Oil & Gas Geology ›› 2023, Vol. 44 ›› Issue (1): 34-45.doi: 10.11743/ogg20230103
• Petroleum Geology • Previous Articles Next Articles
Jian LI1,2(), Chunlong YANG1,2(), Wuren XIE1, Yurun RUI3, Xiaobo WANG1,2, Lu ZHANG1,2, Zengye XIE1,2, Zeqing GUO1
Received:
2022-06-06
Revised:
2022-11-15
Online:
2023-01-14
Published:
2023-01-13
Contact:
Chunlong YANG
E-mail:lijian69@petrochina.com.cn;yangchunlong69@petrochina.com.cn
CLC Number:
Jian LI, Chunlong YANG, Wuren XIE, Yurun RUI, Xiaobo WANG, Lu ZHANG, Zengye XIE, Zeqing GUO. Differences of natural gas accumulation and play fairways in the marginal zone and interior of Sinian platform in Anyue gas field, Sichuan Basin[J]. Oil & Gas Geology, 2023, 44(1): 34-45.
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Table 1
Comparison of geochemical parameters of the Sinian source rocks in the Sichuan Basin"
层系 | 岩性 | TOC/% | EqVRo/% | 裂陷槽厚度/m | 台内厚度/m | δ13C干酪根/‰ | 资料来源 | |
---|---|---|---|---|---|---|---|---|
寒武系 | 筇竹寺组 | 泥页岩 | 0.50~8.49(1.95) | 1.84~2.40 | 50~300 | 40~120 | -36.0~-31.0(-33.3) | 文献[ |
震旦系 | 灯三段 | 泥岩 | 0.50~4.73(0.87) | 3.16~3.21 | 5~30 | 5~25 | -33.4~-28.5(-32.0) | 文献[ |
灯影组 | 藻云岩 | 0.20~3.67(0.61) | 1.97~3.46 | 100~300 | 200~300 | -32.8~-23.8(-29.4) | 文献[ | |
陡山沱组 | 泥岩 | 0.50~14.17(2.91) | 2.08~3.82 | 10~30 | 0~10 | -31.5~-30.3(-30.8) | 文献[ |
Table 2
Differences of Deng 4 Member reservoir between the platform marginal zone and interior in Anyue gas field"
相区 | 储层岩性 | 物性、孔洞 发育程度 | 储集空间类型 | 储层厚度 | 丘滩体 占地层比 | 表生岩溶强度 | 单井产量 / m3/d |
---|---|---|---|---|---|---|---|
台缘带 | 砂屑云岩、 藻凝块云岩、 藻叠层云岩 | 孔洞发育程度高,孔喉结构好,物性较好 | 溶孔、 裂缝- 孔洞 | 单层厚度普遍大,累计 厚度60~130 m | 丘滩体发育,厚度 占地层比>50 % | 强度大,影响 深度达200 m | >10×104 |
台内 地区 | 凝块云岩、 砂屑云岩、 藻纹层云岩 | 孔洞发育程度低,孔喉结构差,物性变差 | 裂缝- 孔洞 | 单层厚度较小,累计厚度30~50 m | 丘滩体欠发育, 厚度占地层比 为30 %~50 % | 强度中等,影响深度<100 m | <10×104 |
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