AVO异常分析在大杨树盆地油气勘探中的应用  

APPLICATION OF AVO ANOMALY ANALYSIS TO OIL AND GAS EXPLORATION IN DAYANGSHU BASIN

作　　者：闫磊[1] 刘招君[1,2] 方石[1,2] 陈永成[1] 贾建亮[1] 

机构地区：[1]吉林大学地球科学学院,吉林长春130061 [2]油页岩实验中心,吉林长春130061

出　　处：《物探化探计算技术》2011年第4期435-439,348-349,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：全国油气资源战略选区项目(2009GYXQ12-04-1)

摘　　要：大杨树盆地岩性复杂,储层含有大量孔隙及裂缝,但是在该区油气并没有取得重大突破,因此勘探方向成为研究区的重要问题。这里利用杨参1井测井数据计算了含气层位的阻抗,分析判断该含气层位AVO异常为第一类AVO异常。运用AVO分析软件处理杨参1井所在74号线的叠前道集资料,发现该含气层位AVO异常振幅为第一类AVO异常。运用AVO技术分析认为,杨参1井两侧存在范围较大的含气异常,而且存在含气性更好的第二类AVO异常特征。最后综合各类资料,认为74号线位于大杨树盆地南部坳陷最有利的勘探远景区,AVO异常特征段为下一步重点工作的地区,作为探井位置CDP3010附近应引起重视。The lithology was complex in Dayangshu basin, the reservoir contained large amounts of pores and cracks, but there wasn't a major breakthrough in oil and gas exploration in the area, so exploration was an important issue in the area. In this paper, Yangcanl well log data were used to calculate the impendence of gas-bearing layer, AVO anomaly of gas-beating layer was belong to the first AVO anomaly after analysis. AVO analysis software was used to process the prestack gathers data of line 74, where is the location of Yangcanl Well, and it found that AVO anomaly amplitude of the gas-bearing layer was the first AVO anomaly. The use of AVO technical analysis proved that there was a wider range of gas-bearing unusual in both sides of Yangcan1 well, and there was second AVO anomaly which was more gas-bearing. Finally, various types of information proved that the line 74 in the southern basin depression Dayangshu was the best prospective areas for exploration, AVO anomaly segment was key areas for the next exploration step, and the attention should be paid to the area near CDP3010.

关 键 词：AVO分析 大杨树盆地 油气勘探 

分 类 号：TE13[石油与天然气工程—油气勘探]