冀中马西洼槽东沙河街组深部地层的硬脆性泥页岩,钻井施工中极容易出现井壁失稳情况;通过防塌机理的研究结果证实,对硬脆性泥页岩的防塌的关键是对其所具有的微裂缝进行有效封堵。根据上述结果确定的井壁稳定技术,在钻井过程中起到了防止井壁垮塌的作用。 The hard and brittle shale in the deep strata of the Dongshahejie Formation in the Muxi depression of the Jizhong Basin is prone to the instability of the borehole wall during drilling. Based on the study of the collapse prevention mechanism, it is confirmed that the anti-collapse of hard and brittle shale The key is to effectively seal the microcracks it has. According to the above results, the wellbore stabilization technology has played a role in preventing the collapse of the wellbore during drilling.