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夏42-斜2井是在玉皇庙地区夏42断块构造高部位上的一口滚动井,在东二段底部和沙一段底部均有火成岩裂缝性地层,地层压力系数较低(不超过1.08),钻进中极易发生井漏,固井时易发生水泥浆漏失,导致固井施工失败。夏42-斜2井采取反常规固井作业,不再僵化地坚持“先堵漏再固井”的传统方案,而是采用低密度水泥浆固井技术,配合全井换轻质钻井液的技术,并采用以下现场技术措施:以完钻循环钻井液排量作为固井施工中替浆排量的上限,避免因排量过大压漏地层;优化水泥浆初凝时间和初凝到终凝的过渡时间,使水泥浆填充到位后快速达到凝胶强度,保证了固井施工一次成功。封固质量优良。
Xia 42-Xie 2 well is a rolling well on the tectonic high part of Xia 42 fault block in Yuhuangmiao area. There are igneous fractures in the bottom of East Second Member and the bottom of Sha First Member. The formation pressure coefficient is low (less than 1.08) , Drilling is extremely prone to leakage, easy to cementing cement leakage loss, leading to cementing failure. Summer 42-inclined 2 wells to take anti-conventional cementing operations, will not rigidly adhere to the “plugging and then cementing,” the traditional program, but the use of low-density cement slurry cementing technology, with the whole well for light drilling fluid Technology, and the following on-site technical measures: Drilling drilling fluid circulation drilling fluid displacement as the cement displacement in the upper limit, to avoid excessive discharge pressure due to the formation; to optimize the initial setting time and initial setting of cement slurry to the end Condensation of the transition time, so that after the filling of cement slurry in place to quickly reach the gel strength, to ensure a successful cementing construction. Good sealing quality.