Oil & Gas Geology ›› 2024, Vol. 45 ›› Issue (2): 309-326.doi: 10.11743/ogg20240201
• Petroleum Geology • Previous Articles Next Articles
Caineng ZOU1,2,3(), Dazhong DONG1,2, Wei XIONG1,2, Guoyou FU3,4, Qun ZHAO1,2, Wen LIU1, Weiliang KONG1, Qin ZHANG1, Guangyin CAI1, Yuman WANG1, Feng LIANG1, Hanlin LIU1, Zhen QIU1,2()
Received:
2024-03-22
Revised:
2024-04-06
Online:
2024-04-30
Published:
2024-04-30
Contact:
Zhen QIU
E-mail:zcn@petrochina.com.cn;qiuzhen316@163.com
CLC Number:
Caineng ZOU, Dazhong DONG, Wei XIONG, Guoyou FU, Qun ZHAO, Wen LIU, Weiliang KONG, Qin ZHANG, Guangyin CAI, Yuman WANG, Feng LIANG, Hanlin LIU, Zhen QIU. Advances, challenges, and countermeasures in shale gas exploration of underexplored plays, sequences and new types in China[J]. Oil & Gas Geology, 2024, 45(2): 309-326.
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Table 1
Statistics of discoveries in shale gas exploration in the three new fields within onshore regions of China"
盆地或区域 | “三新”类型 | 地区/构造 | 井号 | 井深/m | 层位 | 测试产量/(104 m3/d) |
---|---|---|---|---|---|---|
四川 盆地 | 新层系、 新类型 | 井研—犍为地区 | 金石103HF | 4 683.00 | 筇竹寺组 | 25.86 |
威远地区 | 资201 | 6 600.00 | 筇竹寺组 | 73.88 | ||
新领域、 新区带 | 威荣地区 | 威页1 | 3 500.00 ~ 4 500.00 | 五峰组-龙马溪组 | 17.50 | |
泸州地区 | 泸203 | 3 866.70 | 五峰组-龙马溪组 | 137.90 | ||
渝西地区 | 足202H1 | 3 925.50 | 五峰组-龙马溪组 | 45.67 | ||
黄202 | 4 086.10 | 五峰组-龙马溪组 | 22.37 | |||
永川地区 | 永页1等6口井 | 3 700.00 ~ 4 300.00 | 五峰组-龙马溪组 | 8.00 ~ 14.00 | ||
丁山- 东溪区带 | 东页深1HF 等4口井 | 3 800.00 ~ 4 500.00 | 五峰组-龙马溪组 | 5.00 ~ 31.20 | ||
太阳- 大寨背斜 | Y1 | 976.20 ~ 986.00 | 五峰组-龙马溪组 | 1.10 | ||
Y102 | 768.50 ~ 778.80 | 五峰组-龙马溪组 | 0.59 | |||
海坝背斜 | Y153H1平台 | 480.00 ~ 560.00 | 五峰组-龙马溪组 | 4.50 ~ 6.10 | ||
新层系、 新类型 | 华蓥山区带 | 华地1 | 1 288.80 ~ 1 337.20 | 龙马溪组 | 0.30 ~ 0.50 | |
宣汉—达县地区 | 雷页1 | 4 000.00 | 大隆组 | 42.66 | ||
七里峡构造 | 罐36 | 3 631.00 | 吴家坪组 | 1.20 | ||
