Oil & Gas Geology ›› 2024, Vol. 45 ›› Issue (1): 200-214.doi: 10.11743/ogg20240114
• Petroleum Geology • Previous Articles Next Articles
Zhili ZHANG1(), Yanping QIAO1, Shuang DOU1, Kunyu LI1(), Yuan ZHONG1, Luya WU1, Baoshou ZHANG1, Xin Dai1, Xin JIN2, Bin WANG2, Jinmin SONG2
Received:
2023-09-02
Revised:
2023-12-07
Online:
2024-02-01
Published:
2024-02-29
Contact:
Kunyu LI
E-mail:zzl_kyy@petrochina.com.cn;likunyu2018@petrochina.com.cn
CLC Number:
Zhili ZHANG, Yanping QIAO, Shuang DOU, Kunyu LI, Yuan ZHONG, Luya WU, Baoshou ZHANG, Xin Dai, Xin JIN, Bin WANG, Jinmin SONG. Karst paleogeomorphology and reservoir control model of the 2nd member of Dengying Formation in Penglai gas area, Sichuan Basin, China[J]. Oil & Gas Geology, 2024, 45(1): 200-214.
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Table 2
Classification of the karst paleogeomorphology in the Deng 2 Member, Penglai gas area, Sichuan Basin[37, 41]"
古地貌单元 | 划分标准 | 岩溶流体 | 岩溶带 | 地貌主成因 | |
---|---|---|---|---|---|
一级 | 二级 | ||||
岩溶高地 | 残丘 | 整体呈丘状,底部直径<20 km | 大气淡水淋滤 | 发育垂直渗流带 | 风化-溶蚀作用 |
浅凹 | 高地内部相对低洼的凹陷区,内部较为平缓,坡降≤1% | 地表径流 | 溶蚀作用 | ||
高地平原 | 高地内部地势平坦的区域,坡降<0.5 % | 大气淡水淋滤 | 溶蚀作用 | ||
岩溶斜坡 | 岩溶陡坡 | 大范围分布的陡坡,坡降>5 % | 地下径流 | 发育水平潜流带 | 溶蚀-侵蚀作用 |
岩溶缓坡 | 大范围分布的缓坡,2 %≤坡降≤5 % | 溶蚀-侵蚀作用 | |||
岩溶洼地 | — | 盆地内的相对低洼区,最大开口直径>20 km | 地表径流 | 岩溶带欠发育 | 溶蚀-沉淀作用 |
岩溶盆地 | — | 主要在川西北盆地边缘地带,为盆地内最高程最低的区域,与广海相连 | 停滞水 | 岩溶带不发育 | 沉淀作用 |
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