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2014年勘探南方分公司按照战略展开焦石坝,外围甩开预探与评价的总体部署方案,在川东南探区共部署了焦页5井、焦页6井、焦页7井、焦页8井、永兴1井、隆盛3井等6口重点探井,目前6口井已招标启动。川东南地区地表条件复杂,山沟纵横,地表水埋藏浅,多溶洞裂缝发育,从前期一些井施工看,在上部地层钻遇大的暗河和溶洞,导致施工复杂。丁页1HF井在井深15米处钻遇溶洞,多次漏失导致导管施工达22天之多;焦页4HF井从22~95米钻遇裂缝,出现间断性恶性漏失,漏失泥浆1900方,损失时间达20天。为避免此情况
In 2014, according to the strategy, the South Branch of Exploration Company started the general deployment plan of pre-exploration and evaluation in accordance with the strategy. In the southeastern Sichuan exploration area, a total of 5 wells, such as Jiao page 5 well, Jiao page 6 well, Jiao page 7 well, 8 well, Yongxing 1 well, Longsheng 3 well 6 key exploration wells, the current 6 wells have been tender start. In the southeastern part of Sichuan Province, the surface conditions are complex, the width and width of the ravines are shallow, the surface water is shallow and the cracks in many caverns are developed. According to the construction of some wells in the early stage, large underground rivers and caves are drilled in the upper strata, resulting in complicated construction. Ding page 1HF wells in the well depth of 15 m drilling cave, multiple leaks lead to the construction of the pipeline up to 22 days; coke page 4HF wells from 22 to 95 meters drilling cracks, intermittent leakage occurred, the loss of slurry 1900 square, loss Time up to 20 days. To avoid this situation