梁平地区 | 大页1 | 6 037.00 | 吴家坪组 | 32.06 | ||
红星地区 | 红页1HF—红页4HF | 3 300.00 | 吴家坪组 | 8.90 ~ 15.20 | ||
红页1平台 | 3 300.00 | 茅口组-吴家坪组 | 6.08 | |||
红页茅1HF | 5 727.00 | 茅口组 | 6.45 | |||
南江区块 | 乐坝1 | 5831.00 | 大隆组 | 6.17 | ||
普光气田 | 普陆页1 | 3 190.00 ~ 3 460.00 | 千佛崖组 | 10.40 | ||
拔山寺向斜 | 泰页1 | 2 386.00 ~ 2 624.00 | 凉高山组 | 7.50 | ||
平昌地区 | 平安1 | 2 850.00 ~ 3 015.00 | 凉高山组 | 11.45 | ||
元坝区带 | 元坝21 | 4 010.00 ~ 4033.00 | 自流井组大安寨段 | 50.70 | ||
龙岗区块 | 龙浅2 | 2 128.00 ~ 2 146.00 | 自流井组大安寨段 | 0.30 | ||
涪陵区块 | 涪页HF-1 | 3 570.00 ~ 3 722.00 | 自流井组大安寨段 | 1.70 | ||
建南地区 | 建页HF-1 | 1 777.77 | 自流井组东岳庙段 | 1.20 | ||
鄂尔多斯 盆地 | 新层系、 新类型、 新区带 | 马家滩区块 | 忠平1 | 4 165.00 ~ 4 285.00 | 乌拉力克组 | 26.48 |
李99 | 4 432.41 ~ 4434.55 | 乌拉力克组 | 4.20 | |||
大宁—吉县地区 | 大吉51(吉平1H) | 2 265.50 ~ 2 302.50 | 山西组 | 7.97 | ||
其他 地区 | 新层系、 新区带 | 正安向斜 | 安页1 | 2 302.00 ~ 2 325.48 | 石牛栏组 五峰组-龙马溪组 | 10.22 100 ~ 2.36 |
狮溪向斜 | 狮溪1 | 1356.00 | 五峰组-龙马溪组 | 1.19 ~ 2.86 | ||
桴焉复向斜 | 瑞溪1、瑞溪2 | 426.00 ~ 762.00 | 五峰组-龙马溪组 | 1.06 ~ 2.37 | ||
大关— 永善地区 | 云大页1 | 1 998.00 ~ 2 088.00 | 五峰组-龙马溪组 | 0.53 | ||
新层系、 新类型、 新区带 | 宜昌区块 | 鄂宜页1、 鄂阳页1HF等6口井 | 1 874.00 ~ 2 389.00 3 343.00 ~ 5 179.00 | 陡山沱组-水井沱组- 龙马溪组 | 5.53 ~ 7.83 | |
丹寨区块 | 贵丹地1 | 535.00 ~ 1 080.00 | 乌训组-陡山沱组 | — | ||
玉皇洞向斜 | 黔水地1 | 2 500.00 | 打屋坝组 | 1.10 | ||
黔南坳陷 | 黔紫页1 | 2 664.00 ~ 2 983.00 | 打屋坝组 | — | ||
柳城北区块 | 桂融页2-1HF | 1 857.00 ~ 3 657.00 | 鹿寨组 | — |
Table 2
Statistics of resources within shale gas play fairways in the three new fields within the Sichuan Basin"
“三新”类型 | 区带 | 层位 | 面积/ km2 | 资源量/ (108 m3) |
---|---|---|---|---|
新类型 | 自210井区 | 五峰组-龙马溪组 | 220 | 1 100 |
宜202井区 | 260 | 1 300 | ||
自205井区 | 200 | 1 200 | ||
泸州中区 | 790 | 7 000 | ||
足202-203井区 | 160 | 800 | ||
新层系- 新类型 | 威远构造东翼 | 筇竹寺组 | 3 000 | 20 000 |
井研-犍为区块 | 600 | 3 878 | ||
龙门潜伏构造 | 吴家坪组 | 30 000 | 60 000 | |
宣汉—达县地区 | 大隆组 | 4 220 | 12 000 | |
红星地区 | 吴家坪组-茅口组 | 9 480 | 47 600 | |
