摘要
低阻油气层是指油气层的电阻率指数小于3.0,含水饱和度大于50%,或者说油气层的电阻率小于本油区正常油气层电阻率的下限值,这类油气层在我国很多油田均有发现。因引起低阻油气层的因素很多,如储层岩石中的导电矿物质量分数、储层孔隙结构、地层水矿化度及泥浆侵入程度等,给测井解释带来很多困难。以准噶尔盆地腹部陆梁油田白垩系油层为例,利用地球化学方法,如饱和烃色谱、沥青"A"质量分数、储层荧光及储层物性来识别油气层,它避开了上述因素的影响,只与储层流体的化学性质有关,可用于低阻油气层及薄油层的识别。
Low resistivity oil and gas reservoirs are referred as the reservoir that the index of resistivity is less than 3.0,the water saturation is more than 50%,or the resistivity is lower than the low limit value of resistivity for normal oil and gas reservoirs.This kind of oil and gas reservoir has been found in many oilfields.There are several factors of forming low resistivity oil and gas reservoirs,such as the content of conductive mineral in the reservoir rock,reservoir pore structure,formation water salinity and the extent of mud invasion,which can bring many difficulties to logging interpretation.Taking the Cretaceous reservoirs of Luliang Oilfield in Junggar Basin as example,this paper adopted the geochemical methods such as saturated hydrocarbon chromatogram,the content of bitumen ＂A＂,reservoir fluorescence and physical property to identify oil and gas reservoirs,which evaded the above influence factors and could be used to identify low resistivity oil reservoirs and thin oil reservoirs.
出处
《断块油气田》
CAS
北大核心
2010年第5期529-532,共4页
Fault-Block Oil & Gas Field
基金
国家重点基础研究发展计划(973)项目"中国西部典型叠合盆地复合优势通道形成演化与油气运移效率"(2006CB202305)资助
关键词
低阻油气层
储层烃
地球化学识别
准噶尔盆地
low resistivity oil and gas reservoir
reservoir extracted hydrocarbon
identification by geochemical method
Junggar Basin.
