泌阳凹陷新庄地区浅层复杂断块群成像研究
|
摘要
泌阳凹陷新庄地区构造破碎,小断块发育,储层埋藏浅(只有50～800 m),地震波纵、横向速度变化剧烈,常规的地震成像方法难以满足勘探开发的需要。针对这些特点,进行了叠前时间偏移和保护浅层反射信息的处理,包括叠前数据的基础处理,速度模型的建立和偏移参数的确定三个重要环节。通过叠前去噪、高精度静校正、远偏移距拉伸处理、分偏移距能量均衡等得到了高品质的叠前数据体;通过偏移、速度分析,再偏移、再速度分析多次迭代,确定了最佳偏移速度;根据目的层倾角分布情况,选择最佳偏移孔径和偏移倾角参数,提高了成像精度。最终时间偏移成果剖面上断层清楚、信息丰富。通过综合解释,对泌阳凹陷新庄地区断裂特征取得了新的认识,发现了一批新圈闭,经钻探见到了良好的油气显示。
Xinzhuang area in Biyang sag is characterized by complex structures,well developed minor fault blocks,and shallowly buried reservoirs(only 50-800m).Because the velocity of P-wave and S- wave changes greatly,conventional seismic imaging method can not satisfy the needs of exploration and development.Aiming at the characteristics,we have adopted the shallow seismic data process- ing technologies including pre-stack de-noise,high-accuracy stat- ics,far-offset stretching,and offset division energy equalization for data process.Meanwhile,we also studied the pre-stack time mi- gration technologies such as migration velocity field establishment, migration aperture selection,and migration dip identification.In addition,we obtained the pre-stack data volume by protecting the information of shallow layers and improving the S/N of middle and deep layers.In terms of the distribution of target formation dips, proper migration aperture and dip parameters were selected to im- age the pre-stack time migration on the whole data volume.After processing,the imaging accuracy was improved.The final result profiles show clear faults and abundant information.Through com- prehensive interpretation,some new understandings have been ac- quired about the fault characteristics of Xinzhuang area,Biyang sag,some new traps discovered,and good oil/gas encountered in drilling.
Xinzhuang area in Biyang sag is characterized by complex structures,well developed minor fault blocks,and shallowly buried reservoirs(only 50-800m).Because the velocity of P-wave and S- wave changes greatly,conventional seismic imaging method can not satisfy the needs of exploration and development.Aiming at the characteristics,we have adopted the shallow seismic data process- ing technologies including pre-stack de-noise,high-accuracy stat- ics,far-offset stretching,and offset division energy equalization for data process.Meanwhile,we also studied the pre-stack time mi- gration technologies such as migration velocity field establishment, migration aperture selection,and migration dip identification.In addition,we obtained the pre-stack data volume by protecting the information of shallow layers and improving the S/N of middle and deep layers.In terms of the distribution of target formation dips, proper migration aperture and dip parameters were selected to im- age the pre-stack time migration on the whole data volume.After processing,the imaging accuracy was improved.The final result profiles show clear faults and abundant information.Through com- prehensive interpretation,some new understandings have been ac- quired about the fault characteristics of Xinzhuang area,Biyang sag,some new traps discovered,and good oil/gas encountered in drilling.
引文
1邱荣华．泌阳富油凹陷北部斜坡带浅层复杂断块群油气勘探[J]．石油与天然气地质，2006，27(6)：813～819
2张永华，罗家群，田小敏．高精度三维地震在泌阳凹陷北部复杂断块群勘探中的应用[J]．石油物探，2005，44 (3)：280～283
3伊尔马滋．地震资料处理[M]．北京：石油工业出版社，1994．305～306
4熊翥．复杂地区地震数据处理思路[M]．北京：石油工业出版社，2002．95～104
5崔汝国，覃天，凌勋．叠前时间偏移成像技术及其应用[J]．物探与化探，2006，30(6)：541～544
6方伍宝，周腾，袁联生，等．叠前深度偏移技术在复杂地区的应用[J]．石油物探，2003，42(1)：68～71
7蔡希玲，赵波，贺振华．异常噪声对叠前多道处理效果的影响[J]．石油物探，2002，41(1)：84～87
8朱生旺．用抛物线Radon变换稀疏解分离和压制多次波[J]．石油地球物理勘探，2002，37(2)：110～115
9辛可锋，王华忠，马在田．一种高精度的偏移速度分析方法[J]．勘探地球物理进展，2002，25(3)：20～26
10孙建国．Kirchhoff型真振幅偏移与反偏移[J]．勘探地球物理进展，2002，25(6)：1～5
11 Kabir M M N,Verschuur D J.Migration velocity anal- ysis using the common focus point technology[J].Ex- panded Abstracts of 66~(th) Annual Internat SEG Mtg, 1996,407～410
12 Zhang Y,Gray S,Young J.Exact and approximate weights for Kirchhoff migration[J].Expanded Abstracts of 70~(th) Annual Intemat SEG Mtg,2000,1 036～1 039
13罗省贤，李录明．三维叠前深度偏移速度模型建立方法[J]．石油物探，2002，38(4)：1～6
14王棣，王华忠，马在田．频率-波数域共偏移距叠前时间偏移方法[J]．石油物探，2004，43(1)：8～10
15李来林，吴清岭，何玉前，等．叠前深度成像技术分析及应用[J]．石油地球物理勘探，2005，40(4)：407～410
2张永华，罗家群，田小敏．高精度三维地震在泌阳凹陷北部复杂断块群勘探中的应用[J]．石油物探，2005，44 (3)：280～283
3伊尔马滋．地震资料处理[M]．北京：石油工业出版社，1994．305～306
4熊翥．复杂地区地震数据处理思路[M]．北京：石油工业出版社，2002．95～104
5崔汝国，覃天，凌勋．叠前时间偏移成像技术及其应用[J]．物探与化探，2006，30(6)：541～544
6方伍宝，周腾，袁联生，等．叠前深度偏移技术在复杂地区的应用[J]．石油物探，2003，42(1)：68～71
7蔡希玲，赵波，贺振华．异常噪声对叠前多道处理效果的影响[J]．石油物探，2002，41(1)：84～87
8朱生旺．用抛物线Radon变换稀疏解分离和压制多次波[J]．石油地球物理勘探，2002，37(2)：110～115
9辛可锋，王华忠，马在田．一种高精度的偏移速度分析方法[J]．勘探地球物理进展，2002，25(3)：20～26
10孙建国．Kirchhoff型真振幅偏移与反偏移[J]．勘探地球物理进展，2002，25(6)：1～5
11 Kabir M M N,Verschuur D J.Migration velocity anal- ysis using the common focus point technology[J].Ex- panded Abstracts of 66~(th) Annual Internat SEG Mtg, 1996,407～410
12 Zhang Y,Gray S,Young J.Exact and approximate weights for Kirchhoff migration[J].Expanded Abstracts of 70~(th) Annual Intemat SEG Mtg,2000,1 036～1 039
13罗省贤，李录明．三维叠前深度偏移速度模型建立方法[J]．石油物探，2002，38(4)：1～6
14王棣，王华忠，马在田．频率-波数域共偏移距叠前时间偏移方法[J]．石油物探，2004，43(1)：8～10
15李来林，吴清岭，何玉前，等．叠前深度成像技术分析及应用[J]．石油地球物理勘探，2005，40(4)：407～410
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心