济阳坳陷砂岩储层预测失利的分析与思考
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摘要
由济阳坳陷近2年失利探井的分析可以看出,储层预测失利井占总失利井的28%,提高储层预测精度成为隐蔽油气藏勘探的关键环节。从岩性、物性和含油气性3个方面对储层预测失利井进行了解剖,明确了现今条件下利用叠后地震属性等分析手段,难以对砂砾岩体的有效储层进行预测,对薄层砂体的叠置关系及油藏变化的预测也存在较大的风险。从技术和应用两个层面对储层预测偏差的原因进行深入思考,提出了加强失利井分析、严格储层地震预测的关键步骤等方案以降低预测风险。这将促进砂岩储层地震预测的规范化,提高预测的成功率。
The analysis about the defeat explore wells in Jiyang Depression in the past two years shows that the ratio of reservoir defeat wells to all defeat wells amounts to 28%,and improving reservoir pre- diction accuracy has become the key to the exploration of subtle hydrocarbon reservoirs.The dissection about the defeat wells an- alyzed from the prediction of lithology,physical property and hy- drocarbon-bearing probability respectively suggests that it is dif- ficult to predict the effective reservoir based on the post-stack seismic attributes at present,and there is big risk in the predic- tion of superimposed relation of thin layer sandbodies and the variation of oil pools.Considering the reasons resulting the reser- voir estimate deviation from the technique and application,the project to reduce the estimate risk by strengthening defeat wells analysis and keeping the key steps of the reservoir seismic pre- diction strictly was put forward.It has an aggressive function to make the seismic prediction more canonical and raise the success rate of estimation in sandstone reservoir.
The analysis about the defeat explore wells in Jiyang Depression in the past two years shows that the ratio of reservoir defeat wells to all defeat wells amounts to 28%,and improving reservoir pre- diction accuracy has become the key to the exploration of subtle hydrocarbon reservoirs.The dissection about the defeat wells an- alyzed from the prediction of lithology,physical property and hy- drocarbon-bearing probability respectively suggests that it is dif- ficult to predict the effective reservoir based on the post-stack seismic attributes at present,and there is big risk in the predic- tion of superimposed relation of thin layer sandbodies and the variation of oil pools.Considering the reasons resulting the reser- voir estimate deviation from the technique and application,the project to reduce the estimate risk by strengthening defeat wells analysis and keeping the key steps of the reservoir seismic pre- diction strictly was put forward.It has an aggressive function to make the seismic prediction more canonical and raise the success rate of estimation in sandstone reservoir.
引文
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[5]王利．牛庄洼陷东坡沙四段沉积相及油气成藏特征[J]．海洋石油，2006，26(4)：44-46，61．
[6]王家映．地震学中的反演理论[M]．武汉：中国地质大学出版社，1998：168—175．
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[2]谭俊敏．埕南地区砂砾岩扇体储层的预测及效果[J]．石油地球物理勘探，2004，39(3)：310—313．
[3]撒利明，曹正林．提高储层预测精度技术思路与对策[J]．大庆石油地质与开发，2002，22(6)：6—7，35．
[4]刘书会．薄层属性分析中存在的问题及解决方法——以东营凹陷梁108地区滩坝砂岩为例[J]．油气地质与采收率，2006，13 (2)：56-58．
[5]王利．牛庄洼陷东坡沙四段沉积相及油气成藏特征[J]．海洋石油，2006，26(4)：44-46，61．
[6]王家映．地震学中的反演理论[M]．武汉：中国地质大学出版社，1998：168—175．
[7]赵晨光，李雯如，李东波，等．万全地区钻遇砂层在三维高分辨率地震资料上的标定[J]．中国海上油气：地质，1991，3(2)：25—27．
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