镇泾油田延长组长8段储层流体性质识别方法  

Identification Method of Reservoir Fluid Properties of Chang 8 Member of Yanchang Formation in Zhenjing Oilfield

作　　者：刘亮 丁慧 冉利民 Liu Liang;Ding Hui;Ran Limin(Department of Geology and Environmental Engineering, Shanxi Institute of Technology,Yangquan Shanxi 045000, China;North China Measurement and Control Company of Sinopec Jingwei Company, Zhengzhou Henan 453700, China)

机构地区：[1]山西工程技术学院地质与环境工程系,山西阳泉045000 [2]中石化经纬公司华北测控公司,河南郑州450000

出　　处：《工程地球物理学报》2022年第2期192-201,共10页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学青年基金(41804097)。

摘　　要：镇泾油田延长组属于低孔低渗复杂致密砂岩储层,用传统以电阻率为背景的流体评价技术已经不能适用于目前勘探开发的需要。为了增强储层流体性质的识别精度,根据镇泾油田延长组储层束缚水饱和度较高的特点,建立了含水饱和度与束缚水饱和度比值图版,其比值在1.00~1.17之间为油层或差油层,在1.17~1.55之间为油水同层或含油水层,大于1.55为水层。还建立了电阻率与声波时差反算电阻率重叠法,可以直观、快速、有效地进行延长组储层流体性质识别。通过实例验证,两种方法结合使用,对延长组储层流体性质的识别正确率达到88%,取得了良好的识别效果。The Yanchang formation in Zhenjing oilfield is a complex tight sandstone reservoir with low porosity and low permeability.The traditional fluid evaluation technology based on resistivity can no longer meet the needs of current exploration and development.In order to enhance the identification accuracy of reservoir fluid properties,a ratio chart of water saturation and irreducible water saturation is established based on the characteristics of high irreducible water saturation in Yanchang formation of Zhenjing oilfield,with the ratio ranging from 1.00 to 1.17 as oil layer or poor oil layer,from 1.17 to 1.55 as oil-water layer or oil-abearing water layer,and greater than 1.55 as water layer.In addition,the resistivity overlap method of inverse calculation of resistivity and acoustic time difference is established,which can intuitively,quickly and effectively identify the fluid properties of Yanchang formation.Through the example verification,the combination of the two methods has achieved good recognition effect,and the recognition accuracy rate of fluid properties in Yanchang formation reaches 88%.

关 键 词：镇泾油田 致密砂岩气 流体性质识别 

分 类 号：P631.8[天文地球—地质矿产勘探]