The Research On High Temperature & Pressure Slim-hole Logging Instruments

The great demands for oil and natural gas have prompting the oil and gas exploration industry towards deeper strata exploring.Deep and ultra-deep drilling technology accelerates the process of finding new structures and new reservoirs in our new areas,new fields and new layers,especially deep oil and gas breakthrough,which maximumly meets the demands of oil and gas resources,verifies recoverable reserves as soon as possible,increases oil and gas reserves,achieves the goal of succeeding oil and gas,ensures national energy security.During “The Eleventh Five-Year” period,with the development of petroleum exploration in Sinopec and the introduction of 10 thousands drilling rigs,there are more and more deep and ultra-deep wells which design depth is more than 7000 meters.The technology requirements towards logging equipment of deep reservoir exploration mainly focus on the reliability and stability under high temperature and high pressure,which greatly increases the difficulty of log construction.The HTHP logging has become a worldwide problem in logging industry.The slimhole drilling technology has got lots of attention because of the ability that it improves the drilling effeciency of deep-complex lithology.In addition,the drilling technology of 4.5 int bit has a wide range of applications.However,the outside diameter of common downhole loging tools which can't apply to logging assesment in slimhohe usually exceeds or equal to 89 milimeters,in domestic.A few small-diameter and high-temperature equipments from abroad can't fit very well,for the long sevice period and high expense.Therefore,we need to develop the high-temperature and high-pressure small diameter(?70)series instruments at once,which satisfy requirements of the exploration and development in deep-complex reservoirs.The main research contents:the high-speed transmission unit of high-temperature and high-pressure small diameter(?70)instruments,Natural gamma logging instrument,digital acoustic logging tool,compensated neutron logging instrument,the dip-azimuth logging tool,slam adapter and dual lateral logging equipment.