Optimization analysis of factors affecting hydrocarbon gas drive based on orthogonal experimental design

다국어 초록 (Multilingual Abstract)

To improve the ultimate recovery of reservoirs and to increase the economic benefit of oilfields, we feel obliged to study on various factors affecting the development effect of hydrocarbon gas injection and its influence in terms of ultimate recovery. Thus, we can formulate a reasonable and feasible scheme on effective implementation of hydrocarbon gas drive. Take Q28 fault-block as an example; five main factors affecting the development effect of hydrocarbon gas injection have been screened out, four different levels of each influence factor has been set up; the orthogonal experiment method has been adopted to design 16 different combination schemes of 5 factors. Numerical reservoir simulation predicted the final recovery under the different combination schemes. Following are the range analysis and variance analysis of entire results so that the major and minor factors affecting the final recovery and the best range of each factor can be confirmed. The order sequence from major to minor factors: gas injection slug size, gas injection time, gas–water ratio, pressure level, and injection rate. This method is significant on its guidance for hydrocarbon gas injection in this area.

참고문헌 (Reference)

1 Gary, R. J., "Timing of miscible hydrocarbon gas injection afterwaterflooding, PaperNo. SPE59341" 3-5, 2000

2 Liu, C. Z., "Study on the basic conditions of natural gas flooding" 21 : 38-41, 1997

3 Li, S. L., "Strengthen gas injection for enhanced oil recovery" 22 : 41-45, 2000

4 Daniel, D., "Screening criteria for application of carbon dioxide miscible displacement in waterflooded reservoirs containing light oil, Paper No. SPE 35431" 21-24, 1996

5 Christensen, J. R., "Review of WAG field experience" 4 : 97-106, 2001

6 Lawrence, J. J., "Reservoir simulation of gas injection processes, Paper No. SPE 81459" 5-8, 2003

7 Wu, J., "Orthogonal array designs for the optimization of liquid–liquid–liquid microextraction of nonsteroidal anti-inflammatory drugs combined with highperformance liquid chromatography-ultraviolet detection" 1092 : 182-190, 2005

8 Cui, C. W., "Orthogonal analysis for perovskite structure microwave dielectric ceramic thin films fabricated by the RF magnetron-sputtering method" 21 : 349-354, 2010

9 Wu, X., "Optimization of biodiesel production from camelina oil using orthogonal experiment" 88 : 3615-3624, 2011

10 Moridis, G. J., "Numerical studies of gas production from several CH4 hydrate zones at the Mallik site, Mackenzie Delta, Canada" 43 : 219-238, 2004

11 Zhang, Y. Y., "Influential factors on immiscible water alternating natural gas displacement after water flooding" 29 : 60-63, 2005

12 Hustad, O. S., "Gravity stable displacement of oil by hydrocarbon gas after waterflooding" 22-24, 1992

13 Blunt, M., "Carbon dioxide in enhanced oil recovery" 34 : 1197-1204, 1993