LD地区砂泥岩地层岩石力学参数计算方法研究

发布时间：2018-03-10 17:15

本文选题：LD地区　切入点：致密砂泥岩地层　出处：《国外测井技术》2016年06期 　论文类型：期刊论文

【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。
[Abstract]:The sand and mudstone strata in LD area have the characteristics of low porosity and low permeability. Firstly, according to uniaxial / triaxial rock compression experiments of the target layer, the variation characteristics of static rock mechanics parameters in LD area are determined, and then the lithology is used. The S-wave moveout curve is predicted by P-wave moveout data, and the dynamic and static rock mechanics parameter transformation relations are established, and the calculation model of rock mechanics parameter and brittleness index in LD area is constructed. The calculated results are compared with experimental data, and the error is smaller. The rock mechanics parameters and brittleness index profiles of sand and mudstone formation in LD area are established, and the variation characteristics of rock mechanics parameters and brittle index of middle and shallow sand and mudstone in LD area are obtained. The results show that the Young's modulus in the area of 20 to 45 GPA. The Poisson's ratio is between 0.18-0.34 and the brittleness index is between 36-48%, which provides basic data for fracturing operation and perforation layer optimization in middle and shallow sand and mudstone section in LD area.
【作者单位】：西南石油大学油气藏地质及开发工程国家重点实验室;
【分类号】：TE311

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