Difficulties and Countermeasures of Drilling Logging Operations under High Temperature Conditions
In recent years,with Bohai Oilfield gradually moving towards deep layer,deep and ultra-deep layer will become the main battlefield of exploration and development,and the demand for high temperature LWD(logging while drilling)tools is also gradually increasing.However,some high-end LWD tools cannot meet the needs of high-temperature operation,which brings great challenge to LWD data acquisition under high temperature conditions.In this paper,by adjusting the operation idea,the circulating while drilling mode is adopted for the well section higher than 130℃,and the lower measurement mode is applied to record the logging data.The wells with the temperature higher than 175℃are cooled by mud cooling system.This method has achieved good application results in Bohai Oilfield,which solves the data acquisition problem of normal temperature LWD tool under high temperature operation conditions,and has a very broad application prospect.
high temperature welllogging while drillingdata acquisitionmud cooling
万方数据
维普
