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1998年 11月 ,胜利油田王家岗地区的第一口发现井 (WX119井 )在埋深 2 5 0 0～ 30 0 0 m的沙河街组沙四段砂岩中发现了高产工业油气流 ,随后如何进一步确定含油砂体展布范围和空间厚度变化成为对油藏作进一步评价和开发的关键。在研究区仅有 4口井的情况下 ,利用基于道的稀疏脉冲三维地震反演方法确定了含油砂体的分布范围及厚度变化 ,据此部署的 3口评价井和 1口探井都获得了高产工业油气流。根据与已知含油砂体的波阻抗特征的类比 ,对没有钻探的高阻抗区进行钻探以使含油气范围不断扩大。钻井数达 30口 ,其中仅 2口井失利。为了进一步搞清含油砂体分布范围 ,我们采用了基于地质模型的三维地震反演 ,对所钻遇的油层分布进行了预测 ,分析了失利井的原因 ,提供了新的钻探目标 ,并为开发井的部署提供了有利的地质依据
In November 1998, the first discovery well (WX119) in the Wangjiagang area of Shengli Oilfield discovered high-yield industrial oil and gas flows in sandstones of Shahejie Formation of Shahejie Formation with a depth of 2500 to 3000 m Determining further the distribution range and spatial thickness of oil-bearing sand bodies becomes the key to the further evaluation and development of oil reservoirs. In the case of only 4 wells in the study area, the distribution range and thickness variation of oil-bearing sand bodies were determined by using the channel-based 3-D sparse-pulse seismic inversion method. The 3 evaluation wells and 1 exploration well deployed were obtained High-yield industrial oil and gas flow. Based on an analogy with the wave impedance characteristics of known oil-bearing sand bodies, high-impedance zones that are not drilled are drilled so that the hydrocarbon-bearing range is continuously expanded. Drilling up to 30, of which only 2 lost. In order to further understand the distribution range of oil-bearing sand bodies, we use 3D seismic inversion based on geological models to predict the distribution of the oil layers encountered, analyze the reasons for the failed wells, provide new drilling targets, Well deployment provides a favorable geological basis