Effect of Heterogeneity on gas material balance calculation | |
| Author | Supachai Sabayjai |
| Call Number | AIT Thesis no.OTM-14-01 |
| Subject(s) | Material balances Gas reservoirs |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Offshore Technology and Management, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. OTM-14-01 |
| Abstract | Material balance method, or P/Z plot, is a very common technique to estimate original gas in place (OGIP) of gas reservoir. This met hod is applicable for a single tank model which refers to a reservoir that has the same pr operties throughout the layer and the pressure gradients within the reservoir are small. However, this method is still applied in practice to predict OGIP for commingled production. The concept of this study is about heterogeneous reservoirs. In case of single reservoirs, the properties of reservoir and fluid containe d in each reservoir layer may be different which is considered as a non-ideal tank mo del. Thus, this work investigate on how heterogeneity may affect gas material ba lance calculation. ECLIPSE100 reservoir simulator will be used to generate producti on history for heterogeneous reservoirs for material balance plots. The accuracy of OGIP estimation by material balance method for heterogeneity in dry gas reservoirs. It is expected that the result from this study will determine whether material balance method is applicable or not for heterogeneity in dry gas reserves estimation. The result from this study shows that low and high permeability layer is the key factor that causes the error of OGIP estimation. When the heterogeneous reservoirs contain low permeability layer, OGIP estimation shows hi gh degree of error especially at the early time. When the reservoir is heterogeneous, short term shut in period will give more percentage of error than homogeneous reservoirs. |
| Year | 2014 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. OTM-14-01 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Offshore Technology and Management (OTM) |
| Chairperson(s) | Chiu, Gregory L.F.;Suwat Athichanagorn |
| Examination Committee(s) | Sarunphong Articharte |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2014 |