Li Shengli, Wu Taiping, She Meiqing. NEW APPLICATION OF UNDERBALANCE EFFECT TO OILFIELD[J]. Oil Drilling & Production Technology, 2002, 24(2): 61-63. DOI: 10.3969/j.issn.1000-7393.2002.02.020
Citation: Li Shengli, Wu Taiping, She Meiqing. NEW APPLICATION OF UNDERBALANCE EFFECT TO OILFIELD[J]. Oil Drilling & Production Technology, 2002, 24(2): 61-63. DOI: 10.3969/j.issn.1000-7393.2002.02.020
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NEW APPLICATION OF UNDERBALANCE EFFECT TO OILFIELD

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  • Some four patents basis on underbalance effect principle, such as formation plug removal by underbalance effect (FPRUE), press reducing for acid drainage as tube no moving (PRAD), press reducing with add heat water on wellhead (PRAHWW) and underbalance effect for sludge drainage (UESD) in sewage sank, were mainly introduced. Secondary time formation damage would not be caused in the measures of FPRUD and PRAD. The period between two times repairing was prolonged as press reducing with add heat water on wellhead, the consumption of heat water was decreased. The period about washing tank was prolonged and the quality of water was improved by UESD. Field application in 230 wells show all technologies have better affect.
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