井戸の数値モデリングとセメント処理前の形成温度回復
Bo Feng1,2, Long He3, Biao Ou3
1Petroleum Engineering Technology, Institute of SINOPEC Southwest Oil and Gas Branch, Deyang, Sichuan 618000, China.
ACS omega
|August 25, 2025
まとめ
ボトムホールの循環温度 (BHCT) の予測は,掘削液の循環が停止した後の温度回復を考慮することによって改善されます. この研究は,より安全で高品質なセメント処理の精度を高めるために,熱伝導をモデル化しています.
科学分野:
- 石油工学
- 地熱工学
- 流体力学
背景:
- ボトムホールの循環温度 (BHCT) は,セメントの安全性と品質にとって非常に重要です.
- 既存のBHCT予測方法は,循環後の温度回復をしばしば無視しています.
- 温度回復は,セメント処理中の実際のBHCTに大きな影響を及ぼします.
研究 の 目的:
- 静的期間の井戸形成の熱移転を分析する.
- 短時間的な温度回復のための数学的モデルを開発する.
- BHCTの予測精度を温度回復法で改善する.
主な方法:
- 井戸と形成の間の熱伝達モデルの分析.
- モデル仮定に基づく物理構造の簡素化
- 数値計算のための一時的な温度場の数学モデルの開発.
主要な成果:
- 液体の循環により,井戸の下部の温度が低下し,上部の温度が上昇します.
- 静的な期間に温度が徐々に回復する (例えば,静的な外套を24時間使用した後で26.67 °C上昇).
- 長い静的な期間は熱交換を減らし,形成中の放射性温度の影響を拡大します.
- 井戸の軌跡 (積み上げ/水平断面) は温度回復に影響を与え,形成の熱伝導性は最小限の影響を及ぼします.
結論:
- BHCTの正確な予測には,操作前のボトムホールの温度回復を組み込むことが不可欠です.
- 開発されたモデルは,セメント処理の最適化のための理論的基礎を提供します.
- BHCTの正確な予測は,運用の安全性とセメントの品質を向上させます.
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