套管短口袋技术的应用探讨

介绍了短口袋技术可以提高固井质量及避免钻井掉块等优点,阐述了保证井身质量优良、井底少沉沙、套管长度与井眼深度的一致和套管居中等使用短口袋的技术要求.通过该技术在埕北古A井的应用,说明优选钻具组合和钻进参数,使用优质钻井液、通井和套管居中等技术措施可以满足要求,并成功地实现套管短口袋.

Discussion on Setting Casing Shoe near the Bottom of Hole

In this paper, the advantage of setting casing shoe near the bottom of hole is introduced. This technique can improve ce- menting quality and avoid borehole wall collapsed during drilling. In addition, the technical requirements for setting casing shoe near the bottom of hole have been put forward in order to assure high quality wellbore, cleaned up of bottom hole, casing centralized, and the length of casing string is the same as borehole depth. Setting casing shoe near the bottom of hole has been applied successfully in Well Chengbeigu A, and the results indicated that BHA optimization, good mud property, wiper trip for running casing and making casing centralized are effective measurements for setting casing shoe near the bottom of hole.