Oil & Gas Geology ›› 2020, Vol. 41 ›› Issue (2): 380-392, 422.doi: 10.11743/ogg20200214
• Petroleum Geology • Previous Articles Next Articles
Zhemin Hao1,2(), Guoming Xu2, Hongde Chen3, Qiongxian Wang2, Ke Long2, Wenkai Wang2, Qiang Wang4
Received:
2019-07-07
Online:
2020-04-28
Published:
2020-04-03
CLC Number:
Zhemin Hao, Guoming Xu, Hongde Chen, Qiongxian Wang, Ke Long, Wenkai Wang, Qiang Wang. Pore classification and thin section porosity quantification of reservoir in the T2l4(3) in Majing area, Western Sichuan Basin[J]. Oil & Gas Geology, 2020, 41(2): 380-392, 422.
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Table 1
The porosity and permeability of T2l4-3 in Well A1, Majing area, Western Sichuan Depression"
储层段 | 储层岩石类型 | 累计厚度/m | 孔隙度/% | 渗透率/(10-3μm2) |
上储层段 | 颗粒晶粒白云岩 | 2.5 | 0.61~9.38(6)/3.47 | 1.01(1) |
晶粒白云岩 | 0.4 | 1.26~2.32(2)/1.79 | — | |
颗粒晶粒(含)白云质灰岩 | 6.5 | 1.00~3.93(6)/1.74 | 0.006~0.007(2)/0.007 | |
晶粒颗粒白云岩 | 0.8 | 0.52~1.81(9)/1.00 | — | |
晶粒颗粒灰岩 | 1.1 | 0.50~2.10(4)/1.58 | — | |
下储层段 | (含)灰质白云岩 | 9.2 | 1.15~7.17(13)/3.09 | 0.005(1) |
晶粒白云岩 | 5.6 | 2.02~7.21(9)/4.14 | 0.004(1) | |
晶粒颗粒白云岩 | 22.6 | 1.45~8.01(38)/3.81 | 0.011~1.011(3)/0.345 | |
颗粒晶粒白云岩 | 15.7 | 1.17~4.56(17)/2.57 | 0.017~0.243(5)/0.057 |
"
储集空间类型 | 沉积相类型 | 岩石类型 |
晶间(溶)孔 | 云坪、藻砂屑滩、藻云坪、含灰云坪、含云藻灰坪 | 晶粒白云岩、晶粒颗粒白云岩、颗粒晶粒白云岩、(含)灰质白云岩、晶粒颗粒(含)云质灰岩、晶粒颗粒灰岩 |
粒间(溶)孔 | 云坪、藻云坪、含灰藻云坪 | 晶粒颗粒白云岩、颗粒晶粒白云岩 |
粒内(溶)孔 | 藻云坪、含灰云坪、含灰藻云坪、藻砂屑滩 | 晶粒颗粒白云岩、颗粒晶粒白云岩、(含)灰质白云岩 |
铸模孔 | 云坪、藻云坪 | 晶粒颗粒白云岩、颗粒晶粒白云岩 |
格架孔 | 云坪、含灰藻云坪 | 晶粒白云岩、晶粒颗粒白云岩 |
窗格孔 | 云坪、含灰藻云坪 | 颗粒晶粒白云岩、(含)灰质白云岩 |
裂缝 | 藻灰坪、含灰云坪、含云藻灰坪、藻砂屑滩 | 晶粒颗粒灰岩、(含)灰质白云岩、颗粒晶粒白云岩、晶粒颗粒白云岩 |
溶缝 | 含云藻灰坪、藻灰坪、藻云坪、云坪 | 晶粒颗粒灰岩、(含)灰质白云岩、晶粒颗粒(含)云质灰岩、晶粒颗粒白云岩 |
Table 3
Average thin section porosity vs.average porosity tested of theT2l4-3 in Well A1, Majing area, Western Sichuan Depression"
岩石类型 | 储层段 | 平均面孔率/% | 平均孔隙度/% |
晶粒颗粒白云岩 | 上储层段 | 4.53(n=6) | 1.00(n=9) |
下储层段 | 3.81(n=50) | 3.81(n=38) | |
上+下储层段 | 3.82(n=56) | 3.32(n=47) | |
颗粒晶粒白云岩 | 上储层段 | 3.58(n=8) | 3.47(n=6) |
下储层段 | 4.66(n=7) | 2.57(n=17) | |
上+下储层段 | 3.12(n=15) | 2.91(n=23) | |
晶粒白云岩 | 上储层段 | 4.77(n=3) | 1.79(n=2) |
下储层段 | 4.25(n=10) | 4.14(n=9) | |
上+下储层段 | 4.34(n=13) | 3.55(n=11) | |
(含)白云质灰岩 | 上储层段 | 2.45(n=10) | 1.74(n=6) |
晶粒颗粒灰岩 | 上储层段 | 4.37(n=6) | 1.58(n=4) |
(含)灰质白云岩 | 下储层段 | 6.10(n=8) | 3.09(n=13) |
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