基于声电判别指数识别致密砂岩气层——以鄂尔多斯盆地东北缘D探区为例  

Gas formation identification in tight sandstone based on acoustic-electricity discrimination index:Take D exploration area on northeastern margin of Ordos Basin as an example

作　　者：王文文[1] 张宏伟 周全[1] 成家杰[1] 侯振永[1] WANG Wenwen;ZHANG Hongwei;ZHOU Quan;CHENG Jiajie;HOU Zhenyong(Oilfield Technology Department,China Oilfield Services Limited,Beijing 101149,China)

机构地区：[1]中海油田服务股份有限公司油田技术事业部,北京101149

出　　处：《复杂油气藏》2020年第4期35-38,共4页Complex Hydrocarbon Reservoirs

基　　金：中国海洋石油集团有限公司“煤层气/页岩气/致密砂岩气三气共采先导性试验研究”资助项目。

摘　　要：鄂尔多斯盆地东北缘发育典型的致密砂岩气藏,由于孔隙结构复杂,展现出"非阿尔奇响应",使得储层气水层中的电阻率差异变小,流体性质识别难度较大。以鄂尔多斯盆地东北缘D探区为例,通过剖析致密砂岩储层含气性与电阻率、声电参数关系,揭示单一电法资料对低阻气层识别效果较差,而纵横波速度比、泊松比等参数对含气变化响应较敏感。综合阵列声波、阵列感应、核磁等测井数据,构建了包含深电阻率、泊松比等参数的声电判别指数。研究区试验井实例表明,利用声电判别指标识别致密砂岩气层是一种有效方法。Typical tight sandstone gas reservoirs developed in the northeastern margin of the Ordos Basin.Due to the complex pore structure,it exhibits a“non-Archie response”,which makes the difference in resistivity between the gas and water layers of the reservoir smaller and makes it difficult to identify fluid properties.Taking the exploration area D in the northeastern margin of the Ordos Basin as an example,through analyzing the relationship between the gas-bearing capacity of tight sandstone reservoirs and the resistivity and acoustic-electric parameters,it is revealed that a single electrical method has a poor recognition effect on low-resistance gas layers,while parameters such as P/S wave velocity ratio and Poisson's ratio are more sensitive to changes in gas content.Combined with logging data such as array acoustic wave,array induction,nuclear magnetic field,etc.,an acoustic-electric discriminant index containing parameters such as deep resistivity and Poisson's ratio is constructed.Examples of test wells in the study area show that it is an effective method to identify tight sandstone gas reservoirs by using acoustic and electrical discrimination indicators.

关 键 词：阵列声波 声电判别指数 气层识别 致密砂岩气藏 

分 类 号：TE133[石油与天然气工程—油气勘探]