Petroleum Reservoir Evaluation and Development >
2023 , Vol. 13 >Issue 3: 393 - 402
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2023.03.015
Numerical simulation study on multi-layer combined exploitation of natural gas hydrate reservoirs
Received date: 2022-01-05
Online published: 2023-06-26
Offshore natural gas hydrate reservoirs are often accompanied by a large amount of free gas. However, the low permeability of the reservoir limits the flow of gas and water in different layers. Therefore, the fully exploitation of the hydrate-dissociation gas and free gas in the reservoir is the key to improve gas production efficiency. Based on the actual geological data in the Shenhu area of the South China Sea, the TOUGH+HYDRATE code is used to establish the numerical model of the combined exploitation of three different hydrate reservoirs with vertical wells. The spatial changes of gas production, water production, temperature, pressure field and hydrate saturation are analyzed, and then the optimized depressurization production strategy of natural gas hydrate is put forward. The results show that during the depressurization production, gas and water are continuously collected to the production well, and the temperature and pressure around the well drop rapidly. After continuous production for ten years, the water production rate continues to increase with the decrease of gas production rate. The cumulative gas production of three-layer combined mining method is up to 4.59×106 m3, and the cumulative water production is 8.31×105 m3. Hydrate dissociation is controlled by the depressurized gradient, hydrates around the well are preferentially dissociated, and the flow of underlying water will accelerate the dissociation of reservoir hydrates.
Zuoya YANG , Xiaomin WU . Numerical simulation study on multi-layer combined exploitation of natural gas hydrate reservoirs[J]. Petroleum Reservoir Evaluation and Development, 2023 , 13(3) : 393 -402 . DOI: 10.13809/j.cnki.cn32-1825/te.2023.03.015
| [1] | YIN Z Y, LINGA P. Methane hydrates: A future clean energy resource[J]. Chinese Journal of Chemical Engineering, 2019, 27(9): 2026-2036. |
| [2] | ZHANG R W, LU J A, WEN P F, et al. Distribution of gas hydrate reservoir in the first production test region of the Shenhu area, South China Sea[J]. China Geology, 2018, 1(4): 493-504. |
| [3] | 邹才能, 赵群, 丛连铸, 等. 中国页岩气开发进展、潜力及前景[J]. 天然气工业, 2021, 41(1): 1-14. |
| [3] | ZOU Caineng, ZHAO Qun, CONG Lianzhu, et al. Development progress, potential and prospect of shale gas in China[J]. Natural Gas, 2021, 41(1): 1-14. |
| [4] | REN X, GUO Z Y, NING F L, et al. Permeability of hydrate-bearing sediments[J]. Earth-Science Reviews, 2020, 202:103100. |
| [5] | YIN Z Y, MORIDIS G, TAN H K, et al. Numerical analysis of experimental studies of methane hydrate formation in a sandy porous medium[J]. Applied Energy, 2018, 220: 681-704. |
| [6] | 刘树根, 焦堃, 张金川, 等. 深层页岩气储层孔隙特征研究进展——以四川盆地下古生界海相页岩层系为例[J]. 天然气工业, 2021, 41(1): 29-41. |
| [6] | LIU Shugen, JIAO Kun, ZHANG Jinchuan, et al. Research progress on the pore characteristics of deep shale gas reservoirs: An example from the Lower Paleozoic marine shale in the Sichuan Basin[J]. Natural Gas Industry, 2021, 41(1): 29-41. |
| [7] | FENG J C, WANG Y, LI X S, et al. Production behaviors and heat transfer characteristics of methane hydrate dissociation by depressurization in conjunction with warm water stimulation with dual horizontal wells[J]. Energy, 2015, 79(1): 315-324. |
