採油技術硏究 : 파이프라인 유동해석 연구
|서명||採油技術硏究 : 파이프라인 유동해석 연구|
|초록||The petroleum exploration activities have been performed by our own technology in the concession Block VI-I in Korean continental shelf for more than 10 years. Gas and gas condensate were discovered from several exploratory wells drilled in this block. This year, the news of another hit in the well of Gorae-V was very encouraging. Different from the previous gas discoveries, the reservoir properties and the productivity of Gorea-V well were excellent and the reserve estimate was very optimistic for the gas field development in this region. Gas consumption was very rapidly increased during recent years because of the image of cleaner fuel compared with other fossil fuels and convenience of usage. Korea is the 5th country in the world in terms of total quantity of petroleum consumption. This is the reason why the secure supply of oil and gas in the future is vital to our industry. The development of gas or gas condensate reservoir is different from that of oil reservoir. Especially sales contract must be made before the initiation of gas field exploitation. The production facilities including pipeline system must be selected and designed for further consideration. In this study, we have selected the 'K' offshore gas field where the water depth is 155m and the distance from the shore is 50km. The main purpose of this production system analysis is to select the optimum size and capacity of production facilities including pipeline in order to find the most appropriate production schedule. Production system analysis using nodal analysis includes deliverability calculation of the reservoir, production system optimization, recoverable reserve estimation, and performance forecast of the reservoir with three different production rate scenarios. The reservoir pressure is 4525 psia and the temperature is 248 ℉. The OGIP of this reservoir was calculated as 24.64 BCF/well and the reservoir is expected to produce for up to 10 years. The porosity is 6% and the average gas permeability is 17 md.The results show that the absolute open flow potential is 56.5 MMscfd and the optimum production tubing size is 3.958 inch. Under the assumption of 700-1,200 psia as the minimum wellhead pressure for compression, the maximum abandonment pressure is 1516 psia and the minimum abandonment pressure is 923 psia. The recovery factor for this reservoir ranges from 67.6% to 81.7% depending on the sweep efficiency. For the pipeline flow, both the single-and multi-phase flow were analyzed to calculate the pipeline capacity and liquid holdup. For the multi-phase transport of gas and condensate, the flow regime is interpreted as a segregated flow and the optimum pipeline size is 8,001 inch and average liquid holdup is 8%. Without any treatment of water phase from the produced fluids, gas hydrate can be generated at this environmental condition. In order to prevent the gas hydrate formation in the production system, 22% methanol solution should be injected as an inhibitor. The result from this study can be directly applied to the development of gas field in Block VI-1. All the people in petroleum industry are eager to hear the news of gas field exploitation and we hope that this study can contribute to that project|
|키워드||채유, 파이트라인, 유동해석, 유동, 가스, 가스전, 수송|
김세준. (1998). 採油技術硏究 : 파이프라인 유동해석 연구. 韓國資源硏究所.