摘要
柴达木盆地西部地区主要储层藻灰岩厚度薄,多种岩性混杂,仅依靠常规测井评价精度低;藻灰岩本身的多样性又导致了测井响应的多样性,进一步加剧了储层识别和评价的难度。从分析藻灰岩的沉积特征入手,讨论了各种岩性的矿物组成,定量归纳了它们的测井响应特征,指出利用常规测井不能准确划分这类岩性。微电阻率成像测井对识别藻灰岩和区分非储层有着独特的技术优势。依据藻灰岩的图像形态特征,提出了以微电阻率成像测井为主,结合常规测井判识藻灰岩储层的方法。
Algal-limestone is the main reservoir bed in the objective region being studied, however, its thin thickness and complicated lithology cause low interpretation accuracy if just conventional well logs are used. Moreover, the diversity of well logging responses caused by diversity of algal-limestone itself makes things worse in reservoir identification and evaluation. Started with analysis of sedimentary characteristics of algal-limestone, and discussed in detail the mineral composition of various lithotypes, as well as quantitatively summarized their typical log responses, this paper points out that it is impossible to distinguish these kinds of lithotypes by conventional logs only, nevertheless, micro-resistivity imaging log has its special technical advantage in identifying algal-limestone and distinguishing nonreservoir. Based on image characteristics of micro-resistivity imaging log, presented is a method in which the micro-resistivity imaging log plays a leading role supported by conventional log to estimate and identify algal-limestone reservoir bed.
出处
《测井技术》
CAS
CSCD
2006年第6期523-526,共4页
Well Logging Technology
基金
中国石油天然气股份有限公司科技攻关项目"复杂岩性储集层测井识别
解释及评价方法研究"(P050128-2)
关键词
成像测井
测井解释
藻灰岩
柴达木盆地
imaging logging
log interpretation
algal-limestone
Qaidam Basin
