多参数聚类技术在川东北生物礁预测中的应用
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摘要
川东北QLB构造位于广旺海槽东边的台地边缘礁滩组合相区,根据钻井、测井和地震资料分析结果,采用多参数聚类分析技术对QLB构造生物礁的分布范围及厚度变化进行了预测。首先通过统计QB101井测井曲线和井旁道生物礁层段的地震属性信息,建立过井地震剖面的属性响应特征,确定出样本井的属性参数值;然后在一定的范围内搜索这些样本值,从而得到需要预测的生物礁信息。预测结果表明,QLB生物礁为堤礁,厚度60多m,面积约46.5km~2。根据预测结果确定了QLB2井生物礁钻探坐标,结果在地震预测的靶心处成功地钻遇了生物礁,厚度55m,有效厚度约30m,获工业性气流。
The QLB structure of northeast Sichuan province is located in the reef flat facies of the platform edge in the east of Guangwang trough.According to the analysis of drilling,logging and seismic data,the multi-parameter clustering analysis has been applied to predict the changes of the distribution and the thickness of the reefs.Firstly,using the statistical parameter information of log- ging curves and the information of well QLB101 and the seismic at- tributes from the traces beside the wells in reef sections,the attrib- utes response characteristics of seismic profiles crossing the wells were established,and the parameter values of the sample well was identified.Then,the information of the reefs to be predicted was found out by picking up the sample values in a certain range.The prediction results show that the reef in QLB region is barrier reef with the thickness of above 60m and the area of about 46.5km~2. The reef target coordinate of QLB2 well was proposed according to the prediction results.The reef had been drilled in the predicted target center.The drilled reef is 55m in thickness and about 30min effective thicknes.Industrial oil flow has been obtained in this well.
The QLB structure of northeast Sichuan province is located in the reef flat facies of the platform edge in the east of Guangwang trough.According to the analysis of drilling,logging and seismic data,the multi-parameter clustering analysis has been applied to predict the changes of the distribution and the thickness of the reefs.Firstly,using the statistical parameter information of log- ging curves and the information of well QLB101 and the seismic at- tributes from the traces beside the wells in reef sections,the attrib- utes response characteristics of seismic profiles crossing the wells were established,and the parameter values of the sample well was identified.Then,the information of the reefs to be predicted was found out by picking up the sample values in a certain range.The prediction results show that the reef in QLB region is barrier reef with the thickness of above 60m and the area of about 46.5km~2. The reef target coordinate of QLB2 well was proposed according to the prediction results.The reef had been drilled in the predicted target center.The drilled reef is 55m in thickness and about 30min effective thicknes.Industrial oil flow has been obtained in this well.
引文
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2郭建宇，马朋善，胡平忠等．地震-地质方法识别生物礁[J]．石油地球物理勘探，2006，41(5)：587～591
3牟传龙，谭钦银，余谦等．四川盆地东北部长兴组层序地层与储层分布[J]．沉积与特提斯地质，2004(3)：181～187
4任兴国，罗利，姚声贤等．川东地区生物礁测井预测方法研究[J]．石油勘探与开发，2000，27(1)：41～43
5陈祖庆，杨鸿飞，王涛等．川东北宣汉-达县地区礁滩相储层地震预测研究[J]．南方油气，2005，18(4)：31～36
6刘殊，郭旭升，马宗晋等．礁滩相地震响应特征和油气勘探远景[J]．石油物探，2006，45(5)：452～458
7刘殊，唐建明，马永生等．川东北地区长兴组-飞仙关组礁滩相储层预测[J]．石油与天然气地质，2006，27(3)：332～338
8王一刚，陈盛吉，徐世琦等．四川盆地古生界、上元古生界天然气成藏条件及勘探技术[M]．北京：石油工业出版社，2001．67～78
9印兴耀，周静毅．地震属性优化方法综述[J]．石油地球物理勘探，2005，40(4)：482～489
10汪泽成，赵文智，张林等．四川盆地构造层序与天然气勘探[M]．北京：地质出版社，2002．1～14
11陈波，胡少华，毕建军等．地震属性模式聚类预测储层物性参数[J]．石油地球物理勘探，2005，40(2)：204～208
12陈宝书，杨午阳，刘全新等．地震属性组合分析方法及应用[J]．石油物探，2006，45(2)：173～176
13刘洪林，朱秋影，周振兴等．模糊聚类分析及其在测井识别油气层中的应用[J]．勘探地球物理进展，2005，40 (6)：425～427
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