边底水油藏水体及储层参数定量评价
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于清艳(1989—),女,山东青岛人,在读博士研究生,从事油气藏开发相关研究工作。联系电话:18813097036,E-mail: 591955868@qq.com。

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国家科技重大专项“超高压有水气藏高效开发技术”(2016ZX05015-002)和“稠油、碳酸盐岩和致密油藏开发主体技术与应用潜 力”(2016ZX05016-006)。


Quantitative research of aquifer and reservoir parameters for reservoirs with edge/bottom water
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    摘要:

    对于有强边底水能量的油藏来说,油水关系复杂,一般情况下不具有统一油水界面,边底水的窜进将严重影响油井的产能以及生产的稳定性。油井开发初期,通过有限的钻井等资料全面认识油藏有一定的困难,而准确获得该类油藏的储层参数、水体体积、水侵指数及水侵量是合理开发此类油藏的关键。基于Blasingame现代产能递减分析方法,利用拟稳态水侵模型,推导油藏拟稳态水侵情况下储层参数评价方法,用于计算水侵量、水体体积、水侵指数、动态储量以及各储层参数。该方法首先将油井生产阶段划分为未水侵期、水侵初期及水侵中后期,然后通过未水侵期油井生产动态数据拟合Blasingame典型曲线进行动态储量、储层参数等评价,通过水侵初期油井生产动态数据拟合进行水体体积、水侵量和水侵指数的定量评价。对比数值模拟概念模型生产动态数据和运用所建方法拟合求解结果可知,动态储量误差为-3.31%,渗透率误差为2.60%,水体体积误差为-2.5%,新建方法拟合结果误差在可以接受的范围内,不会对开发方式的制定造成严重影响。

    Abstract:

    Oil reservoirs with strong edge/bottom water often have complex oil-water relationship and no uniform oil-water contact,and the coning of edge/bottom water would severely influence oil well production and its stability. In the early production stage,it is difficult to know the reservoir only according to limited well drilling data. However,the key to develop this kind of reservoirs is to obtain reservoir parameters,aquifer volume,water invasion index and water influx. Based on the advanced Blasingame production decline analysis method,pseudo-steady state water invasion model was applied to deriving the reservoir parameter evaluation method for the reservoirs with pseudo-steady state water invasion. The water influx,aquifer volume,water invasion index,dynamic reserves and reservoir parameters were calculated quantitatively. This method firstly divides well production history into three periods:no water invasion period,early water invasion period and middle-late water invasion period. Then the reservoir parameters and well dynamic reserves can be evaluated by matching well production data of no water invasion period with the typical advanced Blasingame production decline curve,and the aquifer volume,water invasion index and water influx can be quantitatively evaluated by matching well production data of early water invasion period. Finally,the numerical simulation result of the established conceptual model verifies that the method is practicable. The error of the dynamic reserves is -3.31%,the error of the permeability is 2.60% and that of the aquifer volume is -2.5%. The matched results of the new method have acceptable errors,which cannot influence the determination of development mode greatly.

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于清艳,刘鹏程,李勇,郝明强,夏静,李保柱.边底水油藏水体及储层参数定量评价[J].油气地质与采收率,2017,24(3):85~90

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  • 在线发布日期: 2017-03-29