平湖油气田低渗透储层测井评价研究

平湖油气田P11储层开发是平湖油气田增储提产的重要目标,也是当前平湖油气田开发面临的难题之一。由于埋藏深,储层物性条件差,试油自然产能低下,储层流体性质复杂,气油比低,凝析油含量高,密度大,储层温度高,压力系数高,给测井解释和评价带来很大困难,对开发方案的实施提出了挑战。根据岩心分析资料,从成岩作用、沉积作用等方面对平湖组放鹤亭P11储层低渗原因进行了分析;对P11储层的测井响应特征进行了总结,对P11储层＂四性＂关系、孔隙度结构进行剖析,对储层孔隙度、渗透率、饱和度等参数进行了研究,得到一套适合P11储层测井解释评价的方法,为P11储层的开发提供参数依据和测井解释服务。

Research on log evaluation of low-permeability reservoir in Pinghu Oil and Gas Field

The development of P11 reservoir is not only an important objective for reserves stimulation,but also one of the current difficulties faced with in the development of Pinghu oil and gas field.Due to its deep burial depth,poor reservoir physical properties,low natural deliverability,complex fluid property,high reservoir temperature and pressure coefficient which brought great difficult to log interpretation and evaluation,the implementation of this development plan has been challenged.Based on the core analysis data,the causes of low permeability reservoirs for P11 has been analyzed in terms of diagenesis and sedimentation,the logging response characteristics has been summarized,and the relationship of reservoir pore structure,permeability,saturation and other parameters have been studied which helps us to obtain a methodology of log interpretation and evaluation,and provide a reliable data and log evaluation for the development of P11 reservoir.