【摘要】 大港板桥凝析油气田板二油组是一套重力流水道沉积的薄砂岩储气层,砂体横向变化快,连续性差,利用常规方法难以精细预测含气单砂体展布。以该区为例,介绍地震反演与三维地质建模结合的含气单砂体精细预测技术。根据研究区地质特征及研究目的,随机反演泥质体积分数模型;然后,将地震解释与单井分层结合建立三维构造模型,在此基础上以测井数据为硬数据,以地震反演的泥质体积分数模型作为协同变量,采用序贯高斯同位协同算法相控建立储层三维泥质体积分数模型;继而分析含气单砂体物性特征,用物性截断的方法预测含气单砂体三维展布。预测结果与后期钻井高度吻合,满足了生产开发阶段油气藏描述的需求,应用这种技术可以有效提高薄储层油气田单砂体预测的精度。更多还原

【Abstract】 Ban 2 oil measures are a set of thin sandstone gas reservoirs deposited in gravity flow environment in Banqiao condensated oil-gas field in Dagang.Lateral change of sandbody is quick and the continuity is poor.Because the utilization of conventional method is difficult to predict the distribution of single gas-bearing sandbody,three-dimensional distribution of single sandbody is an urgent problem to be resolved at development stage.This paper introduces the accurate prediction of single gas-bearing sandbody combined seismic inversion with three-dimensional geological modeling,taking the area as an example.Shale content model inversion is conducted by the geologic features of the area and study aim.Then we create the three-dimensional structural model,combined seismic interpretation and single well layering.Based on well logging data,three-dimensional shale content model is established in terms of the collaborative algorithm of sequence Gauss coordination,taking the seismic inversion shale content model as cooperative variation.Physical property features of single gas-bearing sandbody are analyzed and the three-dimensional distribution of single sandbody is predicted through the use of physical property breaking method.The predicted result is in agreement with the drilling result at later stage,which satisfies the need of reservoir characterization at development stage.The application of this technique can improve the single sandbody prediction accuracy in thin-reservoir oil-gas field.更多还原