焉耆博南凹陷储层特征及含油气性研究

博湖南部凹陷是焉耆盆地油气勘探资源接替区。在砂体展部、物源方向、沉积相及岩石学特征研究的基础上,结合地质录井、钻井、测井和试油等资料,分析了储层特征及含油气性,认为该区为近源扇三角洲沉积体系,砂体发育,储集物性较差,属低孔-特低孔、特低渗-超低渗储层,缺乏二次生烃条件,含油气程度低。南部凹陷剩余资源量0.9×103t,尚可探明石油地质储量(0.27～0.36)×108t。有利目标是博南鼻状构造带、阿买来断鼻构造带、山前逆冲推覆带和深凹区。

Features and Oil-bearing Properties of Reservoirs in the Bonan Depression in Yanqi Basin

The southern depression in Yanqi basin is the reserve replacement area for exploration. Based on study of sand- body distribution, source direction, sedimentary facies and lithologic properties, the oil - bearing properties of reservoirs are analyzed in combination with geologic logging, drilling, logging and testing data. It is believed that the sedimentary system in this area is proximal delta with well - developed sandbodies and poor reservoir physical properties. The reservoirs belong to low - very low porosity and very low - extra - low permeability reservoir types that do not have secondary hydrocarbon generating conditions, thus oil- bearing degrees are low. There are 90 million tons of remaining hydrocarbon resources in the southern depression of which 27 to 36 million tons can be proved. The favorable exploration targets are the Bonan nose structural zone, the Amailai fault nose structural zone, the piedmont thrust zone and the deep depression zone.