东海X气田钻后M气藏地震振幅特征分析及认识
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摘要
X气田位于东海南部西部凹陷带,主要分布于2200~2800m的古近系古新统明月峰组中孔中低渗的砂岩储层中。M气藏是常规气藏,也是该气田的主力气藏之一。钻后通过AVO模拟及实钻资料统计与分析,证实气区强振幅的形成与气藏分布密切相关。进一步通过正演模型,研究了气藏厚度与地震振幅的强弱变化之间的关系,以及"亮点"分布范围与实际气藏面积之间的对应关系。通过上述研究及认识,可以有效地指导该气田气藏预测及地质储量计算工作。
The X gas-field is located in the western sag in southern part of East China Sea.The main gas layers are distributed in the sandstones with medium porosity and penneability,belonging to Mingyuefeng Formation of Palaeocene and with a depth range from2 200 m to 2 800 m.M gas reservoir is normal reservoir,and the main gas reservoir of this gas filed.It has been confirmed through post-drilling AVO modeling and statistic analysis of drilling data that high-amplitude is highly related with distribution of gas reservoir.By forward modeling,a study has been done about the relationship between gas reservoir thickness and seismic amplitude,and the corresponding relationship between the distribution range of spot area with practical gas area.Through the above study,the forecast of gas reservoir and calculation of geological reserves of the gas-field can be done effectively.
The X gas-field is located in the western sag in southern part of East China Sea.The main gas layers are distributed in the sandstones with medium porosity and penneability,belonging to Mingyuefeng Formation of Palaeocene and with a depth range from2 200 m to 2 800 m.M gas reservoir is normal reservoir,and the main gas reservoir of this gas filed.It has been confirmed through post-drilling AVO modeling and statistic analysis of drilling data that high-amplitude is highly related with distribution of gas reservoir.By forward modeling,a study has been done about the relationship between gas reservoir thickness and seismic amplitude,and the corresponding relationship between the distribution range of spot area with practical gas area.Through the above study,the forecast of gas reservoir and calculation of geological reserves of the gas-field can be done effectively.
引文
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[1O]涂齐催,何贤科.东海油气田中、深层气藏AVO模拟与识别方法研究及应用[J].海洋石油,2013,33(1):49-53.
[2]杨新菊,马建德.AVO正演模型研究及应用[J].海洋石油,2006,26(3):14-19.
[3]郝晓红,王闯.流体替代技术及应用分析[J].海洋石油,2008.28(3):1-5.
[4]张文,李维新..AVO交汇图分析技术的应用[J].中国海上油气,2002,16(4):286-290.
[5]涂齐催,刘江.AVO与流体替换相结合识别深层I类气藏[J].海洋石油,2011.31(2):25-28.
[6]陈颙,黄庭芳.岩石物理学[M].北京:北京大学出版社,2001:100-134.
[7]Joel D.Walls等.利用岩石物理性质、地震属性、神经网络描述北海储层的特征:一项实例研究[J].黄子齐.译.海洋石油,2001(2):66-69.
[8]涂齐催,张雷.砂岩孔隙度对地震反射影响的模型研究[J].中国海卜油气.2013,25(4):22-25.
[9]张永江,轩义华.岩石物理分析在番禺天然气区含气性研究中的应用[J].石油物探,2010,49(4):407-414.
[1O]涂齐催,何贤科.东海油气田中、深层气藏AVO模拟与识别方法研究及应用[J].海洋石油,2013,33(1):49-53.
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