摘要
吉林油田陆续发现了荧光显示级别低的油水层及生物氧化降解重质油显示油气水层、残余油显示油水层、束缚油显示水层的特殊疑难层,该类疑难层应用常规录井难以识别,解释评价符合率非常低。针对这一情况,探讨了应用岩石热解、热解气相色谱、定量荧光和罐装气分析技术结合相关技术手段解释评价油气水层的方法。对于轻质油造成的荧光显示级别低的储集层,给出了解释评价标准和辅助识别图板;对于生物氧化降解、残余油和束缚水显示的特殊疑难储集层,应用岩石热解地化参数(S0+S1、Pg)、定量荧光相当油含量、核磁共振PK分析束缚水含量和自由流体含量等参数,结合热解气相色谱谱图和定量荧光谱图特征可进行有效识别与解释评价。实际应用表明,不同录井技术的综合应用实现了对上述疑难层的有效识别与准确解释评价,提高了吉林油田油气层的整体解释评价符合率。
The special and tough layers were continually found in Jilin Oilfield,which were oil-water layers with low-level fluorescence shows,oil-gas-water layers of heavy-oil shows with bio-oxidation degradation,oil-water layers with residual oil shows,these tough layers were difficult to identify with the conventional mud logging technology,and the interpretation and evaluation coincidence rate was very low. In view of this situation,the method was discussed,which combined geochemical pyrolysis,pyrolysis gas chromatography,quantitative fluorescence,canned gas analysis technique with correlation techniques to interpret and evaluate oil-gas-water layers. For the reservoirs with low-level fluorescence shows caused by light weight oil,the interpretation and evaluation criteria and assistant identification charts were given. The special and tough reservoirs with oxidization of biodegradation and residual oil and irreducible water shows could be efficiently identified,interpreted and evaluated,through applying the parameters of rock geochemical pyrolysis (S0+S1,Pg),relative oil content of quantitative fluorescence,irreducible water content and free fluid content with PK analysis and combining with the characteristics of pyrolytic gas chromatogram and fluorescence spectroscopy. The real results indicated that the integrated application of different mud logging techniques realized the effective identification and correct interpretation and evaluation for the above tough layers,and improved the whole interpretation and evaluation coincidence rate of hydrocarbon reservoirs in Jilin Oilfield.
出处
《录井工程》
2009年第4期17-21,共5页
Mud Logging Engineering
关键词
录井新技术
荧光显示
特殊油气水层
谱图识别
图板评价
new mud logging technology,fluorescence show,special oil-gas-water layer,spectrogram identification,chart evaluation
