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Mechanical water plugging stratified mining the oilfield development process , an important measure , is also a correct understanding of one of the primary means of formation . The process has the adaptability, low cost, quick , etc. , play an important role in stabilizing oil in water control . However , traditional mechanical water plugging process there are insufficient : water , water control process conducted separately ; find water shut-off construction after adjusting layer required again on the job , the job number , the construction of a large amount of oil well production rate is low . To solve the above problem , through the analysis on the the Huabei Oilfield layered oil production technology status , drawing on the advantages of layered oil extraction technology at home and abroad , developed Huabei Oilfield Fixed column for- layer oil extraction technology , including for- layer process column supporting tools screening and group development with fixed column for layer production , finding water , the card number of process combinations such as water , a trip to the column operating at the same time , saving operating costs , improve oil well production aging ; the accuracy and success of the conversion layer developed a new downhole switching state identification system, using the method of comprehensive testing of the flow pressure , and judgment on the identification of the operating state of a downhole switching converter forward , to ensure that the conversion layer production rate. The technology on-site construction of 13 wells , the the construction success rate of 100 % , the cumulative change layer 14 wells , change layer 100% success rate . Field tests show that the technical design , underground switches and supporting tools reliable ; process has excellent water function to find water and card , can accurately determine the water layers , and can be repeated for layer , with a strong field application value.
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