Statistical Forecast Models To Determine Retrograde Dew Pressure and C7 + Percentage of Gas Condensates on Basis of Production Test Data of Eastern Venezuelan Reservoirs SPE 69393
Marrufo, Lisis Maita, José Him, Jesús Rojas, Gonzalo
Statistical Forecast Models To Determine Retrograde Dew Pressure and C7 + Percentage of Gas Condensates on Basis of Production Test Data of Eastern Venezuelan Reservoirs SPE 69393 - Dallas, Texas Society of Petroleum Engineers 2001 - Marrufo, Lisis .
In this paper are presented correlations to determine the dew point pressure and C7+ content of gas condensate reservoirs, achieved from production parameters that we usually have in the field. To develop this correlations it were collected 146 PVT analysis informs of western Venezuela (Anaco) fields: San Joaquin: 42 ; Santa Rosa: 26 ; El Roble: 16 ; Guario: 4 ; Santa Ana: 3 ; El Toco: 3 ; Zapatos: 15 ; Mata-R: 15 ; Aguasay: 13 ; La Ceibita: 5 ; Carisito: 4. At the end it were finally used 106 to the final correlations. The PVT tests results were validated through consistence tests: mathematical recombination and mass balance. After this steps an statistical analysis of the variables was done For this, statistical methods were used and they were focused on multiple no linear regressions. At last the correlations accuracy were the following: dew point pressure showed 5.74 % of average error with a correlation coefficient of 0.82 based on 80 PVT’s data, the first C7+ content correlation showed 9.59 % of average error with a correlation coefficient of 0.98 based on 81 PVT’s data, the second C7+ content correlation showed 7.85 % of average error with a correlation coefficient of 0.99 based on 90 PVT’s data. The new Retrograde Dew Point correlation that was obtained improves the Nemeth and Kennedy (10) one that forecast dew point with 9.69 % of average error when it is applied on 54 Anaco’s PVT analyses which had all the compositional information that it requires; with the new Anaco Dew Point Correlation the average error was 5 % for the same data. This news Anaco correlations allow to improve the characterization and exploitation plans of gas condensate reservoirs without PVT information.
Statistical Forecast Models To Determine Retrograde Dew Pressure and C7 + Percentage of Gas Condensates on Basis of Production Test Data of Eastern Venezuelan Reservoirs SPE 69393 - Dallas, Texas Society of Petroleum Engineers 2001 - Marrufo, Lisis .
In this paper are presented correlations to determine the dew point pressure and C7+ content of gas condensate reservoirs, achieved from production parameters that we usually have in the field. To develop this correlations it were collected 146 PVT analysis informs of western Venezuela (Anaco) fields: San Joaquin: 42 ; Santa Rosa: 26 ; El Roble: 16 ; Guario: 4 ; Santa Ana: 3 ; El Toco: 3 ; Zapatos: 15 ; Mata-R: 15 ; Aguasay: 13 ; La Ceibita: 5 ; Carisito: 4. At the end it were finally used 106 to the final correlations. The PVT tests results were validated through consistence tests: mathematical recombination and mass balance. After this steps an statistical analysis of the variables was done For this, statistical methods were used and they were focused on multiple no linear regressions. At last the correlations accuracy were the following: dew point pressure showed 5.74 % of average error with a correlation coefficient of 0.82 based on 80 PVT’s data, the first C7+ content correlation showed 9.59 % of average error with a correlation coefficient of 0.98 based on 81 PVT’s data, the second C7+ content correlation showed 7.85 % of average error with a correlation coefficient of 0.99 based on 90 PVT’s data. The new Retrograde Dew Point correlation that was obtained improves the Nemeth and Kennedy (10) one that forecast dew point with 9.69 % of average error when it is applied on 54 Anaco’s PVT analyses which had all the compositional information that it requires; with the new Anaco Dew Point Correlation the average error was 5 % for the same data. This news Anaco correlations allow to improve the characterization and exploitation plans of gas condensate reservoirs without PVT information.
