摘要
以委内瑞拉奥里诺科重油带MPE3油田为例,在分析水平井信息特征的基础上,对比了直井和水平井数据分布和变差函数的差异,针对将水平井信息直接应用于地质建模中产生的大数据误区,提出了相应的建模策略。研究表明由于研究区水平井具有数据信息量大、井轨迹方向性强、砂岩钻遇率高的特点,造成了不符合地质认识的变差函数分析结果,进而在沉积微相和储集层物性建模以及概率储量预测上产生误区。建模时首先采用直井信息对分流河道砂体分布进行变差函数分析,通过沉积相控、地震约束的方法建立岩相框架;再利用水平井信息反映储集层内部非均质性精度高的特点,结合直井信息进行泥质隔夹层的变差函数分析,建立相应的储集层岩相精细模型;最后建立储集层物性模型,并分井区计算地质储量。该建模策略能够真实反映地质特征,且有效提高了井间砂体预测的精度,增强了储集层地质模型的可靠性。
Based on analysis of horizontal well data characteristics, the differences of data distribution and variogram between vertical and horizontal wells in MPE3 oil field of Orinoco heavy oil belt were compared, and modeling strategies were proposed to cope with the big data paradox when data of horizontal wells was used directly into geologic modeling. The study shows the horizontal wells in the study area contain a large quantity of information, strong directionality of well trajectories and high drilling ratio of sandstone, causing variogram analysis result unconformable to the geologic understanding, and in turn making errors in the modeling of sedimentary microfacies and reservoir physical properties and prediction of probabilistic reserves. Firstly, the distributary channel distribution variogram was analyzed with data of vertical wells, and then the lithofacies framework was established under the control of the sedimentary facies and seismic data. After that, the horizontal wells data revealing high heterogeneity accuracy of reservoir, was combined with the vertical wells data to analyze argillaceous interlayer variograms and the corresponding reservoir lithofacies models were constructed. Finally, reservoir physical property models were generated and the geological reserves were calculated by wellblocks. This reservoir modeling method does not only reflect the geologic features underground, but also improve the accuracy of inter-well sand body prediction, and enhance the reliability of reservoir geologic model ultimately.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2017年第6期939-947,共9页
Petroleum Exploration and Development
基金
国家科技重大专项"大型油气田及煤层气开发"(2016ZX05031-001)
关键词
水平井
地质建模
大数据误区
大数据分析
变差函数
horizontal well
geological modeling
big data paradox
big data analysis
variogram
作者简介
黄文松（1973-）,男,河北高阳人,博士,中国石油勘探开发研究院高级工程师,主要从事油气田开发和地质建模工作.地址：北京市海淀区学院路20号,中国石油勘探开发研究院美洲研究所,邮政编码：100083.E-mail：hwshws6@petrochina.com.cn
