Method and system for selecting well drilling anti-leakage plugging material for deep crack leakage formation

• Main Authors: DENG SONG, HUO BINGZHAO, LI CHAOWEI, LI QIU, YAN XIAOPENG, HAO HONGDA, LIU CHENGGUO, XU MINGHUA, WANG JIANGSHUAI, SHI LIN
• Format: Patent
• Language: Chinese; English
• Published: 19.01.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a method and a system for selecting a drilling leakage-proof plugging material for a deep crack leakage formation. The method comprises the following steps: acquiring the size of a leakage formation crack and the mechanical property of a tip area of the leakage formation crack, and establishing a crack plugging system physical model according to acquired data; crack closing stress is applied to the plugging layer module in the crack width direction, then positive pressure difference continues to be applied in the crack length direction, crack closing stress of a preset round is applied in the crack width direction, and the preset round is determined according to the round of pressure fluctuation in the drilling process; and the maximum fracture extension amount of the fracture tip module after the operation is obtained, the fracture tip extension coefficient is calculated, and deep fracture leakage formation well drilling leakage prevention and plugging material selection is achieved.