大牛地气田岩屑砂岩的测井技术研究及应用  

Study and Application of Well Logging Technology of Lithic-sandstone Reservoirs in Daniudi Gas Field

作　　者：刘双莲[1] 李浩[2] 

机构地区：[1]中国石油化工股份有限公司石油工程技术研究院,北京100101 [2]中国石油化工股份有限公司石油勘探开发研究院,北京100083

出　　处：《石油天然气学报》2011年第2期96-99,166-167,共4页Journal of Oil and Gas Technology

摘　　要：岩屑砂岩储层在鄂尔多斯及准噶尔等中西部盆地分布比较广泛,国内对于它的测井评价问题探讨很少,但试验数据表明,有些岩屑砂岩与石英砂岩有着不一致的岩石骨架测井值,且中子测井值普遍偏高。当运用同一测井模型评价岩屑砂岩与石英砂岩时,面临着一些储层孔隙度解释不够精确的问题,导致测井解释的气层被试气证实为干层。为此,以大牛地气田岩屑砂岩为例,对其测井评价进行了深入研究,通过岩屑砂岩储层岩石骨架的测井研究,其中子响应可作为划分太原组与山西组地层的重要标志;利用岩屑砂岩储层特殊的测井响应合成的产能识别曲线,能有效识别储层,符合率大于80%。The lithic-sandstone reservoirs were widely distributed in the middle and west of Ordos and Junggar Basins,the logging evaluation was less researched.The experimental data indicated that some lithic-sandstones had higher value of neutron logging than that of quartz sandstones in rock matrix.The calculation results of porosity would not correct when the same interpretation models were used for evaluating lithic-sandstone and quartz-sandstone reservoirs,some dry layers approved in well testing were considered as gas zones.By taking lithic-sandstones in Daniudi Gas Field for example,the logging evaluation was deeply studied,by studying of logging of lithic-sandstone framework,different responses of neutron logging can be used for important symbol of Taiyuan and Shanxi Formations according to the research of rock matrix in lithic-sandstone reservoirs.It can be used for effectively identify curve of productivity with coincidence rate over 80%.

关 键 词：测井响应 岩石骨架 岩屑砂岩 大牛地气田 

分 类 号：P618.13[天文地球—矿床学] P631.81[天文地球—地质学]