马家滩—银洞子地区 | 乌拉力克组 | 9 000 | 10 000 | |
新层系- 新区带 | 宜昌地区 | 五峰组-龙马溪组 | 3 039 | 15 000 |
道真地区 | 368 | 1 914 | ||
遵义地区 | 695 | 200 ~ 300 | ||
大关木杆—寿山地区 | 333 | 1 400 | ||
柳城北、鹿寨地区 | 鹿寨组、 榴江组 | 122 | 2 100 |
Table 3
Characteristics and resource potential of shale gas plays in key areas on the periphery of the Sichuan Basin"
有利层段类型 | 地区 | 典型井 | 层位 | 岩石类型 | TOC/% | Ro/% | 含气量/ (m3/t) | 测试产量/ (104 m3/d) |
---|---|---|---|---|---|---|---|---|
富有机质页岩层段 | 川南 | 宁201 泸203 | 五峰组-龙马溪组 | 富有机质页岩 | 2.50 ~ 8.50 | 2.50 ~ 3.80 | 2.00 ~ 6.00 | 15.00 ~ 137.90 |
涪陵 | 焦页1 | 五峰组-龙马溪组 | 富有机质页岩 | 2.00 ~ 8.00 | 2.65 | 1.30 ~ 6.30 | 20.30 | |
“富气” 贫有机页岩层段 | 乐山—龙女寺 | 金石103 | 筇竹寺组 | 页岩夹粉砂岩 | <2.00 | 3.15 ~ 3.26 | 0.13 ~ 3.30 | 25.86 |
仪陇—平昌 | 平安1 普陆页1 | 凉高山组 | 页岩夹粉砂岩、细砂岩 | 0.57 ~ 2.56 (1.35) | 1.51 ~ 1.61 (1.55) | 0.53 ~ 3.38 (1.58) | 10.40 ~ 11.45 | |
马家滩南 | 忠4 忠平1 | 乌拉力克组 | 裂缝型灰质 页岩 | 0.12 ~ 1.32 (0.63) | 0.80 ~ 2.50 (1.83) | 0.76 ~ 2.46 (1.65) | 26.48 |
Table 4
Statistics of shale gas resources in the three new fields in China’s major basins"
盆地 | 类型 | 层系 | 资源量/(108 m3) | 可采资源量/(108 m3) | |
---|---|---|---|---|---|
四川盆地 | 陆相 | 侏罗系 | 6 600.80 | 990.12 | |
海-陆过渡相/海相 | 吴家坪组/龙潭组 | 34 440.00 | 8 610.00 | ||
海相 | 五峰组-龙马溪组 | 埋深≤4 500 m | 126 648.08 | 31 662.02 | |
埋深>4 500 m | 66 753.70 | 16 688.43 | |||
筇竹寺组 | 埋深≤4 500 m | 24 353.01 | 4 870.60 | ||
埋深>4 500 m | 23 985.00 | 4 797.00 | |||
鄂尔多斯盆地 | 海-陆过渡相 | 山西组 | 16 000.00~26 000.00 | 2 400.00~3 900.00 | |
海相 | 乌拉力克组 | 10 000.00 | 1 500.00 |
Table 5
Comparison of geological characteristics of typical shales between China and the United States"
主要地质特征 | 主要页岩名称 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Marcellus页岩 | Utica页岩 | Barnett页岩 | Eagle Ford页岩 | Fayetteville页岩 | Haynesville页岩 | WoodFord页岩 | Duvernay页岩 | 五峰组- 龙马溪组页岩 | 筇竹寺组页岩 | 吴家坪组页岩 | 乌拉力克组页岩 | |
盆地 | 阿巴拉契亚盆地 | 阿巴拉契亚盆地 | 福特沃斯堡盆地 | 西墨西哥湾盆地 | 阿科马盆地 | 路易斯安那盆地 | 阿纳达科/阿科马盆地 | 西加拿大盆地 | 四川盆地 | 四川盆地 | 四川盆地 | 鄂尔多斯盆地 |
