实习项目三 二层电测深电阻率正演模拟
一、实习目的:
巩固电测深理论,掌握电测深电阻率正演方法及二层电测深曲线特征
二、要求:
1、熟练掌握电测深正演参数意义;
2、熟练掌握电测深曲线特征;
3、会使用相关软件绘制电测深视电阻率双对数图。
三、实验过程
1、二层电测深正演计算原理
2、二层电测深计算实验参数表
表1 二层电测深参数表
第一层电阻率 | 50 | 60 | 60 | 100 | 250 | 40 | 30 | 20 | 50 | 5 |
第二层电阻率 | 40 | 30 | 20 | 50 | 5 | 50 | 60 | 60 | 100 | 250 |
第一层厚度 | 2 | 4 | 6 | 8 | 10 | 2 | 4 | 6 | 8 | 10 |
r:{1.5,2,3,4,5,6,9,12,15,20,30,45,60,90}
3、程序设计及代码(可附打印源代码)
#include <stdio.h>
#include <stdlib.h>
#include<math.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
double jisuan(double rr,double pp1,double pp2,double hh);
int main(int argc, char *argv[])
{
double ps[10][14];int i,j;
double r[]={1.5,2,3,4,5,6,9,12,15,20,30,45,60,90};// AB/2
double p1[]={50,60,60,100,250,40,30,20,50,5};//一层电阻率
double p2[]={40,30,20,50,5,50,60,60,100,250};//二层电阻率
double h[]={2,4,6,8,10,2,4,6,8,10};//层厚度
FILE *fp;
fp=fopen("xxx.txt","w");
for (i=0;i<10;i++)
{
for(j=0;j<14;j++)
{
ps[i][j]=jisuan(r[j],p1[i],p2[i],h[i]);
//fprintf(fp,"%f\t%f\t",r[j]/2/h[i],ps[i][j]/p1[i]);
//printf("%f\t%f\t",r[j]/2/h[i],ps[i][j]/p1[i]);
}
//fprintf(fp,"\n");
//printf("\n");
}
for (j=0;j<14;j++)
{
for(i=0;i<10;i++)
{
printf("%f\t%f\t",r[j]/2/h[i],ps[i][j]/p1[i]);
fprintf(fp,"%f\t%f\t",r[j]/2/h[i],ps[i][j]/p1[i]);
}
fprintf(fp,"\n");
printf("\n");
}
return 0;
}
double jisuan(double rr,double pp1,double pp2,double hh)
{
double K12,pps,temp;int n;
K12=(pp2-pp1)/(pp2+pp1);
//printf("%f",K12);
pps=0.0;
temp=0.0;
for (n=1;n<=30;n++)
{
temp+=pow(K12,n)*rr/pow((rr*rr+pow(2*n*hh,2)) ,1.5);
}
pps=pp1*(1+2*rr*rr*temp);
//printf("%f",pps);
return pps;
}
-
双对数坐标视电阻率异常图(给出每条曲线参数,可打印后粘贴空白处)
四、实验结论及认识
两层水平地层的上层电阻率为,厚度为,下层电阻率为,厚度为无限大。两层电阻率之比,当大于1时,下层电阻率高,称为G型曲线;当小于1时,下层电阻率低,称为D型曲线。
五、试验数据
测点 |
1 |
2 |
3 |
4 |
5 |
||||
2AB/h | ρ0/ρ1 | 2AB/h | ρ0/ρ1 | 2AB/h | ρ0/ρ1 | 2AB/h | ρ0/ρ1 | 2AB/h | ρ0/ρ1 |
0.375 |
0.99053 |
0.1875 |
0.995992 |
0.125 |
0.998198 |
0.0938 |
0.999479 |
0.075 |
0.999273 |
0.5 |
0.980464 |
0.25 |
0.990876 |
0.1667 |
0.995808 |
0.125 |
0.998777 |
0.1 |
0.998289 |
0.75 |
0.953032 |
0.375 |
0.972407 |
0.25 |
0.986568 |
0.1875 |
0.995992 |
0.15 |
0.99434 |
1 |
0.923558 |
0.5 |
0.943253 |
0.3333 |
0.970319 |
0.25 |
0.990876 |
0.2 |
0.986947 |
1.25 |
0.897719 |
0.625 |
0.906096 |
0.4167 |
0.946806 |
