Research and practice of efficient plugging removal process in offshore oilfield B
The old offshore oilfield B is a heavy oil reservoir.With the continuous rolling development of the oilfield,and the comprehensive development of the large pump liquid extraction measures in recent years,the plugging mechanism of the oil well has gradually changed form the previous organic plugging to the organic and inorganic composite plugging.The composition of the plugging material was complex and structure was stable.The common plugging removal agent used cannot penetrate,which seriously restricts the effective removal of the complex plugging material in the heavy oil wells.Aiming at the plugging mechanism of different stages of oil wells,a multi-stage superpositon efficiency plugging removal technology was developed,which used a variety of plugging removal systems to synergize and released plugging removal components step by step to achieve the purpose of deep plugging removal.The technology had the characteristics of low cost,strong pertinence,good plugging removal effect and small fluctuation of flowback to the process,and had good promotion value.
offshore heavy oil reservoirsplugging removal systemmulti-stage superpositonefficiency plugging removal technology
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