Applicability of material balance method for OHIP estimation of multi-layered reservoirs having different gas condensate composition | |
| Author | Juthaporn Densirimongkol |
| Call Number | AIT Thesis no.GE-12-12 |
| Subject(s) | Gas reservoirs Gas condensate reservoirs |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Geotechnical and Earth Resources Engineering with Area of Specialization in Geosystem Exploration and Petroleum Geoengineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-12-12 |
| Abstract | Material balance method is one of the basic methods that are used for estimating original gas in place beside volumetric method and decline curve analysis. Material balance method or P/Z plotwasestablished for estimating original gas in place (OGIP) ofsingle gas reservoir.However, in practical this method is still appliedfor multi-layer gas reservoirs and gas condensate reservoirs.Therefore, material balance method isapplicable or not for multi-layered gas condensate reserves estimationhaving different fluid composition.The objective of this study is to evaluate the effect of different reservoir fluid composition and permeability on multi-layered gas condensate reservoirswhich influence the accuracy of OHIP estimation byusingmaterial balance method(P/Z plot).Five fluid compositionswere selected to investigate the applicability of material balance method (P/Z plot)for single, two and three layered of reservoirs.First of all, the resultshows that composition of gas condensate is a main factor which influenceontheaccuracy of OHIP estimationfor multi-layered reservoirs. As a result,theOHIPestimationis less accuratewhen the reservoirs contain rich gas condensatecomposition. Second, low permeability is the key factor that causes the error of estimation. The results show when the multiple reservoirs contain low permeability layer, OHIP estimation is underestimation which it shows high degree of error. In contrast, when the multiple reservoirs contain high permeability layer, OHIP estimation islessoverestimation which it shows low error. Finally, in the case of increasing of the number of low permeability layers, it will causethe high error of OHIP estimation. On the other hand,when number of high permeability layers isincreased,the OHIP estimation has smalleffect on OHIP estimation which it providessmall error. |
| Year | 2013 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-12-12 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Pham Huy Giao; |
| Examination Committee(s) | Suwat Athichanagorn;Noppadol Phien-wej; |
| Scholarship Donor(s) | Royal Thai Government;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2013 |