Research and application of gauge-protected drilling plug technology in casing damage well treatment
The large-scale development and adjustment of offshore oil and gas fields has induced a dramatic increase in casing damage wells,and many wells in Bohai Bay have had casing scraping or collision due to geological and engineering influences.After casing damage wells are plugged by squeezing cement slurry,casing window opening or wellbore loss easily caused by drilling plug and a difficult construction both form technical problems restricting the repair of casing damage wells.Combined with the characteristics of gauge-protected and directional reaming technology and directional channeling in casing damage wells technology,the gauge-protected drilling plug technology in casing is proposed to effectively solve the problems above.This paper takes Well X97 as an example and determines the combination type,drill collar length and construction parameters of the drilling pipe string.The risk of window opening and the difficulty in casing damage well drilling are avoided and solved respectively after applying the calculation results in the field.It verifies the feasibility of the gauge-protected drilling plug technology and offers a reference to other conditions in casing damage wells.
万方数据
维普
