CAJ | 학술논문

塔中11井钻遇了两个漏层和一个高压层，同一裸眼内存在多个不同的压力系统。钻井复杂使得钻井液性能变差，钻井液携砂性变差、滤饼摩阻增大增加了发生卡钻事故的概率。钻井过程中发生了2次卡钻事故，由于卡钻地层为碳酸盐岩储层，借鉴试油、修井的酸化技术来解除卡钻事故。实践表明，泡酸解卡工艺是一种解除碳酸盐岩储层卡钻行之有效的方法，还利于储层保护，但能否在大漏失、高套压、高含硫油气井运用及泡酸解卡对后续作业有何影响，需要进一步分析研究。
탑중11정찬우료량개루층화일개고압층，동일라안내존재다개불동적압력계통。찬정복잡사득찬정액성능변차，찬정액휴사성변차、려병마조증대증가료발생잡찬사고적개솔。찬정과정중발생료2차잡찬사고，유우잡찬지층위탄산염암저층，차감시유、수정적산화기술래해제잡찬사고。실천표명，포산해잡공예시일충해제탄산염암저층잡찬행지유효적방법，환리우저층보호，단능부재대루실、고투압、고함류유기정운용급포산해잡대후속작업유하영향，수요진일보분석연구。
Well Tazhong-11 encountered two leakage zones and one high pressure zone, and there were several different pressure systems in one open hole. The drilling complexities made the drilling lfuid properties become poor, and the deterioration of sand carrying property of drilling lfuid and increase of iflter cake drag increased the probability of occurrence of pipe sticking. Pipe sticking occurred two times during drilling. The sticking formation was carbonate reservoir, so the acidization technique which is used in oil test and downhole service was used to release the pipe sticking incident. Practice shows that the technique of acid soaking to release stuck pipe is an effective means of releasing pipe sticking in carbonate reservoirs, and it is also favorable for reservoir protection and has good economic beneifts and high technical feasibility. But further analysis and research need to be conducted to its use in oil/gas wells with large leakage, high casing pressure and high sulphur content and the effects of acid soaking to release stuck pipe on subsequent operations.