三维地震二次采集工作量储量发现效应分析
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摘要
在资源条件逐年变差、勘探开发难度日益加大的条件下,加大三维地震二次采集工作力度是各油田企业确保增储上产的重要举措。以国内部分油田若干区块的勘探工作量投入及新增探明地质储量为样本,分别建立线性和非线性模型,对油田三维地震二次采集工作量对储量发现的贡献进行评价。线性模型的不足之处在于缺乏截距项,以非线性模型评价结果为基础,模拟测算三维地震二次采集、其他环节工作量投入以及资源条件对储量发现的贡献权重。研究发现,三维地震二次采集对储量发现的贡献程度是显著的,基本维持在40%～55%的区间,不同油田三维地震二次采集对储量发现的贡献权重不尽相同。建议各油田在今后应认真研究勘探工作量和资源条件的产出差异,根据以往的储量发现规律,以资源条件为导向,优化工作量投入结构,实施差异化勘探发展战略。
To emphasize the secondary 3D seismic acquisition has become an important measure to increase reserves and to put on production for oilfields under poor resources and difficult exploration and development conditions.Using the seismic work and increased reserves in a number blocks of some China oilfields as the samples,a linear model and a nonlinear model are built to evaluate the contribution of the secondary 3D seismic acquisition to reserves addition.The absence of intercept form is a deficiency of the nonlinear model,and the contribution weights of the secondary 3D seismic acquisition,other exploration works and resources conditions to reserves addition are modeled and calculated respectively on a basis of the results from the linear model evaluation.It has been found that the secondary 3D seismic contribution to reserves addition is quite great and largely at 40%-55%,with its weight different in various fields.Therefore,it is recommended that each field should optimize work structures of exploration and development and conduct a differential exploration and development strategy in the future,by careful researching differences of exploration work and resources,learning from past experiences of reserves addition and using resources conditions as a direction.
To emphasize the secondary 3D seismic acquisition has become an important measure to increase reserves and to put on production for oilfields under poor resources and difficult exploration and development conditions.Using the seismic work and increased reserves in a number blocks of some China oilfields as the samples,a linear model and a nonlinear model are built to evaluate the contribution of the secondary 3D seismic acquisition to reserves addition.The absence of intercept form is a deficiency of the nonlinear model,and the contribution weights of the secondary 3D seismic acquisition,other exploration works and resources conditions to reserves addition are modeled and calculated respectively on a basis of the results from the linear model evaluation.It has been found that the secondary 3D seismic contribution to reserves addition is quite great and largely at 40%-55%,with its weight different in various fields.Therefore,it is recommended that each field should optimize work structures of exploration and development and conduct a differential exploration and development strategy in the future,by careful researching differences of exploration work and resources,learning from past experiences of reserves addition and using resources conditions as a direction.
引文
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