摘要
常规岩石物理实验存在实验周期长、实验数据种类少、实验数据信噪比低等问题。介绍数字岩心技术的主要工作内容。其工作流程为取心、现场快速分析、基于岩石物理精细实验和数据库技术的数学分析建模、将数字岩心孔隙度、渗透率、饱和度模型用于测井解释。以核磁共振岩样分析为基础,建立岩心现场快速测量与分析技术以及与区块相统一的岩石物理量转换关系。通过系统分析核磁共振T2谱及岩石物理数据挖掘技术,实现由核磁共振信息计算求取孔隙度、渗透率、岩电参数m、n。建立基于核磁共振T2谱的孔隙度结构指数及S1、S2、S3,以实现对岩样孔隙结构类型的综合评价。在满足测井解释精度的前提下,实验周期由原来的1.5个月减少到3d。该技术已在华北、长庆、吐哈和青海等油田应用,取得了较好的效果。
Traditional rock petrophysics experiment has several disadvantages such as long exper- iment period, limited experiment data types and low data SNR. Introduced is the main works of the digital core technology. Its working process includes, coring, in-situ rapid data analysis, modeling by mathematical analysis based on petrophysical fine experiment and database technolo- gy, log interpretation using digital core porosity model, permeability model and saturation mod- el. In-situ rapid core measurements and analysis technology are established based on digital core NMR rock sample analysis. And also a transformation relationship between the rock block and its physical properties is built in accordance with the block. Through systematic analysis of T2 spec- trum and petrophysical data mining technology, porosity, permeability, rock electrical parameters m and n are easily calculated by use of NMR information. Porosity structure index and S1, S2, S3 based on NMR T2 spectrum are set up to realize comprehensive evaluation of sample pore struc- tures. The experiment period has been shortened from 1.5 month to 3 days with reasonable log interpretation precision. Practical applications of digital core technology in North China, Chan- gqing, Qinghai and Turpan-Hami oilfield have obtained good results.
出处
《测井技术》
CAS
CSCD
北大核心
2012年第2期154-159,共6页
Well Logging Technology
关键词
测井解释
数字岩心
岩石物理性质
T2谱
岩心分析
岩电参数
孔隙结构
log interpretation, digital core, rock petrophysical property, T2 spectrum, core anal- ysis, rock resistivity parameter, pore structure
