Simulation of enhanced gas recovery with various conditions for water-drive gas reservoirs | |
| Author | Wisarut Puttaraseree |
| Call Number | AIT Thesis no.GE-12-09 |
| Subject(s) | Gas reservoirs--North Malay Basin Gas reservoirs--Thailand, Gulf of Natural gas--North Malay Basin Natural gas--Thailand, Gulf of |
| 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-12-09 |
| Abstract | Generally, in the cases where reservoir pressure depletes naturally with gas production, which is defined as depletion - drive reservoi rs, recovery factor tends to be high, often approaching 90 percent. However, w hen there is water encroachment or water drive reservoirs, gas expansion is restricted because of aquifer pressure. In some cases water influx is relatively strong or the gas we ll is located close to water front, gas recovery may be as low as 10 percent of the original gas in place due to liquid - loading effect, which causes the well to be shut prematurely while large amount of residual gas is still left in place. Accelerated gas production is one of the most applicable approaches to enhance gas recovery factor for water - drive gas reservoir, by producing the gas reserve at a certain rate which the reservoir pressure is depleted suddenly related to influence of aquifer . The objecti ve of this study is to use reservoir simulation to evaluate gas recovery and production life with several aspects and various reservoir conditions when accelerated production technique is applied in order to discover which reservoir conditions are the most optimal recovery factor for a representative gas reservoir in North Malay Basin, Gulf of Thailand . There are several reservoir model s were constructed and r eservoir sim ulation were performed by ECLIPSE 100 simulator . For the different conditions , the ef fect of aquifer s ize , reservoir length, number of gas well , gas well location on up - dip zone, gas well spacing and Corey ’s exponents for relative permeability were considered. The most efficient condition to enhance gas recovery factor for water - drive gas reservoir when accelerated technique is applied tend to be in the reservoir with medium length for which a gas production well is located on up - dip zone , but furthest away from the top of the reservoir. Moreover, high value of Corey’s exponents for relativ e permeability correlation can substantially affect gas recovery, especially for large aquifer size . However, more numbers of gas well and less well spacing seem to slightly improve gas recovery but significantly reduce the production life. |
| Year | 2013 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-12-09 |
| 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 Phienwej; |
| Scholarship Donor(s) | Royal Thai Government;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2013 |