LD地区砂泥岩地层岩石力学参数计算方法研究  

The Calculation Method of Rock Mechanics Parameters in the Sand Shale Formation of LD Area

作　　者：邱莎莎[1] 夏宏泉[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室

出　　处：《国外测井技术》2016年第6期40-42,45,共4页World Well Logging Technology

摘　　要：LD地区砂泥岩地层具有低孔、低渗的特点。本文首先根据目的层段单轴/三轴岩石压缩实验,确定了LD地区静态岩石力学参数的变化特征;然后利用岩性、纵波时差数据预测横波时差曲线,并建立了动、静态岩石力学参数转换关系式,构建了LD地区岩石力学参数、脆性指数的计算模型,将计算结果与实验值比较,误差较小;由此建立了LD地区砂泥岩层段的岩石力学参数和脆性指数剖面,得到了LD地区中浅层砂泥岩的岩石力学参数和脆性指数的变化特征。结果表明:LD地区杨氏模量在20-45GPa之间,泊松比介于0.18-0.34之间,脆性指数介于36-48%之间。这为LD地区中浅层砂泥岩段的压裂施工及射孔层位优选提供了基础数据。The sand shale formation of LD areahas the characteristics of low porosity and low permeability.First of all,according to the objective interval rock uniaxial/triaxial compression experiments, the static characteristics of rock mechanics parameters wasdetermined. Then usingthe lithology and longitudinal wave time data to predict the shear wave time curve, and the dynamic and static relation between rock mechanics parameters was established. the rock mechanics parameters and the brittleness index calculation modelswas built in LD area, comparingwhich with the experimental values, the error wasless; So the rock mechanics parameters and brittleness index profilesof sand shale formation in LD area was calculated, andthe rock mechanics parameters and brittleness index change characteristicsof the sand shale was got. The results showed the Elastic modulusis 20-45 Gpa, the Poisson's ratio is between 0.18 and0.34, the brittleness index is 36-48%. This provides the basic data forfracturing operation and perforating horizon optimization in the sand mudstone of LD area.

关 键 词：LD地区 致密砂泥岩地层 岩石力学参数 脆性指数 

分 类 号：TU45[建筑科学—岩土工程]