半潜式平台长筒取心的应用

Application of long barrel coring for semi submersible platform

中长筒取心是常规取心技术的进一步提高与发展,它是一次取心长度在两个单根以上的取心作业,通常只有当地层岩石的胶结性与可钻性较好时才使用中长筒取心。本口取心井是东海海域的一口评价井,因A层段无参考地质岩心,为探明此井段气田储量规模,要求在A砂层全井段取心,岩心全部取在气层井段。本次选用高强度川7-4取心工具,完成八回次取心作业,总进尺149.03m,岩心总长146.80m,岩心平均收获率98.50%,圆满完成取心任务。

It is a further improvement and development of conventional coring technology,It is usually used to take long cores only when two cores are drilled.This coring well is an evaluation well in the East China Sea,In order to find out the reserve scale of the gas field in this well section,coring is required in the whole well section of sand layer a,and all cores are taken in the gas reservoir section.This time,high-strength chuan7-4 coring tools were selected to complete eight coring operations,The total footage is 149.03 meters,the total core length is 146.80 meters,and the average core recovery rate is 98.50%.