Research and Application of Acid Soluble Tapping Screen Support Completion Technology
In order to solve the problem that the support completion string cannot pass through the broken zone in the Shunbei fault-controlled reservoir,an"acid soluble tapping screen"support completion technology tak-ing high torsional tubing,acid soluble tapping screen and high torsional hydraulic release as key technologies was developed.The designed high torsional tubing and releaser meet the requirements for the rotation and milling on the torsional resistance of string during RIH;the designed acid soluble tapping screen is completely sealed at initial state,the completion fluid can be circulated to the bit at bottom hole and meet the requirements of flushing bit dur-ing milling,while the screen becomes perforated screen after the soluble plugs have been dissolved by acid injec-tion,which meets the requirements of large displacement channel during reservoir transformation and production.By means of conducting a series of pressure bearing,salinity tolerance,alkali resistance and acid soluble tests,the reliability of the technology has been verified.Field application shows that the acid soluble tapping screen sup-port completion technology effectively solves the problem of difficult passage through the broken zone;and the in-position rate of support string is 100%in field application of 6 wells/times.This technology is simple,reliable and easy to operate on site;furthermore,compared with traditional technology,it improves time efficiency of single well by 53.6%and saves cost by 90.0%,so it provides reference for the selection of completion technology for other similar wells.
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