous periodic water injection performed better than that of asynchronous periodic water injection. The reasonable operational procedure of every type of sand body was that production wells would have long-term productions if water was injected into injection wells for 6 months and stopped for another 6 months. The research results will provide a theoretical reference to improve the development effects and control the velocity of water rising in Tenth-section in Nouthern Xingnan Pure Oil Zone.
本文对周期注水提高采收率机理进行了详细研究,并在此基础上,根据杏南十区纯油区东部的油藏概况,利用petrel建模软件,建立了不同类型砂体周期注水区块的相控地质模型,利用Eclipse数值模拟软件建立了不同类型砂体的模拟模型,并进行了历史拟合,其拟合结果达到拟合精度要求。利用模拟模型对不同类型砂体进行周期注水方法研究,结果表明,不同类型砂体的周期注水开发效果均好于常规连续注水开发效果;不同类型砂体的周期注水合理时机不同;不同类型砂体周期注水的速敏性不同。利用模拟模型进行了不同类型砂体周期注水合理工作制度研究,结果表明,在相同条件下,同步周期注水的开采效果好于异步周期注水,不同类型砂体的合理工作制度均为注水井注6个月,停6个月,油井长期生产。该研究成果将为改善杏南十区纯油区东部的注水开发效果,抑制含水上升速度提供理论参考。
As the oil into the high water cut stage, the overbalance contradictions between reservoir and oil recovery was intensified, the effectiveness of measures of historical wells was worse year by year, the rate of water increased was further accelerate, the adjustment scope of pattern of well was less and less, the rate of production decline was further speed up, the difficulty of exploitation was greater, so it is main direction of research fields to find a good technology which effect well, can further enhance the development effectiveness. Cyclic water injection is one of the effective methods to improve the effect of oilfield development, with small investment, rapid, reduce the inefficient output and improve oilfield development benefits overall advantages.
In this paper, the mechanism of cyclic water injection method had a detailed theoretical analysis, According to the geological features of the oilfield, using petrel modeling software to establish the phased geological model of cyclic water injection in different types of sand body. Simulation model of studied area is simulated by Eclipse, and matching water flooding history, which satisfies the precision request. The researchment of cycle water injection in different types of sand body was conducted by numerical simulation, the results showed that in different types of sand body, cyclic water injection is better than conventional water injection; Reasonably time of cyclic water injection and injection rate are difference in different types of sand body. The reasonable working system of cycle water injection in different types of sand body was researched, the results showed that at the same condition of water injection cycle, the development effect of synchronous periodic water injection performed better than that of asynchronous periodic water injection. The reasonable operational procedure of every type of sand body was that production wells would have long-term productions if water was injected into injection wells for 6 months and stopped for another 6 months. The research results will provide a theoretical reference to improve the development effects and control the velocity of water rising in Tenth-section in Nouthern Xingnan Pure Oil Zone.
引文
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[13]谢绪权,罗洪,陈素珍,等.周期注水可行性评价公式[J].河南石油,2000(5):32-34.
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[18]路士华,牛乐琴,李东霞.层状砂岩油藏周期注水动态参数优选[J].断块油气田,2003,10(1):44-46.
[19]姜泽菊,安申法,于彦,等.注水油田转周期注水开发影响因素探讨[J].石油钻探技术,2005,33(6):54-56.
[20]朱恩灵.周期注水技术的应用效果[J].世界石油工业,1993,6(5):19-22.
[21]慕立俊,刘锦玉,刘书炳.高地饱压差非均质油藏周期注水油水交渗机理研究[J].试采技术,2006,27(3):4-6.
[22]黄希陶译.裂缝型油田开发特征[M].石油工业出版社(北京),1986.
[23]R.j.Erlght, Spraberry Cyclic Technique May Get 500 Milion bbl of oll. Oil and Gas Jourea], 1962. No 8, 30-34.
[24]Elkins. L. F and Skov. A M,“Cyclic Water flooding the Spraberry Utilizes‘End Effects’to Increase Oil Production Rate.”JPT. Aug 1963, 877-884.
[25]M George. E.T. Guidroz. O.Daneiel Project-A Successlul Spraberry Flood. JPT, 1967, No 9, 1l33-1140.
[26]沙尔巴托娃,M.苏尔古切夫[苏]著.层状不均质油层的周期注水开发.王福松译.北京:石油工业出版社,1989.
[27]汪嘉联.扶余油田西区应用周期注水,改善高含水期油田注水开发效果实例[M].石油工业出版社(北京),1993.
[28]殷代印,翟运芳,卓兴家.非均质砂岩油藏周期注水的室内实验研究[J].大庆石油学院学报,2000,24(1):82-84.
[29]张继春,柏松章,张亚娟,等.周期注水实验及增油机理研究[J].石油学报,2003,24(2):76-80.
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