摘要
低电阻率油气层因其储集层电阻率低于或接近邻近水层的电阻率,致使油层测井电阻率响应特征不明显,常规方法识别油水层难度增大。通过概述新疆塔北地区中生界、新生界低电阻率油层的成因,从高矿化度地层水、高束缚水饱和度、微孔隙发育、高泥质含量、轻质油气、半封闭断层及低幅度构造7个方面剖析了导致油层电阻率减小的机理。针对低电阻率油气层的特点,简述了现场综合录井过程中利用气测录井、定量荧光、岩石热解、热解气相色谱及核磁共振技术进行低电阻率油气层的识别。应用实例表明,录井资料在识别与评价低电阻率油气层中能起到较好的作用,是识别低电阻率油气层的有效方法之一。
Due to the resistivity of low-resistivity oil and gas reservoirs being lower or close to the resistivity of the adjacent water layers,it caused logging resistivity response features of oil layers weren't obvious,the difficulties of using conventional methods to identify oil and water layers increased. Through summarizing genesis of low-resistivity oil layers of Mesozoic and Cenozoic in Tabei Area of Xinjiang,the paper analyzed the mechanism which resulted in oil layer resistivity reducing from 7 aspects,they are high salinity formation water,high bound water saturation,micro-pore developed, high shale content,light oil and gas,semi-enclosed fault and low-amplitude structure.In view of the features of lowresistivity oil and gas reservoirs,the paper made a brief introduction of conducting low-resistivity oil and gas reservoirs identification with gas logging,quantitative fluorescence, rock pyrolysis,pyrolysis gas chromatography and nuclear magnetic resonance during on-site comprehensive mud logging.The applied examples indicated that mud logging data had the good results in identifying and evaluating low-resistivity oil and gas reservoirs,it is one of effective methods for identifying low-resistivity oil and gas reservoirs.
出处
《录井工程》
2009年第2期42-46,共5页
Mud Logging Engineering
关键词
低电阻率
油气层
气测录井
识别
新疆塔北
成因简析
岩石热解
定量荧光
low resistivity
oil and gas reservoir
gas logging
identification
Tabei Area of Xinjiang
genesis analysis
rock pyrolysis
quantitative fluorescence
