摘要
页岩气主要以游离和吸附方式赋存于暗色泥页岩或炭质泥页岩中。其中,游离气一般赋存于泥页岩的孔隙或裂缝中,而吸附气主要赋存于泥页岩中的有机质或黏土颗粒表面。依据不同测井曲线的基本原理,结合实验测试,利用测井技术对页岩气进行识别分析与评价,并分别计算出游离气含量和吸附气含量。通过研究分析,提出了计算页岩游离气含量"四步法"和吸附气含量"三步法"。依据建立的页岩气测井评价模型,以川东南海相页岩地层为例进行技术应用,取得了良好的效果。
Shale gases mainly occur in dark shale or carbonaceous shale as free and adsorbed gas.Free gas generally occurs in shale pores or cracks,and adsorbed gas mainly occurs on the surface of organic matter or clay grains.This paper identifies and evaluates shale gases by using well logging technology and combining with experimental measurement,and respectively calculates free gas content and adsorbed gas content.A ' four-step' method for calculating free gas content and a ' three-step' method for adsorbed gas content are proposed.Moreover,a shale gas logging evaluation model has been set up and applied to the marine shale formation in southeastern Sichuan,China,and has achieved good result.
出处
《特种油气藏》
CAS
CSCD
北大核心
2012年第2期12-15,135,共4页
Special Oil & Gas Reservoirs
基金
国家自然科学基金"页岩气聚集机理与成藏条件"(40672087)
关键词
游离气含量
吸附气含量
测井评价
页岩气
海相页岩
川东南地区
free gas content
adsorbed gas content
logging evaluation
shale gas
marine shale
southeastern Sichuan
