利用岩石薄片、X射线衍射、地层水化学分析等资料,对渤海湾盆地惠民凹陷商河地区渐新统沙河街组沙三上亚段低阻油层的特征及成因进行了系统研究。研究区低阻油层的电阻率低于10Ω·m,含水饱和度大于50%,且电阻增大率小于2.储集层主...利用岩石薄片、X射线衍射、地层水化学分析等资料,对渤海湾盆地惠民凹陷商河地区渐新统沙河街组沙三上亚段低阻油层的特征及成因进行了系统研究。研究区低阻油层的电阻率低于10Ω·m,含水饱和度大于50%,且电阻增大率小于2.储集层主要为粉砂岩,泥质含量较高,黏土矿物以高岭石和伊蒙混层为主,伊利石次之。储集空间以原生孔隙为主,孔隙度为3.70%~31.60%,平均为20.63%;渗透率为0.6~55.4 m D,渗透率小于10.0 m D的样品占到了79%,为典型的中高孔低渗油藏。低阻油层内地层水矿化度较高,平均为31.43 g/L,多期的火山作用和断裂的沟通作用,导致高矿化度地层水向上侵入,形成了研究区典型的低阻油层。展开更多
The provenance of the lower Es2 in the Shanghe area was determined from an approach incorporating analysis, elemental ratios,paleocurrent direction,the typomorphic characteristics of detritus and the distribution of c...The provenance of the lower Es2 in the Shanghe area was determined from an approach incorporating analysis, elemental ratios,paleocurrent direction,the typomorphic characteristics of detritus and the distribution of conglomerate and gritstone in the peripheral basin.Typical elemental ratios characteristic of the sedimentary area were compared with those from the source areas as abstracted from sediments of the Huimin sag using cluster analysis.The results show that the distribution pattern focuses on Mg/Mn,Fe/K,Al/Na,Ba/Mn and Al/Mg.Mg/Mn is the highest ratio,from 25 to 45.This is similar to the pattern from the Precambrian.Furthermore,paleocurrent direction was used to determine provenance by examining the distribution of gritstone and the seismic progradational reflections.The research results indicate that the provenance is to the northwest in the Precambrian strata where the sand grain size is rough.To the east there is siltstone,fine sandstone and mudstone.This is significant for the exploration of oil and gas within the study area.展开更多
文摘利用岩石薄片、X射线衍射、地层水化学分析等资料,对渤海湾盆地惠民凹陷商河地区渐新统沙河街组沙三上亚段低阻油层的特征及成因进行了系统研究。研究区低阻油层的电阻率低于10Ω·m,含水饱和度大于50%,且电阻增大率小于2.储集层主要为粉砂岩,泥质含量较高,黏土矿物以高岭石和伊蒙混层为主,伊利石次之。储集空间以原生孔隙为主,孔隙度为3.70%~31.60%,平均为20.63%;渗透率为0.6~55.4 m D,渗透率小于10.0 m D的样品占到了79%,为典型的中高孔低渗油藏。低阻油层内地层水矿化度较高,平均为31.43 g/L,多期的火山作用和断裂的沟通作用,导致高矿化度地层水向上侵入,形成了研究区典型的低阻油层。
基金supported by the National Natural Science Foundation of China(No.40972043)
文摘The provenance of the lower Es2 in the Shanghe area was determined from an approach incorporating analysis, elemental ratios,paleocurrent direction,the typomorphic characteristics of detritus and the distribution of conglomerate and gritstone in the peripheral basin.Typical elemental ratios characteristic of the sedimentary area were compared with those from the source areas as abstracted from sediments of the Huimin sag using cluster analysis.The results show that the distribution pattern focuses on Mg/Mn,Fe/K,Al/Na,Ba/Mn and Al/Mg.Mg/Mn is the highest ratio,from 25 to 45.This is similar to the pattern from the Precambrian.Furthermore,paleocurrent direction was used to determine provenance by examining the distribution of gritstone and the seismic progradational reflections.The research results indicate that the provenance is to the northwest in the Precambrian strata where the sand grain size is rough.To the east there is siltstone,fine sandstone and mudstone.This is significant for the exploration of oil and gas within the study area.
