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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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油气藏烃类垂向微渗漏及近地表化探异常的油气地质意义油气藏烃类垂向微渗漏及近地表化探异常的油气地质意义
Keywords: 化探,异常,油气地质意义,微渗漏,油气藏
Abstract:
？结合渤海湾盆地临南断块油气藏、塔里木盆地雅克拉凝析气藏等研究区石油地质资料，从油气藏成藏特征、化探异常空间分布规律入手，探讨烃类垂向微渗漏的方式及受控因素，研究化探异常与油气藏烃类垂向微渗漏的“成因”联系，分析和认识化探异常的油气地质意义。夏口断层在临南断块油气藏成藏系统中具备油气侧向运移“封堵”特征，而研究区化探异常则揭示了夏口断层(裂隙）具有油气纵向“渗漏通道”作用，由此表明夏口断层具备油气侧向运移相对“封堵”和油气纵向绝对“渗漏”的双重属性特征。雅克拉气藏区化探异常围绕着气藏构造高部位(化探指标低值区)呈环状形式分布于气藏边缘，表明气藏盖层明显控制了气藏烃类垂向微渗漏和化探异常的空间分布特征；重烃指标异常空间分布规律与气藏盖层封闭性的横向变化规律具有较为一致的对应关系，表明气藏盖层封闭性对油气重烃微渗漏的影响较甲烷微渗漏影响更为明显。2个研究区近地表化探异常特征与其对应的油气藏成藏特征、油气垂向微渗漏等存在极为密切的联系。
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