Oil & Gas Geology ›› 2023, Vol. 44 ›› Issue (5): 1067-1083.doi: 10.11743/ogg20230501
• Petroleum Geology • Previous Articles Next Articles
Jianhui ZENG1,2(), Yaxiong ZHANG3, Zaizhen ZHANG1,2,4, Juncheng QIAO1,2(), Maoyun WANG1,2, Dongxia CHEN1,2, Jingli YAO5, Jingchen DING6, Liang XIONG7, Yazhou LIU1,2, Weibo ZHAO5, Kebo REN1,2
Received:
2022-09-05
Revised:
2023-08-06
Online:
2023-10-19
Published:
2023-10-19
Contact:
Juncheng QIAO
E-mail:zengjh@ cup.edu.cn;Juncheng.Qiao@cup.edu.cn
CLC Number:
Jianhui ZENG, Yaxiong ZHANG, Zaizhen ZHANG, Juncheng QIAO, Maoyun WANG, Dongxia CHEN, Jingli YAO, Jingchen DING, Liang XIONG, Yazhou LIU, Weibo ZHAO, Kebo REN. Complex gas-water contacts in tight sandstone gas reservoirs: Distribution pattern and dominant factors controlling their formation and distribution[J]. Oil & Gas Geology, 2023, 44(5): 1067-1083.
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Table 1
Basic characteristics of various types of gas-water contact in tight sandstone gas reservoirs"
气-水关系类型 | 含气-水特征 | 气-水分布产状 | 储层物性 | 测试结果 | 产能情况 | 测井曲线特征 | 实例 |
---|---|---|---|---|---|---|---|
纯气无水型 | 含气饱和度高,基本不含水 | 气层叠置 | 好 | 气层 | 产气量高,几乎不产水 | 杭锦旗地区锦98井,盒1段 | |
气包水孤立型 | 含水饱和度高,含少量的气 | 气层包围水层 分布 | 好夹差 | 含气-水层 | 产气量高,产水量很小 | 杭锦旗地区锦53井,盒1段 | |
上气下水正常型 | 上部含气饱和度高,下部含水饱和度高 | 上气下水倾斜 分布 | 较好 | 气-水层、 含水气层 | 前期产气量高,后期产水量逐渐增大 | 杭锦旗地区锦39井,盒1段 | |
上水下气倒置型 | 上部含水饱和度高,下部含气饱和度高 | 上水下气倾斜 分布 | 上部差于下部 | 气-水层、 含水气层 | 前期产气量高,后期产水量逐渐增大 | 苏里格地区苏396井,下石盒子组 | |
气-水同层混合型 | 含气和含水饱和度均较高 | 气-水层近水平分布 | 较差 | 气-水层 | 产气量和产水量较高 | 杭锦旗地区锦77井,盒1段 | |
纯水无气型 | 含水饱和度高,基本不含气 | 水层叠置或孤立分布 | 差或较好 | 水层 | 产水量高,几乎不产气 | 杭锦旗地区锦44井,盒1段 |
Table 2
Differences in various types of gas-water contact in tight sandstone gas reservoirs"
气-水关系类型 | 气-水变化规律 | 含气性变化规律 (垂向向上) | 气-水区域分布 | |
---|---|---|---|---|
单井 (垂向向上) | 剖面 (构造低部位至高部位) | |||
上水下气倒置型 | 气层-气-水层-水层 | 气区-气-水过渡区-水区 | 含气饱和度递减 | 气-水分区性明显,存在气-水过渡区 |
上气下水正常型 | 水层-气-水层-气层 | 水区-气-水过渡区-气区 | 含气饱和度递增 | 水区连片分布于气区内部或侧方 |
气包水孤立型 | 气层-气-水层-气层 | 气区-气-水过渡区/水区-气区 | 整体含气饱和度高 | 气-水过渡区或水区零散分布于气区内部 |
气-水同层混合型 | 气层、气-水层和水层交替叠置 | 气区、气-水过渡区、水区交互出现 | 含气饱和度频繁变化,高低起伏大 | 气区、气-水过渡区、水区频繁交互 |
纯气无水型 | 气层叠置 | 气区连续 | 含气饱和度高且稳定 | 气区大面积稳定分布 |
纯水无气型 | 水层叠置 | 水区连续 | 含水饱和度高且稳定 | 水区大面积稳定分布 |
Table 3
Tight sandstone core samples selected for physical simulation experiments of natural gas migration and accumulation"
样品编号 | 层位 | 孔隙度/% | 渗透率/(10-3 μm2) |
---|---|---|---|
1 | 山2段 | 3.46 | 0.042 |
2 | 山2段 | 5.03 | 0.077 |
3 | 山2段 | 6.65 | 0.108 |
4 | 山2段 | 6.46 | 0.186 |
5 | 盒1段 | 6.92 | 0.196 |
6 | 山2段 | 7.00 | 0.212 |
7 | 山2段 | 7.66 | 0.366 |
8 | 山2段 | 6.36 | 0.401 |
9 | 盒2段 | 6.28 | 0.422 |
10 | 山2段 | 6.47 | 0.582 |
11 | 山2段 | 6.67 | 0.645 |
12 | 山2段 | 8.32 | 0.689 |
13 | 山2段 | 8.31 | 0.782 |
14 | 盒3段 | 8.92 | 0.863 |
15 | 山2段 | 9.35 | 0.892 |
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