Mango轻烃参数在塔里木盆地大宛齐油田中的应用  

Application of Mango's light hydrocarbon parameters in Dawanqi Oilfield,Tarim Basin,China

作　　者：杨禄[1,2] 张春明[3] 李美俊[1,2] 卞龙[4] 余兴[4] 

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]长江大学油气资源与勘探技术教育部重点实验室,湖北武汉430100 [4]中国石油新疆油田分公司,新疆克拉玛依834000

出　　处：《天然气地球科学》2016年第8期1524-1531,共8页Natural Gas Geoscience

基　　金：国家自然科学基金项目(编号:41272158;41172136);油气资源与探测国家重点实验室项目(编号:PRP/indep-2-1302)联合资助

摘　　要：塔里木盆地大宛齐油田的部分原油经受了不同程度的微生物降解作用,其原油的分子组成变化能较好地反映微生物降解作用对Mango轻烃参数的影响。对大宛齐原油轻烃组成分析发现,主体原油的Mango相关轻烃参数均呈现出陆相来源的分布特征,K1值、K2值基本保持一致,原油来源相近;随微生物降解程度的增加,Mango轻烃参数K1值减小、K2值增大,N^6_1/N^5_1值和(N^6_1+N^5_1)/(P2+P3+N_2)值整体上也呈现出减小的趋势。在大宛齐主体原油中,DW1区的N^6_1/N_2值、P2/P3值较高,DMCYC_5/MCYC_6值和MCYC_5/CYC_6值较低;而DW105西区的N^6_1/N_2值、P2/P3值则偏低,DMCYC_5/MCYC_6值和MCYC_5/CYC_6值却较高,这个区域性的分布特征可能预示大宛齐地区存在来自北部和西部的2股油气的汇入。Oil samples from Dawanqi Oilfield in the Tarim Basin,NW China,some of which have been biodegraded to different extents,were analyzed in order to investigate the effect of biodegradation on Mango＇s light hydrocarbon（LH）parameters.According to the analytical results of Mango＇s LH parameters,Dawanqi oils show characteristics of terrigenous organic matter input and belong to the same oil family.With increasing degree of biodegradation,Mango＇s LH parameters from Dawanqi crude oils such as the values of K1,N-6_1/N-5_1and（N-6_1＋N-5_1）/（P2＋P3＋N_2）decrease,and K2 values increase.In non-biodegraded oils,DW1 block are characterized by high values of N6 1/N_2 and P2/P3,and low values of DMCYC_5/MCYC_6 and MCYC_5/CYC_6,while DW105-west block are characterized by low values of N-6_1/N_2 and P2/P3,and high values of DMCYC_5/MCYC_6 and MCYC_5/CYC_6,which implied that there are at least two oil-charging orientations from the north and west of the study area.

关 键 词：Mango轻烃参数 塔里木盆地 大宛齐油田 微生物降解 原油 

分 类 号：TE122.1[石油与天然气工程—油气勘探]