| [8] | WANG Y, FENG J C, LI X S, et al. Experimental investigation of optimization of well spacing for gas recovery from methane hydrate reservoir in sandy sediment by heat stimulation[J]. Applied Energy, 2017, 207(1): 562-572. |
| [9] | 郭建春, 赵志红, 路千里, 等. 深层页岩缝网压裂关键力学理论研究进展[J]. 天然气工业, 2021, 41(1): 102-117. |
| [9] | GUO Jianchun, ZHAO Zhihong, LU Qianli, et al. Research progress in key mechanical theories of deep shale network fracturing[J]. Natural Gas Industry, 2021, 41(1): 102-117. |
| [10] | YIN Z Y, MORIDIS G J, CHONG Z R, et al. Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium[J]. Applied Energy, 2018, 230: 444-459. |
| [11] | QIN X W, LU J A, LU H L, et al. Coexistence of natural gas hydrate, free gas and water in the gas hydrate system in the Shenhu Area, South China Sea[J]. China Geology, 2020, 3(2): 210-220. |
| [12] | BOSWELL R, SCHODERBEK D, COLLETT T S, et al. The I?nik Sikumi Field experiment, Alaska North Slope: Design, operations, and implications for CO2-CH4 exchange in gas hydrate reservoirs[J]. Energy & Fuels, 2017, 31(1): 140-153. |
| [13] | 周守为, 陈伟, 李清平, 等. 深水浅层非成岩天然气水合物固态流化试采技术研究及进展[J]. 中国海上油气, 2017, 29(4): 1-8. |
| [13] | ZHOU Shouwei, CHEN Wei, LI Qingping, et al. Research on the solid fluidization well testing and production for shallow non-diagenetic natural gas hydrate in deep water area[J]. China offshore oil and gas, 2017, 29(4): 1-8. |
| [14] | HANCOCK S H, COLLETT T S, DALLIMORE S R, et al. Overview of thermal-stimulation production-test results for the JAPEX/JNOC/GSC et al. Mallik 5L-38 gas hydrate production research well[C]// Paper presented at the 2002 Mallik International Symposium on Gas Hydrate Production Research Well Program, Makuhari, Japan, December 2003. |
| [15] | DALLIMORE S R, WRIGHT J F, NIXON F M, et al. Geologic and porous media factors affecting the 2007 production response characteristics of the JOGMEC/NRCan/Aurora Mallik gas hydrate production research well[C]// Paper ICGH-5829 presented at the proceedings of the 6th International Conference on Gas Hydrates, Vancouver, Canada, July 2008. |
| [16] | RUTQVIST J, MORIDIS G J, GROVER T, et al. Geomechanical response of permafrost-associated hydrate deposits to depressurization-induced gas production[J]. Journal of Petroleum Science and Engineering, 2009, 67(1-2): 1-12. |
| [17] | KURIHARA M, FUNATSU K. Analysis of Production Data for 2007/2008 Mallik gas hydrate production tests in Canada[C]// Paper SPE-132155-MS presented at the International Oil and Gas Conference and Exhibition in China, Beijing, China, June 2010. |
| [18] | LI J F, YE J L, QIN X W, et al. The first offshore natural gas hydrate production test in South China Sea[J]. China Geology, 2018, 1(1): 5-16. |
| [19] | YE J L, QIN X W, XIE W W, et al. The second natural gas hydrate production test in the South China Sea[J]. China Geology, 2020, 3(2): 197-209. |
| [20] | KURIHARA M, SATO A, FUNATSU K, et al. Analysis of formation pressure test results in the Mount Elbert methane hydrate reservoir through numerical simulation[J]. Marine and Petroleum Geology, 2011, 28(2): 502-516. |
| [21] | 苏正, 何勇, 吴能友. 南海北部神狐海域天然气水合物热激发开采潜力的数值模拟分析[J]. 热带海洋学报, 2012, 31(5): 74-82. |
| [21] | SU Zheng, HE Yong, WU Nengyou. Numerical simulation on production potential of hydrate deposits by thermal stimulation[J]. Journal of Tropical Oceanography. 2012, 31(5): 74-82. |
| [22] | BOSWELL R, MYSHAKIN E M, MORIDIS G J, et al. India National Gas Hydrate Program Expedition 02 summary of scientific results: Numerical simulation of reservoir response to depressurization[J]. Marine and Petroleum Geology, 2019, 108: 154-166. |
/
| 〈 |
|
〉 |