浊积砂体埋深预测不确定性分析方法——以尼日尔三角洲E油田为例
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摘要
在油气田勘探开发过程中,地质资料的不完备性、不确定性是固有存在的,弄清不确定性有助于降低勘探开发的风险。针对正在实施开发井钻探的尼日尔三角洲E油田开展砂体埋深预测不确定性研究,形成3类不确定性分析图版,用以表征砂体埋深预测的不确定性范围和影响原因:应用砂体埋深误差分布范围不确定性图版,分级表征砂体埋深预测整体不确定范围;应用砂体埋深预测差异与位置关系不确定性图版,表征不同位置砂体埋深预测差异不确定性范围;应用目标井与速度参考井距离分析图版,表征砂体预测差异与参考速度距离的关系。
In the exploration and development of oil and gas fields,there exists the incompletion and uncertainty of geological data,and the uncertainty is inherent.It is helpful to reduce the risk of exploration and development by making clear the uncertainty.Based on the study of uncertainty prediction sand body buried depth of drilling of development wells in E Oilfield from Niger Delta,chart boards for 3 categories of uncertainties are established for denoting the scope of uncertainty and causes of impact:the uncertainty chart of error distribution range of two-stage sand bodies,it is used for characterizing the whole uncertain range of sand body buried depth prediction;the uncertainty chart of the relationship between the difference of buried depth and sand body location,it is used for characterizing the uncertainty range of sand body buried depth prediction in different sand bodies;the chart of distance analysis of target well and velocity reference well,it is used for characterizing the relationship between sand body prediction difference and reference velocity and distance.
In the exploration and development of oil and gas fields,there exists the incompletion and uncertainty of geological data,and the uncertainty is inherent.It is helpful to reduce the risk of exploration and development by making clear the uncertainty.Based on the study of uncertainty prediction sand body buried depth of drilling of development wells in E Oilfield from Niger Delta,chart boards for 3 categories of uncertainties are established for denoting the scope of uncertainty and causes of impact:the uncertainty chart of error distribution range of two-stage sand bodies,it is used for characterizing the whole uncertain range of sand body buried depth prediction;the uncertainty chart of the relationship between the difference of buried depth and sand body location,it is used for characterizing the uncertainty range of sand body buried depth prediction in different sand bodies;the chart of distance analysis of target well and velocity reference well,it is used for characterizing the relationship between sand body prediction difference and reference velocity and distance.
引文
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[3]袁成,李景叶,陈小宏.基于概率统计的地震岩相识别不确定性定量评价方法[J].地球物理学报,2015,58(10):3825~3836.
[4]李少华,张昌民,彭裕林,等.储层不确定性评价[J].西安石油大学学报(自然科学版),2006,13(1):11~13.
[5]赵士华,张兴平.煤矿采区三维地震构造精细解释技术———全三维地震解释技术[J].中国煤炭地质,2003,15(5):20~22.
[6]王彦辉,陈显森.地震技术在水平井设计中的应用[J].内蒙古石油化工,2010,36(19):93~95.
[7]崔明明,顾畛逵,侯乾,等.微构造分析方法在油藏精细描述中的应用[J].科技视界,2014,(15):34~36.
[8]惠晓宇,凌云,孙德胜,等.油田开发阶段叠后地震反演影响因素研究[J].中国海上油气,2009,21(5):308~312.
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