No. Ref. Year Author Solution method Need pore volume compressibility Advantages and disadvantages 1 [3 ] 1971 Hammerlindl Polyline analysis method Hammerlindl method Average formation compressibility ✓ 2 Material balance ✓ 3 [7 ] 1983 Chen Chen Yuanqian method ✓ Volumetric gas reservoirs, pressure coefficient at the transition point is 1.2~1.3 4 [8 ] 2001 Gan Gan-Blasingame Х No pore volume compressibility is required, and it can be calculated whether the curve inflection point appears or not 5 [9 ] 1981 Ramagost Linear regression method Ramagost-Farshad ✓ Volumetric gas reservoirs 6 [10 ] 1981 Roach Roach Х Pore volume compressibility can be calculated, but it is sensitive to the original pressure data 7 [11 ] 1994 Poston Improved Roach method Х It is suitable for water drive gas reservoirs and can calculate the reserves before water invasion, the size of water invasion, and the effective compressibility coefficient 8 [12 ] 1993 Becerra-Arteaga Becerra-Arteaga Х Need gradient 9 [2 ] 1963 Havlena Havlena-Odeh Х Suitable for water intrusion gas reservoirs, sensitive to original pressure and early data; if it is a closed gas reservoir, the rock compressibility coefficient can be calculated 10 [13 ] 1993 Yuanqian Nonlinear regression method Binary regression Х Knowing the variation law of natural gas deviation coefficient; this method can calculate dynamic reserves and compressibility 11 [14 ] 2008 Gonzalez Nonlinear regression method Quadratic production model Х Dimensionless linear coefficient is less than 0.4 12 [15 ] 2011 Qin Trinomial approximation Х The shape of the curve is not easy to control and may cause large errors 13 [16 ] 2017 Jiao Limit form Х Volumetric gas reservoirs 14 [17 ] 2019 Sun Power function form Х Volumetric gas reservoirs 15 [18 ] 1991 Ambastha Type curve matching Ambastha method Х Volumetric gas reservoirs, original pressure, and temperature are known in type curve matching, strong multisolution 16 [19 ] 1998 Fetkovich Fetkovich method Х Considering the influence of nonreservoir dissolved gas, inversely calculate the compressibility and the size of the water body 17 [14 ] 2008 Gonzalez Gonzalez method Quadratic production model Х Mainly used to verify the results of other methods 18 [6 ] 2020 Sun Single log match analysis Х Volumetric gas reservoirs 19 [20 ] 2001 Marhaendrajana Multiwell modern production decline analysis method ✓ Without considering the impact of water invasion, only reserves of connected well groups can be calculated 20 [21 ] 1998 Walsh Trial analysis method ✓ It can be used to calculate the volume of water bodies and calculate the water-soluble gas reserves
