Determining the Most Effective Diversion Strategy Using Pressure Based Fracture Maps : A Meramec STACK Case Study

J. Kopp, Charles Kahn, C. Allen, Jake Huchton, Clark Robinson, E. Coenen
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引用次数: 4

Abstract

This paper discusses a STACK (Sooner Trend Anadarko Basin Canadian and Kingfisher Counties) case study that determined the effectiveness of different diversion techniques, including pods, sand ramps with sand slugs, rate cycling, and utilization of the completions order to control fracture growth. A secondary goal of this study was to evaluate the suitability of pressure-based fracture maps and oil and water phase tracers in monitoring diverter effectiveness. Effectiveness of a given diverter technique and diverter drop was evaluated using the two techniques on a 3-well pad. The three wells were completed using a combination of: 4 pods per treatment interval6 pods per treatment interval8 pods per treatment intervalhigh-volume proppant loading per treatment interval The effectiveness of the diverter drop was evaluated using each of the diagnostic techniques listed above. The pressure-based fracture analysis uses the pressure response recorded in an isolated stage in the monitor well to compute fracture geometry and the rate of growth of the fracture dimensions. The effectiveness of a given diverter drop is classified into one of four possible categories: stop dominant fracture growth, impede dominant fracture growth, no impact on growth of dominant fracture and accelerate the growth of dominant farcture. These results were then compared with the analysis from oil and water phase tracers and treatment pressure analysis. Successful (effective) diversion was observed on 82 % of the stages with pods compared to 64% successful diversion where sand ramps were used. In addition, stages using 8 pods for diversion had a 15% reduction in average fracture half-length compared to stages using 4 pods. Fracture height was better controlled through the order of completions of the stages between 3 wells. Completing the middle well in the upper part of the zone ahead of the two outer wells in the lower part of the zone, controlled the vertical height growth of the two outer wells. The offset pressure-based analysis proved to be as effective in accurately diagnosing the diverter effectiveness and provided a significant cost and timing advantage compared to other diagnostic techniques.
利用基于压力的裂缝图确定最有效的转向策略:Meramec STACK案例研究
本文讨论了STACK (Sooner Trend,加拿大Anadarko盆地和Kingfisher县)的案例研究,该研究确定了不同导流技术的有效性,包括吊舱、带砂段塞的砂坡道、速率循环和完井利用,以控制裂缝的增长。本研究的第二个目标是评估基于压力的裂缝图和油水相示踪剂在监测暂堵剂有效性方面的适用性。在一个3口井的区块上,使用两种技术评估了给定的暂堵剂技术和暂堵剂滴入的有效性。这三口井的完井方式分别是:每个作业段4个吊舱,每个作业段6个吊舱,每个作业段8个吊舱,每个作业段高容量支撑剂装载量。基于压力的裂缝分析使用监测井中隔离段记录的压力响应来计算裂缝几何形状和裂缝尺寸的增长速度。一种暂堵剂滴入的效果可分为四类:阻止优势裂缝生长、阻碍优势裂缝生长、不影响优势裂缝生长和加速优势裂缝生长。然后将这些结果与油、水相示踪剂分析结果和处理压力分析结果进行比较。在使用吊舱的井段中,有82%的井段成功(有效)导流,而在使用砂坡道的井段中,导流成功率为64%。此外,与使用4个转向器的压裂段相比,使用8个转向器的压裂段平均裂缝半长减少了15%。通过3口井之间的分段完井顺序,可以更好地控制裂缝高度。上部中部井先于下部两口外井完井,控制了两口外井的垂向高度增长。事实证明,与其他诊断技术相比,基于偏置压力的分析在准确诊断暂堵剂有效性方面同样有效,并且具有显著的成本和时间优势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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