Technology and Application of Increasing Drilling Speed and Efficiency in Beibu Gulf Basin
Beibu Gulf Basin is rich in oil and gas resources,but the stratigraphic structure is scattered,and is characterized by developed faults,complex ground stress,high formation collapse pressure,developed granite with high compressive strength.Drilling is faced with such problems as frequent well positions conversion,for-mation collapse and leakage,difficulty in offshore oil-based drilling cuttings treatment,low penetration rate of granite machinery,and low wells abandonment efficiency of long open hole.The"one hole and two eyes"ex-ploration mode,wellbore structure optimization technology,offshore oil-based drilling cuttings treatment tech-nology,new composite impact drilling speed increasing technology,one-time cement plug abandonment technol-ogy in long open hole section,cement umbrella suspended cement plug technology and other efficiency improve-ment and speed improvement measures were adopted in order to further reduce drilling cycle and operating costs.It has effectively solved the drilling problems in the western waters of the South China Sea,and has achieved re-markable results in practical application,improving the exploration aging and drilling speed,and providing a ref-erence for improving the speed and efficiency of drilling in the same type of oil and gas fields.
western South China Seaexploration wellincrease speed and efficiencyoil-based drilling cut-tingswell body stucturecomposite impactorcement umbrella
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