涪陵北东岳庙段页岩油气层测录井特征

Logging Characteristics of Shale Reservoirs in the Dongyuemiao Section of Northern Fuling Area

通过研究四川盆地涪陵北地区涪页A井、涪页B井页岩油气层测录井资料,分析了涪陵北东岳庙段页岩油气储层测录井特征,并建立页岩油气储层综合评价标准。主要认识如下:涪陵北东岳庙段优质页岩油气储层厚度为28m,岩性主要为暗色厚层页岩夹薄层介壳灰岩,脆性矿物含量36.7%〜38.4%;孔隙度4.05%〜6.11%;含气饱和度≥40%,有机碳含量近2%,地层压力属于异常高压地层,涪陵北东岳庙段为页岩油气有利勘探层系,其中东一亚段为优质页岩油气层段,具备良好的勘探和经济开发前景。

Through studying the logging data of shale reservoirs of Well Fuye A and Fuye B in the northern Fuling area of Sichuan basin,the logging characteristics of oil and gas reservoirs of shales in the Dongyuemiao section of the northern Fuling area are analyzed,and the comprehensive evaluation criteria for shale oil and gas reservoirs are established.The main understanding is as follows:the thickness of high-quality shale oil and gas reservoirs in the Dongyuemiao section of the northern Fuling area is 28m,the lithology is mainly dark thick shale intercalated with thin shell limestone;the brittle mineral content is 36.7%~38.4%,the porosity is 4.05%~6.11%,the gas saturation is more than 40%,the organic carbon content is nearly 2%,and the formation pressure falls into the abnormal high pressure one.The Dongyuemiao section of the northern Fuling area is a favorable exploration zone for shale oil and gas,among which the Dong No.1 sub-member is a high-quality shale oil and gas reservoir,which has a good view of exploration and economic development.