CO 2 storage potential and trapping mechanisms in the H-59 block of Jilin oilfield China

Abstract A CO 2 EOR and storage pilot test have been conducted in the H-59 block of Jilin oilfield China for well seven years. It is important to track the CO 2 storage and distribution in the reservoir, which can provide valuable guidance for the operation in the next stage of the project. In this paper, the CO 2 storage capacity in the H-59 block was calculated by considering various CO 2 trapping mechanisms, and the distribution and trapping status of the stored CO 2 were evaluated by using the reservoir simulation method. The effective CO 2 storage capacity in the H-59 block is estimated to be 26.37 × 10 4  ton by incorporating the CO 2 sweep efficiency and neglecting the mineral trapping. Up to June 2014, 21.08 × 10 4 ton of CO 2 has been injected with over 95% stored. The geological structure of the H-59 block controls most of the injected CO 2 moving only along the horizontal direction in the thin oil layers. The shape and size of the CO 2 plume are mainly determined by the reservoir heterogeneity, well pattern and injected CO 2 amount. According to the assessment results, the CO 2 sweep efficiency within each well group varies from 20% to 80%. About 42.68–60.15% of the stored CO 2 has been trapped at supercritical state accompanied with 24.85–41.8% and 15% of the stored CO 2 dissolved in residual oil and water, respectively. The H-59 block still has a potentially remaining capacity of 6.25 × 10 4 ton of CO 2 for the future storage. Necessary engineering measures might be taken to further increase the sweep and displacement efficiencies of CO 2 to achieve this purpose.

[1]  Christopher A. Rochelle,et al.  Modelling CO2 solubility in pure water and NaCl-type waters from 0 to 300 °C and from 1 to 300 bar: Application to the Utsira Formation at Sleipner , 2005 .

[2]  B. Tohidi,et al.  CO2 Eor and Storage in Oil Reservoir , 2005 .

[3]  Liao Xinwei,et al.  Methodology for estimation of CO2 storage capacity in reservoirs , 2009 .

[4]  Liang Zhang,et al.  CO2 EOR and storage in Jilin oilfield China: Monitoring program and preliminary results , 2015 .

[5]  Liang Zhang,et al.  CO 2 storage safety and leakage monitoring in the CCS demonstration project of Jilin oilfield, China , 2014 .

[6]  Bo Ren,et al.  Performance evaluation and mechanisms study of near-miscible CO2 flooding in a tight oil reservoir of Jilin Oilfield China , 2015 .

[7]  Zhenhao Duan,et al.  An improved model calculating CO2 solubility in pure water and aqueous NaCl solutions from 273 to 533 K and from 0 to 2000 bar , 2003 .

[8]  Don White,et al.  Toward quantitative CO2 storage estimates from time-lapse 3D seismic travel times: An example from the IEA GHG Weyburn–Midale CO2 monitoring and storage project , 2013 .

[9]  Lu Shuangfang,et al.  Forecasting model of solubility of CH4, CO2 and N2 in crude oil , 2005 .

[10]  Bo Ren,et al.  Monitoring on CO2 migration in a tight oil reservoir during CCS-EOR in Jilin Oilfield China , 2016 .

[11]  B. Tohidi,et al.  CO2 Injection for Enhanced Gas Recovery and Geo-Storage: Reservoir Simulation and Economics , 2005 .

[12]  John L. Bradshaw,et al.  CO2 storage capacity estimation: Methodology and gaps , 2007 .

[13]  Liang Zhang,et al.  CO2 geological storage into a lateral aquifer of an offshore gas field in the South China Sea: storage safety and project design , 2015, Frontiers of Earth Science.

[14]  Stefan Bachu,et al.  CO2 storage in oil and gas reservoirs in western Canada: Effect of aquifers, potential for CO2-flood enhanced oil recovery and practical capacity , 2005 .

[15]  Liang Zhang,et al.  Monitoring on CO2 Migration in a Tight Oil Reservoir during CO2-EOR Process , 2015 .

[16]  Stefan Bachu,et al.  Screening, Evaluation, and Ranking of Oil Reservoirs Suitable for CO2-Flood EOR and Carbon Dioxide Sequestration , 2002 .

[17]  Zhang Liang,et al.  Assessment of CO2 EOR and its geo-storage potential in mature oil reservoirs, Shengli Oilfield, China , 2009 .

[18]  L. André,et al.  Numerical modeling of fluid–rock chemical interactions at the supercritical CO2–liquid interface during CO2 injection into a carbonate reservoir, the Dogger aquifer (Paris Basin, France) , 2007 .

[19]  Jishun Qin,et al.  Application and enlightenment of carbon dioxide flooding in the United States of America , 2015 .

[20]  Zhang Weidong,et al.  Assessment of CO2 storage capacity in oil reservoirs associated with large lateral/underlying aquifers: Case studies from China , 2011 .

[21]  Andy Chadwick,et al.  Best practice for the storage of CO2 in saline aquifers - observations and guidelines from the SACS and CO2STORE projects , 2008 .

[22]  Rick Chalaturnyk,et al.  IEA GHG Weyburn CO2 monitoring and storage project , 2005 .

[23]  K. Pruess,et al.  Analysis of mineral trapping for CO2 disposal in deep aquifers , 2001 .

[24]  Ali Mohebbi,et al.  Prediction of Oil Recovery Factor in CO2 Injection Process , 2014 .

[25]  D. Vasco,et al.  Coupled reservoir-geomechanical analysis of CO2 injection and ground deformations at In Salah, Algeria , 2010 .

[26]  E. Kreft,et al.  K12-B a test site for CO2 storage and enhanced gas recovery , 2005 .

[27]  Zhenhao Duan,et al.  An improved model for the calculation of CO2 solubility in aqueous solutions containing Na+, K+, Ca2+, Mg2+, Cl−, and SO42− , 2006 .

[28]  Hui Zhang,et al.  Monitoring on CO2 EOR and Storage in a CCS Demonstration Project of Jilin Oilfield China , 2011 .

[29]  T Maldal,et al.  CO2 underground storage for Snøhvit gas field development , 2004 .

[30]  Stefan Bachu,et al.  Evaluation of the CO 2 Sequestration Capacity in Alberta's Oil and Gas Reservoirs at Depletion and the Effect of Underlying Aquifers , 2003 .

[31]  Stefan Bachu,et al.  Estimation of Oil Recovery and CO2 Storage Capacity in CO2 EOR Incorporating the Effect of Underlying Aquifers , 2004 .

[32]  L. V. D. Meer,et al.  Monitoring of CO2 injected at Sleipner using time-lapse seismic data , 2004 .