Applicability of material balance method for OHIP estimation of multiple gas condensate reservoirs | |
| Author | Sutthipat Phummanee |
| Call Number | AIT Thesis no.GE-11-08 |
| Subject(s) | Gas condensate reservoirs Gas reservoirs |
| Note | A thesis submitted in partial fulfillment of the requirements for thedegree of Master of Engineering inGeosystem Exploration andPetroleum Geoengineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-11-08 |
| Abstract | Material balance method, or P/Z plot, is avery common technique to estimate originalhydrocarbon in place (OHIP) of gasreservoir. This method is applicable forasingle tankmodel which refers to a reservoir that has the same properties throughout the layer and thepressure gradients within the reservoir are small. However, this method is still applied inpractical to predict OHIP for commingled production.Theconcept of commingled production is to drain fluid from multi reservoirs at the sametime. In case of multi reservoirs, the properties of reservoir and fluid contained in eachreservoir layer may be different which is considered as a non-ideal tank model.Thus, thiswork investigates the accuracy of OHIP estimation by P/Z plot for multi gas condensatereservoirs when each reservoir has different properties. This study has focused on theeffect of permeability contrast between the reservoir layers and the effect of reservoirdepth. ECLIPSE300 is selected as a reservoir simulator to simulate the actual OHIP, gasproduction, condensate production and pressure profile which are the necessary data forP/Z plot.The result from this study shows that permeabilitycontrast is the key factor that causes theerror of OHIP estimation. When the multi reservoirs contained low permeability contrastlayered, OHIP estimation shows high degree of error especially at the early time. On theother hand, when the multi reservoirs contained high permeability contrast layered, OHIPestimation shows low error. However, the degree of error is more than the base case whichhas no contrast between the layers. The number of low permeability contrast layered isrelative to the degree oferror. For example, the more of low permeability contrast layered,the more error of estimation. For ten layered reservoirs model, the position of lowpermeability contrast layered affects to the error of OHIP estimation. For example, whenthe low permeability contrast layered is located above, it will leads to high error ofestimation. |
| Year | 2012 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-11-08 |
| 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 Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2011 |