Calibration Technique And Device Development Of Logging Depth System

The accuracy and reliability of logging depth system is very important for obtaining high-quality log data.It will also directly affect the later development effect and reservoir description of oil and gas well.The well logging depth system is calibrated by a standard well for logging in Tarim Oilfield.The oil and gas wells in the Tarim Oilfield are buried deep and over 60% of the oil and gas wells are over 6000 m.At present,the Well-LN13,the standard well for logging of the Tarim Oilfield,can not be calibrated for the depth of the well logging depth of only 4750 m.It is urgent to build a new super deep standard well for logging with a depth of more than 6500 meters.In addition,in actual production operation,once the logging depth and engineering depth are error,it is not yet able to confirm the production error at the production site or log depth calibration at production site.In view of the actual production of the above two questions about the depth of the well logging system calibration,this paper mainly studies how to choose from abandoned Wells in tarim oilfield well built a optimum target,study how to carry out new ultra deep well logging standards well feasibility analysis,research how to accurately to Well-LN13 in area of tarim oilfield logging in active service standard well the depth of the transfer to new logging standard well,study standard transmission scheme and technical requirements of the well logging depth,complete the establishment of the new super deep well logging standard well depth.At the same time,the system of collecting and logging depth calibration methods,the depth of the well logging system structure and performance index of the calibration device,collect related field the most advanced speed measuring technology,combined with logging actual conditions,systematic analysis research.A set of applicable to the production site of grading non-contact precision of logging cable,continuous depth measuring the depth of the calibration device,and in the standard well and production well logging experiment contrast analysis respectively.Finally,the standard well of the Tarim ultra deep well was built,and the standard value of the well logging standard of the ultra deep well in Tarim Oilfield was formed,and the depth calibration device that could be used for production site to calibrate the logging depth was built.At the same time,a set of specification for logging depth calibration for Tarim Oilfield is set up.