高含水期五点法压裂井网的动态产能预测方法
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崔传智(1970—),男,山东青州人,教授,博导,从事油气渗流理论、油气田开发技术方面的研究与教学工作。联系电话:13705469592,E-mail:ccz2008@126.com。

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国家科技重大专项“特高含水期多措施协同优化研究”(2016ZX05010-002-007)。


Dynamic productivity prediction method of five-spot fractured well pattern in high water cut stage
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    摘要:

    高含水期井网压裂产能研究对高含水期井网压裂优化及开发调整意义重大。由于储层物性的非均质性,导致高含水期剩余油分布不均。依据五点法压裂井网及其流线分布特征,将五点法注采单元划分为4个注采区域,每个注采区域再细分为多个计算单元;在考虑剩余油分布不均的基础上,运用流线积分法、物质平衡原理及稳定状态逐次替换法,推导出各计算单元的产能计算方法,合并各计算单元产能,获得高含水期五点法压裂井网产能。新建方法的计算结果与实际动态生产数据的对比结果表明,相对误差小于5%,可满足现场需求。通过分析储层系数、储层非均质性、裂缝无因次导流能力、裂缝穿透比和压裂初期剩余油饱和度对产能的影响可知:储层系数越大,压裂初期剩余油饱和度越高,产能越高,裂缝直接控制区域的储层系数和剩余油饱和度对压裂初期产能影响较大;产能随裂缝无因次导流能力和穿透比的增大而增大,但裂缝无因次导流能力对产能的影响随其增大而减小。

    Abstract:

    The fractured well pattern productivity study is of great significance to optimization and development adjustment in the high water cut stage. Due to the heterogeneity of the reservoir,the remaining oil distribution in the high water cut stage is uneven. According to the streamline distribution characteristics of five-spot well pattern,injection-production units for the five-spot well pattern were divided into 4 injection-production areas,and each area was subdivided into several calculating units. Considering the uneven distribution of the remaining oil,the dynamic productivity prediction method for each calculating unit was proposed by using streamline integral method,material balance principle and steady-state sequential replacement method,and the productivity of five-sport well pattern was further calculated by summarizing the productivity of each calculating unit. The accuracy of the method was verified by comparing with the actual production data with the relative error of less than 5%,which meets the demands of the field. The influences of reservoir coefficient,reservoir heterogeneity,dimensionless fracture conductivity,fracture penetration ratio and remaining oil saturation at early fracturing stage were analyzed. The results show that a better reservoir coefficient and a higher remaining oil saturation lead to the higher productivity. The reservoir coefficient and remaining oil saturation in the fracture control area have great influences on the productivity at initial stage after fractured. The productivity increases with the increase of the dimensionless fracture conductivity and penetration ratio,but the effect of the dimensionless fracture conductivity on the productivity decreases with the increase of the dimensionless fracture conductivity.

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崔传智,杨经纬,吴忠维,单高军,赵凯鑫.高含水期五点法压裂井网的动态产能预测方法[J].油气地质与采收率,2019,26(3):78~84

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  • 在线发布日期: 2019-07-23