土库曼斯坦阿姆河右岸和南约洛坦区块取心难点及个案分析

CORING DIFFICULTIES AND CASE ANALYSIS OF THE RIGHT SIDE OF AMU DARYA RIVER AND GUNORTA ELOTEN BLOCK IN TURKMENISTAN

长期以来,碳酸盐岩地层岩性破碎、易卡心磨心一直是该地层取心作业的瓶颈问题。土库曼斯坦取心作业平均单筒进尺达到13.79m,取心钻时最快获得了6m/h。文章就当前土库曼川庆钻探勘探区域取心的情况及取得的成绩作了简单扼要的介绍和总结,同时引用了各构造具有典型性的个井取心资料,重点突出了土库曼碳酸盐岩地层取心的复杂性和艰巨性,最后作者根据现场情况提出了增加取心硬件性能、强化取心软件措施、改良钻井液性能、产层段钻井理念合理化等建议,具有极高的参考和借鉴价值。

In a long time,core jamming and grinding are always the bottleneck problem occurring during coring in formation due to the fragility of carbonate rocks.The average footage of Turkmenistan coring operation is 13.79m and the fastest drilling speed is 6m/h.This paper gave a brief introduction and summary of the coring situation and achievement in Chuanqing drilling and exploration area of Turkmenistan.And it quoted data of single well coring with typical structures.It focused on the complication and arduousness of formation coring in the Turkmenistan carbonate rock.In the end,based on the on-site situation,some suggestions were put forward,such as increasing the coring hardware performance,strengthening the coring software measures,improving the drill fluid performance and rationalizing the drilling idea in production area.These suggestions are great references with high value.