火14井北断块火山岩推覆体掩伏构造成图技术
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摘要
火14井北断块构造位于准噶尔盆地东部隆起沙帐断褶带北端,目的层为二叠系平地泉组,主体处于石炭系火山岩逆掩推覆体之下,由于受上覆不等厚火山岩高速层的影响,该断块内二叠系层速度横向变化快、干扰波发育、地震资料品质差。复杂的速度变化制约了对断块内构造形态的认识及该区油气勘探的突破。对此,分别采用地质模型正反演技术分辨出了火山岩体其展布和接触关系,在此基础上,分析其波形及属性特征,落实了火山岩推覆体掩伏构造形态和构造高点,同时用变速成图技术提高了构造成图精度。
Well Huo14 north fault block is located in north side of Shazhang bruchfalten zone in Eastern uplift of Junggar basin.The target interval is the Permian Pingdiquan formation,the main part is generally beneath the carboniferous volcanic overthrust nappe.Affected by the overlying unequal thickness volcanic high-speed zone,the Permian in this block is of characteristics of fast change of lateral interval velocity,developing interference wave and poor quality of seismic data.So the complex velocity changes restrict understanding of structural features within the block and technological breakthrough in oil-gas exploration in this area.In this paper,the volcanic rock body,its distribution and contact relationship are distinguished using the forward and inversion techniques of geological model,based on which by analyzing the waveform and attribute characteristics,the volcanic overthrust nappe structural shape and highs are defined.Meanwhile,using velocity-varied mapping technique improves the structural mapping accuracy.
Well Huo14 north fault block is located in north side of Shazhang bruchfalten zone in Eastern uplift of Junggar basin.The target interval is the Permian Pingdiquan formation,the main part is generally beneath the carboniferous volcanic overthrust nappe.Affected by the overlying unequal thickness volcanic high-speed zone,the Permian in this block is of characteristics of fast change of lateral interval velocity,developing interference wave and poor quality of seismic data.So the complex velocity changes restrict understanding of structural features within the block and technological breakthrough in oil-gas exploration in this area.In this paper,the volcanic rock body,its distribution and contact relationship are distinguished using the forward and inversion techniques of geological model,based on which by analyzing the waveform and attribute characteristics,the volcanic overthrust nappe structural shape and highs are defined.Meanwhile,using velocity-varied mapping technique improves the structural mapping accuracy.
引文
[1]帕尔哈提,邵雨,徐群洲,等.准噶尔盆地复杂地区高精度构造成图方法[J].石油地球物理勘探,2009,44(3):331-336,340.
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[4]郑鸿明,娄兵,蒋在超.复杂地貌区地震资料处理中的静校正方法[J].新疆石油地质,2002,23(3):214-216.
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[2]帕尔哈提,邵雨.对准噶尔盆地腹部地区地震成像的地震速度影响分析[J].石油天然气学报,2009,31(2):59-62.
[3]帕尔哈提,钱根宝,蒋在超,等.准噶尔盆地南缘油气勘探中的关键地震技术[J].西南石油大学学报(自然科学版),2009,31(5):31-36.
[4]郑鸿明,娄兵,蒋在超.复杂地貌区地震资料处理中的静校正方法[J].新疆石油地质,2002,23(3):214-216.
[5]刘治凡.准噶尔盆地沙漠区深层弱反射地震方法研究[J].新疆石油地质,1993,14(3):228-233.
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