东营凹陷典型剖面重磁电震综合解释方法研究
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摘要
潜山内幕、砂砾岩和深层地质体是东营凹陷地震勘探相对困难的目标。为此,选择总长度约100 km的SL616测线进行了重磁电震综合解释方法的研究,该测线依次经过广饶凸起、东营凹陷和陈家庄凸起3个二级构造单元。阐述了航磁资料的三维欧拉反褶积、电法资料的快速松弛反演(RRI)和重力资料的约束正反演等处理方法。地震勘探中存在屏蔽效应的潜山、砂砾岩体等隐蔽地质目标在重磁电资料上有明显的异常特征。通过重磁电震资料的综合对比分析,重新认识了潜山内幕、砂砾岩体、边界断裂和深部地层,发现了新的地质体。认为陈家庄凸起并非是单一的太古界地层,其内部存在断裂和低阻、低密度体;根据地震资料解释的东营凹陷古生界顶面最深点应向北偏移。
Buried hill,deep geological body and glutenite are the relatively difficult exploration targets in Dongying Sag.Aiming at this problem,line SL616 with a total length of about 100 km was utilized to discuss gravity-magnetic-electric-seismic integrated interpretation method;the line is located in the east of Jiyang Depression, crossing three secondary structure units,including Guangrao Salient,Dongying Sag and Chenjiazhuang Salient.The 3-D Euler deconvolution for aeromagnetic data,rapid relaxation inversion for electric data,constrained forward modeling and inversion methods for gravity data were introduced.Some subtle geologic targets,such as buried hill and glutenite,which have shielding effect in seismic exploration,also have obvious anomaly on gravity-magnetic-electric data.Through integrated analysis of gravity,magnetic,electric and seismic data,the inner buried hill,glutenite,boundary fault and deep formalions were re-identified,and new geologic bodies were found.The result shows that Chenjiazhuang Salient is not the unique Archaean strata,fault,low-resistivity and low-density bodies exist inside the salient.From the seismic data,the deepest Paleozoic strata in Dongying Sag should be shifted northward.
Buried hill,deep geological body and glutenite are the relatively difficult exploration targets in Dongying Sag.Aiming at this problem,line SL616 with a total length of about 100 km was utilized to discuss gravity-magnetic-electric-seismic integrated interpretation method;the line is located in the east of Jiyang Depression, crossing three secondary structure units,including Guangrao Salient,Dongying Sag and Chenjiazhuang Salient.The 3-D Euler deconvolution for aeromagnetic data,rapid relaxation inversion for electric data,constrained forward modeling and inversion methods for gravity data were introduced.Some subtle geologic targets,such as buried hill and glutenite,which have shielding effect in seismic exploration,also have obvious anomaly on gravity-magnetic-electric data.Through integrated analysis of gravity,magnetic,electric and seismic data,the inner buried hill,glutenite,boundary fault and deep formalions were re-identified,and new geologic bodies were found.The result shows that Chenjiazhuang Salient is not the unique Archaean strata,fault,low-resistivity and low-density bodies exist inside the salient.From the seismic data,the deepest Paleozoic strata in Dongying Sag should be shifted northward.
引文
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13马丽娟,何新贞.孙明江,等.东营凹陷北部砂砾岩储层描述方法[J],石油物探,2002,41(3):354-358
14李丕龙,张善文,宋国奇,等.济阳成熟探区非构造油气藏深化勘探[J].石油学报,2003,24(5):10-15
15陈海云,林春明,阎汉杰,等.重力资料在济阳坳陷石油勘探中的应用[J].石油学报,2005,26(6):46-51
16贾红义,于建国,王金铎.东营凹陷深层构造剖析及其地质意义[J].油气地球物理,2007,5(1):59-63
2林珍,易海,王衍棠.重磁资料在北黄海盆地综合地球物理解释中的应用[J].物探与化探,2008,32(2): 111-115
3郝天珧,杨长春,刘洪,等.环渤海地区前新生代油气资源的综合地质、地球物理研究[J].地球物理学进展, 2007,20(4):1 269-1 279
4刘光鼎,祝靓谊.近期油气勘探地球物理的一些新进展[J].地球物理学进展,2003,18(3):363-367
5黄仲良.石油重·磁·电法勘探[M].东营:中国石油大学出版社,1998.1-396
6谭捍东,余钦范,John B,等.大地电磁法三维快速松弛反演[J].地球物理学报,2003,46(6):850-854
7高利华.大地电磁测深在北天山前缘油气勘探中的应用[J].石油物探,2006,45(4):427-431
8陈东敬,于鹏.大地电磁与地震联合反演技术在西亚某区的综合应用[J].石油物探,2005,44(3):252-256
9俞建宝,吴永栓,刘立群.也门47区块重震联合解释技术的应用[J].勘探地球物理进展,2007,30(3):214- 218
10揭景荣,阎汉杰,苗永康,等.高精度重力协同地震识别潜山与断裂技术的开发应用[J].油气地质与采收率, 2008,15(1):59-62
11李丕龙,张善文,王永诗,等.断陷盆地多样性潜山成因及成藏研究——以济阳坳陷为例[J].石油学报,2004, 25(3):28-31
12贾霍甫,徐思煌.东营凹陷通王地区负反转构造与断块型古潜山的形成[J].油气地质与采收率,2006,13 (3):19-21
13马丽娟,何新贞.孙明江,等.东营凹陷北部砂砾岩储层描述方法[J],石油物探,2002,41(3):354-358
14李丕龙,张善文,宋国奇,等.济阳成熟探区非构造油气藏深化勘探[J].石油学报,2003,24(5):10-15
15陈海云,林春明,阎汉杰,等.重力资料在济阳坳陷石油勘探中的应用[J].石油学报,2005,26(6):46-51
16贾红义,于建国,王金铎.东营凹陷深层构造剖析及其地质意义[J].油气地球物理,2007,5(1):59-63
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