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四川盆地碳酸岩裂缝性气藏勘探开发主要分布在川(渝)东北部地区20余县,勘探面积近6万平方公里,大部分为高陡构造。由于复杂的构造应力作用,倾角变化大,钻遇断层、裂缝、溶洞多,井漏频繁,井漏的深度从表层到3000米,漏层地层压力梯度大多低于静水柱压力,采用了多种堵漏治漏方法和措施,效果并不理想,严重制约了钻井工程进度,造成巨大经济损失。东安1井、罗家3井、天东89井等井因溶
The exploration and development of carbonate fractured gas reservoirs in Sichuan Basin are mainly distributed in more than 20 counties in northeastern Sichuan (Yu) with a exploration area of nearly 60,000 square kilometers, most of which are steep and steep structures. Due to the complicated tectonic stress, the dip angle changes greatly, drilling more faults, fractures and karst holes with frequent well leakage. The depth of the well drain is from 3000 meters to the surface and the strata pressure gradient in the strata is mostly lower than the hydrostatic pressure. Leakage leakage methods and measures, the effect is not satisfactory, seriously hampered the progress of drilling projects, resulting in huge economic losses. Dong’an Well 1, Luo 3, Well East Tung 89 wells due to dissolution