Research and Application of Efficient Dropping-Fishing Cableless Separate Zone Injection Technology in Bohai Oilfield
When the conventional cableless intelligent water injection technology is applied in oilfield develop-ment,the insufficient circuit reliability of cableless intelligent working barrel and the short battery life often result in short service life of cableless injection string.In order to solve this problem,an efficient dropping-fishing cable-less separate zone injection technology was proposed.The developed downhole dropping-fishing cableless separate zone injection working barrel integrates the electronic components and sensor components of the cableless water in-jection working barrel in the dropping-fishing water injection mandrel,and uses the wireline operation to achieve rapid maintenance and replacement of the mandrel,effectively improving the service life of the string.Meanwhile,a matching ground code sending system and an efficient pressure wave control coding technology were developed.By means of the combination of software and hardware,seven major functions such as water nozzle opening regula-tion and flow rate preset were achieved,effectively improving the cableless regulation efficiency.This technology has been applied in 62 wells of the Bohai Oilfield up to now,with dropping-fishing success rate coming to 100%and water injection qualification rate of over 97%.This technology provides a new option for efficient and intelli-gent injection and production in offshore oilfields.
intelligent water injectionseparate zone injection technologycableless dropping-fishingpres-sure wavewater injection qualification rateBohai Oilfield
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维普
