利用地球物理测井资料评价储层物性特征——以鄂尔多斯盆地吴起油田长8段砂岩为例  

RESERVOIR CHARACTERIZATION OF CHANG 8 FORMATION BY PETROPHYSICAL STUDIES OF GEOPHYSICAL LOGS IN WUQI OILFIELD,ORDOS BASIN

作　　者：付新 张连梁 刘远志 周传臣 王永刚 FU Xin;ZHANG Lian-liang;LIU Yuan-zhi

机构地区：[1]中国石油集团测井有限公司青海分公司,甘肃敦煌736202 [2]中海石油(中国)有限公司深圳分公司,广东深圳518000 [3]天津大港油田滨港集团博弘石油化工有限公司,天津300280

出　　处：《新疆石油天然气》2019年第3期28-35,5,共8页Xinjiang Oil & Gas

摘　　要：吴起油田是鄂尔多斯盆地重要的油气产区,长8段发育多套碎屑岩储层.以吴起油田为例,利用不同井的测井曲线进行储层评价,根据储层物理参数分析和中子-密度交会图法认为储层岩性主要为砂岩.利用净产层厚度、净毛比、总孔隙度、有效孔隙度、泥质含量、含水饱和度、含油饱和度等参数图评价储层油气潜力.储层物性参数评价结果表明:砂岩有效厚度为5~10m,净毛比0.17~0.75,有效孔隙度为7%~12%,泥质含量在27%~40%,含油饱和度在12%~31%,净产层含油饱和度在95%.砂岩等厚图揭示了油气的空间展布规律,为下一步吴起油田长8段砂岩储层的勘探提供了有效的地质指导.The Wuqi oilfield is one of the largest hydrocarbon producing region in Ordos Basin,which is charac-terized by the presence of many hydrocarbon-bearing fields including clastic and carbonates proven reservoirs inYanchang formation. This study has been carried out in the Wuqi oil field to evaluate the hydrocarbon prospectsof Chang8 formation by using complete suite of geophysical logs of different wells. The analytical formation evalu-ation by using petrophysical studies and eutron-density crossplots unveils that litho-facies mainly comprising ofsandstone. The hydrocarbons potentialities of the formation zone have been characterized through various isopa-rameteric maps such as gross reservoir and net pay thickness,net-to-gross ratio,total and effective porosity,sha-liness,and water and hydrocarbons saturation. The evaluated petrophysical studies show that the reservoir hasnet pay zone of thickness range 5 to 10 m,net-to-gross ratio range of 0.17 to 0.75,effective porosity range of 7%to12 %,shaliness range of 27 to 40 % and hydrocarbon saturation range of 12 to 31 %. However,in the net payzone hydrocarbon saturation reaches up to 95%. The isoparametric charts of petrophysically derived parametersreveal the aerial distribution of hydrocarbons accumulation in Wuqi oilfield Chang8 Formation,which may behelpful for further exploration.

关 键 词：吴起油田 长8段 砂岩 鄂尔多斯盆地 测井评价 

分 类 号：TE122.23[石油与天然气工程—油气勘探]