渤海A油田气烟囱识别及其研究意义

The identification of gas chimney in Bohai A oilfield and its implications

气烟囱是一种特殊的地质现象,与油气的生成、运移密切相关。在地震资料上进行气烟囱的识别研究有助于工区的断层封闭性、油气运移通道、成藏模式的研究。基于倾角数据体的气烟囱识别技术引入倾角和方位角信息,结合有监督的神经网络分析方法,提取出能够反映气烟囱地震异常体的地震属性组合,完成了对气烟囱的识别研究,相对以往方法,该方法具有识别准确度高、效率快的优点。此方法运用于渤海A油田,较好地完成了油田的油气运移及成藏模式分析,为油田的储量增长奠定了基础。同时,对渤海A油田断层的封闭性进行了风险分析和提示,保证了油田的钻井安全。

Gas chimney is a special geological phenomenon which is closely related to oil and gas generation and migration. The gas chimney recognition research on the seismic data contributes to the fault sealing,hydrocarbon migration and accumulation mode research. The gas chimney identification technology based on steering cube uses the dip and azimuth information for the identification of gas chimney. Combined with a supervised neural network analysis method,the technology extracts the seismic attribute combination which can reflect the prominent gas chimney seismic anomaly body. Compared with the previous method,this method has the advantages of high accuracy and efficiency. This method was applied to the Bohai A oilfield,and the research on the field hydrocarbon migration and accumulation mode was preferably completed,which laid the foundation for the growth of oil reserves. In addition,the authors conducted the risk analysis of the closed fault in the Bohai A oilfield,thus ensuring the drilling safety.