シェイルの膨張が,水力断裂の際に発生する"in situ"ストレスに与える影響
1Engineering Technology Research Institute of Southwest Oil & Gas Field Company, PetroChina, Chengdu 610017, China.
ACS omega
|February 16, 2026
まとめ
液圧破砕液からのシェール膨張は,刺激された貯蔵容量 (SRV) 内のインシットストレスを変化させます. この膨張は,圧縮から引力へのストレスをシフトし,ストレスの評価と貯蔵庫の性能に影響を与えます.
科学分野:
- 地質学 地質学 地質学
- 石油工学は,石油工学である.
- ジオメカニクス ジオメカニクス
背景:
- シェール形成における水力破裂は,流体と岩の相互作用により腫れを誘発する可能性があります.
- シェール膨張がインサイトストレス進化に与える影響を理解することは,ストレスの正確な評価に不可欠です.
研究 の 目的:
- 刺激された貯水量 (SRV) 内のインシットストレスフィールドに対するシェール膨張の影響を調査する.
- シェールの膨張によって引き起こされるストレスの大きさと方向の変化を定量化するために.
主な方法:
- 液体の誘発による水分補給と腫れを確認するための実験的な腫れ検査.
- シェールガス井戸の断裂後のモデルを用いた数値シミュレーション.
主要な成果:
- シェイルの膨張は,SRV内の in situ ストレスフィールドを大幅に変化させ,ストレスの大きさと方向性に影響を及ぼします.
- 膨張の増加は,in situ ストレスを圧縮性から引力性へとシフトさせ,ストレス赤字と再分配を生み出します.
- 腫効果はSRV内に局在し,腫の度合いと多段階の骨折とともに強まります.
結論:
- シェイルの膨張は,断裂したシェイルの貯水池におけるin situストレス進化に影響を与える重要な要因です.
- シェールガス貯蔵庫におけるストレスの正確な評価は,膨張によって引き起こされるストレスの変化を考慮する必要があります.
- 複数の断裂段階における膨張の累積的な効果は,ストレス分布に重大な変化をもたらします.
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