Wanting to calibrate new key to diary analysis, a straightforward low-linear regression matchmaking was run-in Matlab 7
Table 4 summarizes the pertinent well data used for calculation of the gamma ray, potassium, and the thorium indexes. Their comparison with the actual measured clay content from the XRD analysis (Fig. 5) showed that the unmodified gamma ray, potassium, thorium indexes calculated from the linear Eq. (1) provided wide overestimation of the Shurijeh clay content, which leads eventually to the misestimating of the original hydrocarbon in place and reserves. According to the Shurijeh age (Early Cretaceous), Larinov calibration for highly consolidated formations was used and based on the data in Fig. 6, ? sh in Dewan equation which is corresponding to the highest gamma ray reading considered to be 2.75 g/cc units. The C factor in the Bhuyan–Passey modification was considered to be 60 for the Shurijeh Formation after randki japan cupid measuring the clay contents of reference adjacent shale in many surface samples. The estimated clay content from modified gamma ray, potassium, and thorium indexes are given in Table 5.
New analysis anywhere between unmodified ray indexes and core-mentioned clay content material. Black colored network Gas creating well analysis activities, black colored upwards-directing triangle low-promoting well investigation products
Thickness versus GR regarding core types of the new Shurijeh Creation. Black colored circle Gas promoting well investigation products, and you can black upwards-directing triangle non producing really analysis items
Therefore, the values out of linear gamma beam, potassium, and you will thorium spiders was indeed modified, having fun with all the empirically derived low-linear change equations brought because of the Larinov , Clavier , Steiber , Dewan , or Bhuyan and you will Passey (all of the relationships is actually placed in Dining table step 1) to locate a quicker incorrect estimation regarding Shurijeh clay stuff
Just like the problems in the earlier in the day improvement generated a comparatively high variation on results, it is vital to get an empirical relationship into the clay blogs estimations within creation. 11.0 application. (suite…)