摘要
为了准确地识别和评价低电阻率油层,提高录井解释符合率.通过分析渤海地区低电阻率油层的特征及形成机理.对低电阻率油层采取气测录井和岩石热解气相色谱录井等录井方法识别和评价进行了探索。气测录井利用全烃及烃组分以及气体比率L_M、L_H和H_M曲线在油水层的组合形态来判断储集层流体性质。岩石热解气相色谱录井利用检测的碳数分布特征和岩石热解气相色谱谱图形态建立了评价低电阻率油层的标准。综合应用这两项录井技术.识别和评价了渤海地区BZ油田群等多个油田50余口探井共计62个低电阻率油层.其中油层和差油层42层、油水同层12层、含油水层8层.经试油论证.总体符合率达到90%以上.减少了低电阻率油层的误判和漏判。
In order to accurately identify and evaluate low-resistivity oil layers,improve mud logging interpretation coincidence rate,by analyzing the characteristics and forming mechanism of low-resistivity oil layers in Bohai area,the authors explored mud logging methods which adopted gas logging and rock pyrolysis gas chromatography logging to identify and evaluate low-resistivity oil layers.Gas logging determined the reservoirs fluid properties by using total hydrocarbon,hydrocarbon components,and the combination patterns for gas ratio curves of L_M,L_H and H_M in oil-water layers.Rock pyrolysis gas chromatography logging uses the features of carbon number distribution and the shapes of rock pyrolysis gas chromatogram spectrum to establish the standards of evaluating low-resistivity oil layers.Integrated application of these two mud logging technologies,total 62 low-resistivity oil layers of more than 50 exploration wells from BZ oilfield group and other oilfields in Bohai area were identified and evaluated,among these low-resistivity oil layers,oil layers and poor oil layers were 42,oil-water layers were 12,oily water layers were 8.Verified by oil test,the overall compliance rate was over 90%,these techniques can avoid misjudging or omitting to judge low-resistivity oil layers.
出处
《录井工程》
2015年第2期46-49,91-92,共4页
Mud Logging Engineering
