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首页> 外文会议>SPE Improved Oil Recovery Conference >A Novel EOR Technique for the Attic Oil in Dipping Faulted Reservoirs byUtilizing Gas Oil Countercurrent and Water Flooding Assistance
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A Novel EOR Technique for the Attic Oil in Dipping Faulted Reservoirs byUtilizing Gas Oil Countercurrent and Water Flooding Assistance

机译：一种新型EOR技术，用于浸渍断层储层抵抗汽油逆流和水洪水辅助

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After long-term water flooding in dipping faulted reservoirs,attic oil is formed and located above thestructurally highest wells.A novel technique that combines the Gas Oil Countercurrent(GOC)and WaterFlooding Assistance(WFA)is proposed in this paper in order to recover this type of remaining oil.Thebasic GOC mode includes three procedures,that is,gas injection,well shut-in to form a Secondary GasCap(SGC),and production.For the new method GOC-WFA,the WFA is considered in the gas injectionand production stage.In this paper,the basic GOC and GOC-WFA experiments are performed to elaboratethe EOR mechanism and efficiency of the new method.Three experiment cycles are performed in eachexperiment.The experiment results illustrate that the WFA can improve the production efficiency byshortening the well shut-in time.The SGC condition is much better in GOC-WFA compared to the GOC inthe same well shut-in time.The well shut-in time can be shortened by 50%.In the production stage,the SGCexpansion and WFA create Double Displacement Process(DDP).The WFA can inhibit the gas channelingand lower the pressure decline rate.Besides,WFA can also displace the remaining oil located between theproduction and injection well that cannot be displaced by the gas cap expansion.Compared to the basicGOC,the total oil production volume is nearly doubled.Based on the production model of GOC-WFA,thesensitivity of various operational and geological parameters is analyzed by the reservoir simulation method.Then,the fault-block reservoir screening condition for GOC-WFA is established;the injection-productionparameters in the gas injection and production stage are optimized.Finally,the EOR feasibility of the GOC-WFA in the fault-block reservoir is testified by the experimental and simulation results.Therefore,the GOC-WFA can effectively enhance oil recovery in the sealed mature fault-block reservoir.
机译：在浸渍断层储层中长期用水泛滥后，阁楼油形成并位于井下的最高井中。在本文中结合了煤气油逆流（GOC）和水电辅助（WFA）的新技术，以便恢复这一点剩余油的类型。基本GOC模式包括三个程序，即气体注入，良好地闭合以形成次级气囊（SGC）和生产。对于新方法GoC-WFA，WFA被认为是在天然气注射中考虑生产阶段。在本文中，基本的GOC和GoC-WFA实验进行了精心制造的EOR机制和新方法的效率。实验循环在0例中进行。实验结果表明，WFA可以提高通过校验的生产效率完好的关闭时间。与GoC-WFA相比，SGC条件在同样良好的时间内比较的情况更好。在生产阶段，可以缩短良好的关闭时间。在生产阶段，SGCEXPANSION A ND WFA创造双位移过程（DDP）。WFA可以抑制气体通道，降低压力下降率。这些，WFA也可以使剩余的油位于生产和注入井之间的剩余油，这不能被气体帽扩展所取代的生产和注入井。基础菌，总石油产量几乎加倍。基于Goc-WFA的生产模型，通过储层模拟方法分析了各种操作和地质参数的杂志。该方法，GoC-WFA的故障块储层筛选条件是建立的;注射 - 生产参数在气体喷射和生产阶段进行了优化。最后，通过实验和模拟结果作证了故障块储存器中Goc-WFA的EOR可行性。因此，GoC-WFA可以有效提高密封成熟断路器储层中的储存。

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