Study on Safety in Treatment, Transportation and Injection of Carbon Dioxide in Jilin Oilfield,China University of Petroleum (East China) 2010, 09,Shuren Liu,The 3rd World Conference on Safety of Oil and Gas Industry,1/17/2019,2,Contents,Introduction Information of CO2 displacement in Jilin Oilfield Dehydration and Purification Safety Analysis Compression and Liquefaction Safety Analysis Transportation Safety Analysis Injection Safety Analysis Conclusions,1/17/2019,3,Introduction,CO2 is a greenhouse gas. Carbon capture and storage (CCS) is an effective mean to mitigate CO2. Weyburn project: Canada, first commercial example, started in 2000, inject 5000ton CO2/d, enhanced oil recovery by 16%. Sleipner project: Norway, started in 1996, inject 2800ton/d,1/17/2019,4,Introduction,Weyburn project,Sleipner project,1/17/2019,5,Introduction,CO2 capture, treatment, transportation and injection technologies attract interest. CO2 displacement in Jilin oilfield (China) started many years ago. Matching technologies have been formed Using natural associated CO2 for EOR is performing,1/17/2019,6,Introduction,This paper has focused on Analyze safety problems and causes in treatment, transportation and injection of CO2 in Jilin oilfield Put forward well-targeted, technically feasible and economically reasonable safety countermeasure suggestions,1/17/2019,7,Information of CO2 Displacement,Figure 1 Procedure of the surface CO2 gathering and transporting system 1-Changshen 4 gas well 2-Gas gathering station 3-Dehydration unit 4-Liquefaction unit 5-Storage tank 6-Booster pump 7-8km pipeline 8-Injection station 9-Injection wells,1/17/2019,8,Dehydration and Purification Safety Analysis,Molecular sieve dehydration technology is used to dehydrate CO2 in Jilin oilfield Corrosion Results leakage explosion and other accidents Measures adding corrosion inhibitors coating on the adsorption tower,1/17/2019,9,Hydrate Results Limiting flow rate Reducing processing gas volume Blocking pipelines Measures adding hydrate inhibitors increasing gas temperature,Dehydration and Purification Safety Analysis,1/17/2019,10,Low temperature and low pressure liquefaction technology is used in the CO2 liquefaction Jilin oilfield adopts the liquid ammonia refrigerating machine system,Compression and Liquefaction Safety Analysis,1/17/2019,11,Leakage of liquid ammonia Results poisoning burning or explosion Measures inflammable gas detector dress,Compression and Liquefaction Safety Analysis,1/17/2019,12,Transportation Safety Analysis,8km pipeline goes through residential areas, farmland and other areas of intensive human activities. Cause failure of pressure relief valve, bad sealing performance of welds, gaskets and valves, corrosion, external forces and so on,1/17/2019,13,Results Pipeline rupture Leakage Measures Automatic control system Mercaptan and other additives,Transportation Safety Analysis,1/17/2019,14,Injection Safety Analysis,Leakage of carbon dioxide through injection well strings Cement bond logging Tracer Ultrasonic detector Corrosion of injection strings Multi-arm caliper Electromagnetic thickness measurement tools Underground imaging device adding corrosion inhibition, using anti-corrosion steel pipe and coating of tubing,1/17/2019,15,Conclusions,Analyzed the safety problems caused by CO2 phase change, such as CO2 corrosion, hydrate plugging, gas leakage Put forward effective measures to strengthen the safety of pipeline, station equipment, automatic control system and other aspects of management.,1/17/2019,16,Acknowledgement,Important National Science & Technology Specific Projects of China Organizing Committee of the 3rd World Conference on Safety of Oil and Gas Industry,1/17/2019,17,Thanks for your attention!,