摘要
分析金湖凹陷闵桥油田常规和特殊岩心实验结果认为,该区古近系阜三段低电阻率油层主要因其粘土矿物含量高、岩石表面的亲水性及孔隙结构复杂而导致高束缚水含量,进而大幅降低了油层的电阻率。利用交会图法、地质综合法等方法对研究区低阻油层进行识别,建立了区分油水层的判别标准:闵桥油田阜三段低阻油层渗透率大于7×10^(-3)μm^2,孔隙度大于18.6%,含油饱和度的下限值为26.6%,声波时差大于323μs/m,测井电阻率下限值为2.6Ω·m。
The experimental results of conventional and special cores taken from Minqiao Oilfield indicated that the resistivity of the 3rd member of the Paleogene Funing Formation(E1f3) in the area was reduced largely by high irreducible water,which was mainly caused by high the content of clay mineral,the rock surface wettability and the complex pore structure. Using the crossplot method and the geology integration method,it was identified the low resistivity zone in the study area. And then a identification standard was established,which can be used to distinguish oil and water layers. Results showed that there are permeability higher than 7 × 10^(-3)μm^2,porosity bigger than18. 6%,the oil saturation lower limit of 26. 6%,interval transit time bigger than 323 μs/m,and the logging resistivity lower limit of 2. 6 Ω·m in the low resistivity zone of E1f3 of Minqiao Oilfield.
出处
《复杂油气藏》
2016年第3期40-44,共5页
Complex Hydrocarbon Reservoirs
关键词
金湖凹陷
闵桥油田
低电阻率油层
成因分析
油水层识别
Minqiao Oilfield
low resistivity reservoir
genesis analysis
identification of oil and water layers