0.3125 |
0.983054 |
0.25 |
0.975374 |
1.5 |
0.877093 |
0.75 |
0.864695 |
0.5 |
0.91677 |
0.375 |
0.972407 |
0.3 |
0.959172 |
2.25 |
0.840177 |
1.125 |
0.745051 |
0.75 |
0.802702 |
0.5625 |
0.925446 |
0.45 |
0.882564 |
3 |
0.823578 |
1.5 |
0.658257 |
1 |
0.68468 |
0.75 |
0.864695 |
0.6 |
0.772494 |
3.75 |
0.815283 |
1.875 |
0.603691 |
1.25 |
0.586702 |
0.9375 |
0.801988 |
0.75 |
0.646765 |
5 |
0.808642 |
2.5 |
0.555834 |
1.6667 |
0.477631 |
1.25 |
0.712 |
1 |
0.446011 |
7.5 |
0.803844 |
3.75 |
0.522448 |
2.5 |
0.386422 |
1.875 |
0.603691 |
1.5 |
0.182175 |
11.25 |
0.801708 |
5.625 |
0.509358 |
3.75 |
0.35229 |
2.8125 |
0.542834 |
2.25 |
0.051093 |
15 |
0.80096 |
7.5 |
0.505144 |
5 |
0.343104 |
3.75 |
0.522448 |
3 |
0.026513 |
22.5 |
0.800427 |
11.25 |
0.50225 |
7.5 |
0.337441 |
5.625 |
0.509358 |
4.5 |
0.021848 |
6 |
|
7 |
|
8 |
|
9 |
|
10 |
|
2AB/h |
ρ0/ρ1 |
2AB/h |
ρ0/ρ1 |
2AB/h |
ρ0/ρ1 |
2AB/h |
ρ0/ρ1 |
2AB/h |
ρ0/ρ1 |
0.375 |
1.00978 |
0.1875 |
1.004374 |
0.125 |
1.002053 |
0.0938 |
1.000568 |
0.075 |
1.000955 |
0.5 |
1.020241 |
0.25 |
1.009985 |
0.1667 |
1.004785 |
0.125 |
1.001332 |
0.1 |
1.00225 |
0.75 |
1.04911 |
0.375 |
1.030416 |
0.25 |
1.015406 |
0.1875 |
1.004374 |
0.15 |
1.007474 |
1 |
1.080867 |
0.5 |
1.063185 |
0.3333 |
1.034279 |
0.25 |
1.009985 |
0.2 |
1.017329 |
1.25 |
1.109649 |
0.625 |
1.105887 |
0.4167 |
1.061979 |
0.3125 |
1.018605 |
0.25 |
1.032916 |
1.5 |
1.133601 |
0.75 |
1.154865 |
0.5 |
1.098014 |
0.375 |
1.030416 |
0.3 |
1.055026 |
2.25 |
1.180513 |
1.125 |
1.308337 |
0.75 |
1.242286 |
0.5625 |
1.083513 |
0.45 |
1.163673 |
3 |
1.205001 |
1.5 |
1.439963 |
1 |
1.408642 |
0.75 |
1.154865 |
0.6 |
1.331946 |
3.75 |
1.218837 |
1.875 |
1.54243 |
1.25 |
1.569405 |
0.9375 |
1.232602 |
0.75 |
1.54549 |
5 |
1.231177 |
2.5 |
1.663465 |
1.6667 |
1.800315 |
1.25 |
1.355527 |
1 |
1.958804 |
7.5 |
1.241126 |
3.75 |
1.79953 |
2.5 |
2.130973 |
1.875 |
1.54243 |
1.5 |
2.847341 |
11.25 |
1.245938 |
5.625 |
1.891015 |
3.75 |
2.425346 |
2.8125 |
1.707563 |
2.25 |
4.156032 |
15 |
1.24769 |
7.5 |
1.93253 |
5 |
2.595482 |
3.75 |
1.79953 |
3 |
5.403408 |
22.5 |
1.248965 |
11.25 |
1.967364 |
7.5 |
2.772162 |
5.625 |
1.891015 |
4.5 |
7.726379 |
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