摘要
SU气田砂岩低电阻率气层形成原因复杂 ,气水层识别也非常困难。利用测井、地质及试气等资料 ,对低电阻率气层的成因及特点进行了分析 ,确定低电阻率气层的形成主要是由低缓的构造形态、砂岩非均质性、储集层微观结构、高束缚水饱和度、泥浆侵入及粘土膜滞水增厚引起的。在此基础上通过具体实例提出了纵波差值法、声波气检测、核磁共振测井和阵列式电阻率反演识别低电阻率气层解释技术 ,见到了明显的地质效果 ,提高了测井解释精度。
Since the geneses of low resistivity gas zone with sandstones are complex in SU gas field, it is difficult to indentify the gas zone and water zone. Log, geology and gas testing data are used for analysing the geneses and characters of low resistivity gas zones. It is confirmed that main causes resulting in low resistivity gas zones are the low and flat geologic structures, heterogeneity of sandstone, microscopic texture of reservoir, high bound water saturation, mud invasion and water increment on the clay membranes. Based on the above analysis, some interpretation methods such as compressional wave slowness acoustic gas detection, NMR logging and array resistivity inversion, are bought up to indentify low resistivity gas zones which provides us visible geologic results and improves the interpretation accuracy.
出处
《测井技术》
CAS
CSCD
2004年第6期526-530,共5页
Well Logging Technology
基金
长庆石油勘探局局级课题
关键词
砂岩
低电阻率气层
成因
纵波时差
声波气检测
核磁共振测井
测井解释
sandstone
low resistivity gas zone
genesis
compressional wave slowmess
acoustic gas detection
NMR log
log interpretation
