Petroleum Reservoir Evaluation and Development ›› 2022, Vol. 12 ›› Issue (5): 784-793.doi: 10.13809/j.cnki.cn32-1825/te.2022.05.010
• Methodological and Theory • Previous Articles Next Articles
LIAO Songlin1(),XIA Yang2,CUI Yinan1,LIU Fangzhi1,CAO Shengjiang1,TANG Yong3
Received:
2021-06-21
Online:
2022-10-26
Published:
2022-09-27
CLC Number:
LIAO Songlin,XIA Yang,CUI Yinan,LIU Fangzhi,CAO Shengjiang,TANG Yong. Variation of crude oil properties with multi-cycle CO2 huff-n-puff of horizontal wells in ultra-low permeability reservoir[J].Petroleum Reservoir Evaluation and Development, 2022, 12(5): 784-793.
Table 2
Well fluid component data of Well-Y prepared in laboratory"
组分 | 摩尔组成 | 组分 | 摩尔组成 | 组分 | 摩尔组成 | ||
---|---|---|---|---|---|---|---|
CO2 | 0.05 | C9 | 2.24 | C21 | 1.37 | ||
N2 | 1.11 | C10 | 2.93 | C22 | 0.91 | ||
C1 | 24.53 | C11 | 2.61 | C23 | 0.91 | ||
C2 | 8.15 | C12 | 1.69 | C24 | 1.01 | ||
C3 | 11.04 | C13 | 1.01 | C25 | 0.96 | ||
iC4 | 1.59 | C14 | 5.12 | C26 | 0.82 | ||
nC4 | 4.06 | C15 | 2.01 | C27 | 0.87 | ||
iC5 | 2.43 | C16 | 1.78 | C28 | 0.82 | ||
nC5 | 2.70 | C17 | 1.78 | C29 | 0.87 | ||
C6 | 1.55 | C18 | 1.05 | C30 | 0.73 | ||
C7 | 0.80 | C19 | 0.46 | C31+ | 5.95 | ||
C8 | 2.73 | C20 | 1.33 |
Table 6
Molar content of each component in oil phase at different time points 8 meters away from the fracture"
吞吐周期 | 生产时间点 | 距裂缝8 m处油相各组分摩尔含量 | ||||||
---|---|---|---|---|---|---|---|---|
N2 | CO2 | C1 | C2—C3 | C4—C6 | C7—C15 | C16—C31+ | ||
第一吞吐周期 | 开始吞吐时 | 0.011 1 | 0.000 5 | 0.245 4 | 0.192 0 | 0.123 3 | 0.211 5 | 0.216 3 |
注CO2结束时 | 0.000 9 | 0.716 6 | 0.023 8 | 0.026 2 | 0.022 8 | 0.077 1 | 0.132 7 | |
焖井结束时 | 0.000 9 | 0.662 3 | 0.025 7 | 0.031 7 | 0.029 7 | 0.100 6 | 0.149 1 | |
生产10 d | 0.001 8 | 0.509 3 | 0.053 9 | 0.068 0 | 0.059 1 | 0.142 3 | 0.165 6 | |
生产1 a | 0.007 0 | 0.226 0 | 0.170 4 | 0.148 2 | 0.098 9 | 0.172 9 | 0.176 6 | |
第二吞吐周期 | 开始吞吐时 | 0.008 3 | 0.165 9 | 0.194 5 | 0.160 8 | 0.105 1 | 0.181 0 | 0.184 5 |
注CO2结束时 | 0.000 6 | 0.712 2 | 0.015 9 | 0.018 9 | 0.018 3 | 0.080 3 | 0.153 9 | |
焖井结束时 | 0.000 7 | 0.664 5 | 0.018 9 | 0.024 5 | 0.024 8 | 0.101 8 | 0.164 9 | |
生产10 d | 0.001 7 | 0.520 5 | 0.049 1 | 0.061 1 | 0.054 4 | 0.141 6 | 0.1716 | |
生产1 a | 0.005 5 | 0.287 5 | 0.141 7 | 0.134 3 | 0.093 5 | 0.167 2 | 0.1703 | |
第三吞吐周期 | 开始吞吐时 | 0.006 6 | 0.229 5 | 0.165 0 | 0.147 8 | 0.099 8 | 0.174 3 | 0.176 9 |
注CO2结束时 | 0.000 3 | 0.710 6 | 0.009 5 | 0.013 2 | 0.014 6 | 0.083 0 | 0.168 8 | |
焖井结束时 | 0.000 4 | 0.665 9 | 0.013 3 | 0.019 0 | 0.021 1 | 0.103 6 | 0.176 7 | |
生产10 d | 0.001 6 | 0.524 8 | 0.046 2 | 0.056 7 | 0.050 7 | 0.141 3 | 0.178 8 | |
生产1 a | 0.004 5 | 0.329 4 | 0.122 2 | 0.124 0 | 0.089 6 | 0.163 8 | 0.166 4 |
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