车排子凸起新近系岩性油藏识别配套技术
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摘要
通过利用多种地震技术对车排子凸起的新近系沙湾组含油砂层进行了储层研究,认为沙湾组顶部滨浅湖滩坝微相是有利储层;沉积相剖面上表现为从下伏扇三角洲进入湖泊相的过渡处,具有良好的储盖组合。地震相为大套空白(弱)反射的下部短轴状强振幅,亮点特征清楚;地震属性振幅也表现出了一定的异常;从油气检测分析,砂体含油之后,明显具有频率振幅异常的特征;AVO显示出含气砂岩底界明显的振幅异常;根据上述一系列特征对含油砂层的展布特征和大致规模进行了预测,根据预测结果所钻探的井获工业油流。表明多种地震配套技术能够降低解释的不确定性,提高钻探成功率;并且这种方法具有一定的推广意义。
Based on the study of hydrocarbon reservoir by applying various seismic techniques in the Neogene Shawan Formation of Chepaizi Swell. It was considered that the favorable reservoirs were the lake shore subfacies and shallow lake subfacies at the top of Shawan Formation.During the research,the sedimentary facies transition in this area changed from the underlying fan-delta facies to the lacustrine facies with effective reservoir-caprock combination. The features of Seismic facies included large sets of blank (weak) reflection of the short axis shape,strong amplitude,distinct bright spot features,seismic amplitude attributes also showed abnormal amplitude. Both frequency and amplitude of the hydrocarbon reservoirs are obviously abnormal in the bottom of oil-bearing sandstones indicated by AVO analysis. According to the mentioned result,wells drilled obtain industrial oil flow. It is pointed out that the corollary techniques can be used to reduce the uncertainty of interpretation,improve the success ration of well drilling,the method is wealthy to be introduced to the oilfields.
Based on the study of hydrocarbon reservoir by applying various seismic techniques in the Neogene Shawan Formation of Chepaizi Swell. It was considered that the favorable reservoirs were the lake shore subfacies and shallow lake subfacies at the top of Shawan Formation.During the research,the sedimentary facies transition in this area changed from the underlying fan-delta facies to the lacustrine facies with effective reservoir-caprock combination. The features of Seismic facies included large sets of blank (weak) reflection of the short axis shape,strong amplitude,distinct bright spot features,seismic amplitude attributes also showed abnormal amplitude. Both frequency and amplitude of the hydrocarbon reservoirs are obviously abnormal in the bottom of oil-bearing sandstones indicated by AVO analysis. According to the mentioned result,wells drilled obtain industrial oil flow. It is pointed out that the corollary techniques can be used to reduce the uncertainty of interpretation,improve the success ration of well drilling,the method is wealthy to be introduced to the oilfields.
引文
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[3]陈立官.油气测井地质[M].成都:成都科技大学出版社,1990.18~72.
[4]马正.油气测井地质学[M].武汉:中国地质大学出版社,1994.18~72,33~45.
[5]欧阳健,施发祥.测井地质学在油气勘探中的应用[M].北京:石油工业出版社,1991.180~244.
[6]A.R布朗.三维地震资料解释[M].北京:石油工业出版社,1996.18~72,33~45,40~48.
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