Quantitative Prediction of Low-Permeability Sandstone Grain Size Based on Conventional Logging Data by Deep Neural Network-Based BP Algorithm

Table 2

The three porosity and GR distribution ranges of and in well X1.

Curve name		AC	CNL	DEN	GR
Unit		μs/ft	v/v	k/m^3	api
	Main interval	75.58-115.33	0.136-0.291	2.36-2.54	72.60-118.20
	Mean	96.65	0.221	2.46	95.73
	Main interval	72.32-85.44	0.106-0.193	2.40-2.49	82.17-118.76
	Mean	77.13	0.141	2.43	98.50