非常规/复杂油藏

研究回顾 Eagle Ford 母井压裂分析、预测和缓解

本文重点介绍 Eagle Ford 裂缝冲击的特征、预测其对生产影响的方法以及缓解技术。

裂缝扩展至母井耗尽区域。 由于净压力增加，母井眼位置的裂缝宽度更大。
图1'为裂纹扩展至母井耗尽区域的情况。由于净压力增加，母井眼位置的裂缝宽度更大。

虽然一些井在压裂（FH）后产量有所增加，但许多井由于套管失效或井眼堵塞而出现产量下降或完全丧失产量。完整的论文重点关注 Eagle Ford FH 特征、生产影响预测方法和缓解技术。本文提出的技术和研究结果旨在提高对 FH 趋势及其对非常规油藏开发影响的理解。

跳频检测和数据采集

母井生产数据。作者写道，识别并建立记录每口母井 FH 影响的数据库是一项巨大的工作，康菲石油公司在 Eagle Ford 钻探了 1,600 多口井。然而，大量数据可以很好地记录生产率、含水率、产量和压力的变化。

母井表面压力。母井表面压力数据对于 FH 分析非常重要。

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Unconventional/complex reservoirs

Study Reviews Eagle Ford Parent-Well Frac‑Hit Analysis, Prediction, and Mitigation

This paper focuses on characterization of fracture hits in the Eagle Ford, methods to predict their effects on production, and mitigation techniques.

Fracture propagating into a parent-well depleted region. The fracture width is larger at parent-wellbore locations because of increased net pressure.
Fig. 1—Fracture propagating into a parent-well depleted region. The fracture width is larger at parent-wellbore locations because of increased net pressure.

While some wells show production uplifts after a frac hit (FH), many wells experience production degradation or complete loss of production because of failed casing or plugged wellbores. The complete paper focuses on Eagle Ford FH characterization, production-impact-prediction methods, and mitigation techniques. The techniques and findings presented in this paper are intended to improve the understanding of FH trends and their effects on the development of unconventional reservoirs.

FH Detection and Data Collection

Parent-Well Production Data. The authors write that identifying and building a database recording FH effects for every parent well has been a significant effort, with more than 1,600 wells drilled in the Eagle Ford by ConocoPhillips. This mass of data, however, serves as an excellent record of changes to production rate, water cut, yield, and pressures.

Parent-Well Surface Pressure. Parent-well surface pressure data can be important for FH analysis.

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