摘要
在测井储层评价孔隙度模型建立过程中,通常运用的是小岩样氦气孔隙度分析数据。对于储层各向异性强、溶蚀孔及裂缝发育的岩心,小岩样不能完全反映所对应深度段的真实情况,运用该模型计算的孔隙度数值会在一定程度上小于地层真实孔隙度。对全直径与小岩样孔隙度试验数据进行了深入分析,根据海相碳酸盐岩之岩性与物性特征,在利用小岩样分析数据建模得到测井计算孔隙度的基础上,研究测井信息与丰富的小岩样及全直径岩心孔隙度的相关性,通过测井孔隙度与小岩样孔隙度、小岩样与全直径孔隙度的数据拟合,实现测井孔隙度向视小岩样孔隙度再向视全直径孔隙度的合理转换,达到利用全直径岩心间接刻度测井孔隙度的目的,应用效果良好。
The Helium-porosity analysis data of small core samples is usually used in the process of porosity modeling in logging reservoir evaluation.For the reservoirs with strong anisotropy,dissolved pore and fracture development,however,the small core samples can not fully reflect the real situation of corresponding depth,therefore,the porosity calculated using this model is less than the true value of formation porosity to some extent.This article makes a deeply analysis of porosity experimental data of whole well cores and small cores,and according to characteristics of lithology and physical property of marine carbonate and logging porosity calculation by small cores analysis data modeling,studied is correlation of well-logging information with small core and the whole well porosity data.Finally,by fitting the data of logging porosity and small cores porosity,small cores porosity and whole well cores porosity,achieved is a reasonable conversion from logging porosity to small cores apparent porosity,and then to whole well cores apparent porosity,so as to use the whole well cores porosity to calibrate logging porosity indirectly,the application result of which is good.
出处
《测井技术》
CAS
CSCD
北大核心
2010年第6期572-575,共4页
Well Logging Technology
关键词
测井解释
碳酸盐岩
全直径岩样
小岩样
拟合
模型
视全直径孔隙度
log interpretation
carbonate
whole well core
small core
data fitting
model
whole well core apparent porosity
