地震属性技术在王73地区储层预测中的应用
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摘要
王73地区沙四段油气藏类型主要以岩性和构造-岩性油气藏为主,滨浅湖相的滩坝砂体是最主要的油气储集体,岩性以灰质、泥质粉细砂岩为主。储层横向变化大,围岩中普遍含有灰岩,使得砂、泥岩速度差异减小,利用传统的稀疏脉冲反演和基于模型反演的方法不能对储层进行有效预测。为此,首先利用岩石物理学方法,对研究区储层的岩性、物性、含油气性与地震属性之间的关系进行了分析研究;然后利用地震属性技术提取了对刻画砂体和扇体边界较敏感的均方根振幅属性、时差属性和瞬时相位相干属性,对储层的空间展布特征进行描述,预测了油气勘探的有利区域;最后应用井震结合的外漂克立金技术对王73地区沙四段纯下2砂组的厚度进行了估算。根据预测结果,在油气勘探有利区域部署了一口钻井,钻遇的纯下2砂组厚度与预测厚度一致。
The hydrocarbon reservoir of Es4 in Wang 73 area is domina- ted by lithologic reservoir and structural-lithologic reservoir.The beach-dam sandstone of offshore lake facies is the main accumula- tion unit with the lithology being calcareous and argillaceous silt- stone.The great horizontal change of the reservoir and the wide distribution of limestone in surrounding rocks decrease the differ- ence in velocity between sand and shale,which,in turn,makes the traditional sparse impulse inversion and model-based inversion not effective in the reservoir prediction.Therefore,petrophysics is used to analyze the relationship among seismic attributes and lithol- ogy,physical property,hydrocarbon property.Then,the seismic attribute technology is used to extract root-mean-square amplitude, moveout,and instantaneous phase coherent property,which are sensitive in portraying the boundary of sand and fan body;at the same time.the distribution of reservoir is described,and the po- tential zone of hydrocarbon exploration predicted.Finally,well- seismic-based ex-drifting kriging technology was applied to estimate the thickness of Chunxia 2 sand set of Es4 upper member in Wang 73 area.In terms of the predicted results,one drilling well was de- ployed in the potential zone and the drilled thickness of Chunxia 2 sand set is coincide with the predicted thickness.
The hydrocarbon reservoir of Es4 in Wang 73 area is domina- ted by lithologic reservoir and structural-lithologic reservoir.The beach-dam sandstone of offshore lake facies is the main accumula- tion unit with the lithology being calcareous and argillaceous silt- stone.The great horizontal change of the reservoir and the wide distribution of limestone in surrounding rocks decrease the differ- ence in velocity between sand and shale,which,in turn,makes the traditional sparse impulse inversion and model-based inversion not effective in the reservoir prediction.Therefore,petrophysics is used to analyze the relationship among seismic attributes and lithol- ogy,physical property,hydrocarbon property.Then,the seismic attribute technology is used to extract root-mean-square amplitude, moveout,and instantaneous phase coherent property,which are sensitive in portraying the boundary of sand and fan body;at the same time.the distribution of reservoir is described,and the po- tential zone of hydrocarbon exploration predicted.Finally,well- seismic-based ex-drifting kriging technology was applied to estimate the thickness of Chunxia 2 sand set of Es4 upper member in Wang 73 area.In terms of the predicted results,one drilling well was de- ployed in the potential zone and the drilled thickness of Chunxia 2 sand set is coincide with the predicted thickness.
引文
1刘伟,吕优良,徐徽等．东营凹陷南斜坡东段沙四上亚段沉积相与砂体展布研究[J]．江汉石油学院学报, 2004,26(2):23～25
2刘成斋,冉建斌,杨永生等．稀疏脉冲和基于模型反演在王家岗沙四段砂岩油藏精细勘探中的应用[J]．石油地球物理勘探,2002,37(4):401～406
3张明震．波阻抗反演技术在孤东地区馆陶组薄储层描述中的应用[J]．石油大学学报,2003,27(6):22～24
4王咸彬,顾石庆．地震属性的应用与认识[J]．石油物探,2004,43(增刊):25～27
5李守军,王新征,杨国权等．胜利油田王家岗地区下第三系沙四段砂岩储集层类型及分布[J]．石油大学学报,2002,26(4):16～22
6姜秀清,江洁,高平等．地震属性分析技术在不同油气藏中的应用[J]．石油物探,2004,43(增刊):70～72
7马丽娟,高平,金学社等．东营南坡东部沙河街组四段储层成因及预测方法[J]．地质科技情报,2002,21(3): 55～60
8谢雄举,季玉新．优选地震属性预测储层参数的方法及其应用[J]．石油物探,2004,43(增刊):127～131
9鲍祥生,尹成,赵伟等．储层预测的地震属性优选技术研究[J]．石油物探,2006,45(1):28～33
10刘文岭,朱庆荣,戴晓峰等．具有外部漂移的克里金方法在绘制构造图中的应用[J]．石油物探,2004,43(4): 404～406
2刘成斋,冉建斌,杨永生等．稀疏脉冲和基于模型反演在王家岗沙四段砂岩油藏精细勘探中的应用[J]．石油地球物理勘探,2002,37(4):401～406
3张明震．波阻抗反演技术在孤东地区馆陶组薄储层描述中的应用[J]．石油大学学报,2003,27(6):22～24
4王咸彬,顾石庆．地震属性的应用与认识[J]．石油物探,2004,43(增刊):25～27
5李守军,王新征,杨国权等．胜利油田王家岗地区下第三系沙四段砂岩储集层类型及分布[J]．石油大学学报,2002,26(4):16～22
6姜秀清,江洁,高平等．地震属性分析技术在不同油气藏中的应用[J]．石油物探,2004,43(增刊):70～72
7马丽娟,高平,金学社等．东营南坡东部沙河街组四段储层成因及预测方法[J]．地质科技情报,2002,21(3): 55～60
8谢雄举,季玉新．优选地震属性预测储层参数的方法及其应用[J]．石油物探,2004,43(增刊):127～131
9鲍祥生,尹成,赵伟等．储层预测的地震属性优选技术研究[J]．石油物探,2006,45(1):28～33
10刘文岭,朱庆荣,戴晓峰等．具有外部漂移的克里金方法在绘制构造图中的应用[J]．石油物探,2004,43(4): 404～406
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