保护裂缝性碳酸盐岩油气藏的钻井完井液

Drilling fluid and completion fluid for protecting fractured carbonate rock reservoir

根据对碳酸盐岩储层岩性、物性和敏感性的分析，室内优化了一套保护裂缝性碳酸盐岩储层的ＭＭＨ正电胶钻井完井液，并对碳酸盐储层的水锁效应及应力敏感性进行了评价。室内及现场实际井浆的分析结果表明，该配方对裂缝性碳酸盐岩储层具有良好的保护效果。文中还对ＭＭＨ 正电胶钻井液保护裂缝性储层的机理进行了分析。

Through analysis of lithology,physical characteristics and sensitivity for carbonate reservoir,MMH drilling / completion fluids for protecting fractured carbonate rock reservoir are developed.Water lock effect and stress sensitivity of carbonate reservoir is evaluated.Analysis result of indoor and field drilling fluid shows that MMH drilling fluid and completion fluids have good protecting result to fractured carbonate rock reservoir.Meanwhile,the mechanism of MMH drilling fluid protecting fractured reservoir is analysed.