盆地 类型 | 早古生代 前陆盆地 | 早古生代 前陆盆地 | 晚古生代 弧后前陆盆地 | 克拉通盆地 | 弧形地堑 | — | 克拉通盆地 | 稳定克 拉通盆地 | 克拉通盆地 | 裂陷槽 | 海槽 | 克拉通盆地 |
页岩时代 | D2 | O3 | C1 | K3 | C1 | J3 | D3-C1 | D3 | O3-S1 | Є1 | P3 | O3 |
页岩气发现 年份 | 1880 | 2010 | 1981 | 2008 | 2004 | 2004 | 2003 | 2012 | 2010 | 2019 | 2021 | 2019 |
气田面积/ (104 km2) | 24.60 | 24.60 | 1.30 | 3.00 | 0.69 | 2.33 | 2.85 | 2.43 | 4.94 | 1.00 | 3.00 | 2.50 |
构造特征 | 简单,宽缓斜坡 | 简单,宽缓斜坡 | 前陆斜坡 | 宽缓大斜坡 | 复杂构造 | 大型负向构造 | 简单-复杂 | 简单 | 多期构造叠合 | 多期构造叠合 | 多期构造叠合 | 多期构造叠合 |
断裂特征 | 主体无大断裂 | — | — | — | 正断层为主 | — | — | — | 盆缘断裂发育 | — | — | 断裂发育区 |
气层埋深/m | 914 ~ 2 600 | 1 350 ~ 2 800 | 1 000 ~ 2 600 | 1 200 ~ 4 300 | 450 ~ 2 590 | 3 300 ~ 5 300 | 1 830 ~ 3 350 | 3 100 ~ 4 100 | 500 ~ 6 000 | 3 250 ~ 5 500 | 3 000 ~ 4 500 | 3 700 ~ 4 500 |
地层厚度/m | 0 ~ 274 | — | 90 ~ 152 | 90 ~ 152 | — | 10 ~ 120 | >60 | 33 ~ 55 | 0 ~ 650 | 300 ~ 500 | 50 ~ 140 | 40 ~ 140 |
岩相类型 | 黑色页岩 | 钙质页岩 | 硅质页岩 | 富生物 钙质页岩 | 黑色页岩 | 硅质、 钙质页岩 | 钙质、硅质纹层状 页岩 | 富沥青质 页岩 | 硅质、钙质 页岩 | 粉砂质页岩 | 钙质页岩 | 硅质、 钙质页岩 |
储层厚度/m | 15 ~ 60 | 15 ~ 60 | 15 ~ 60 | 15 ~ 152 | 15 ~ 170 | 10 ~ 120 | 36 ~ 67 | 9 ~ 50 | 20 ~ 90 | 60 ~ 135 | 20 ~ 60 | 20 ~ 40 |
TOC/% | 3.00 ~ 15.00 | 1.00 ~ 8.00 | 4.00 ~ 8.00 | 2.00 ~ 12.00 | 4.04 | 0.28 ~ 6.20 | 5.01 ~ 14.81 | 2.00 ~ 11.00 | 2.00 ~ 5.00 | 4.00 ~ 8.00 | 2.80 ~ 7.48 | 0.43 ~ 1.52 |
有机质类型 | Ⅰ-Ⅱ | Ⅰ | Ⅱ | Ⅱ-Ⅲ | Ⅲ-Ⅳ | Ⅱ | Ⅰ-Ⅱ | Ⅱ-Ⅲ | Ⅰ | Ⅰ-Ⅱ1 | Ⅰ-Ⅱ1 | Ⅰ-Ⅱ1 |
Ro/% | 1.50 ~ 3.50 | 0.50 ~ 4.93 | 0.70 ~ 1.70 | 0.56 ~ 1.40 | — | 2.20 ~ 3.20 | 1.10 ~ 2.45 | 1.10 ~ 1.60 | 2.10 ~ 4.00 | 3.20 ~ 5.00 | 2.00 ~ 2.80 | 0.80 ~ 3.50 |
脆性矿物 含量/% | >50.00 | >50.00 | — | 40.00 ~ 85.00 | 55.00 ~ 70.00 | 50.00 ~ 70.00 | 84.00 | 32.30 ~ 93.50 | 45.00 ~ 75.00 | 51.50 ~ 85.00 | 69.00 ~ 94.00 | 70.00 ~ 75.00 |
孔隙类型 | 粒间孔、微裂缝、有机质孔 | 矿物孔、晶间孔、 有机质孔 | 粒间孔、粒内孔、 有机质孔 | 粒间孔、粒内孔、 有机质孔 | 粒间孔、粒内孔、 有机质孔 | 粒间孔、 有机质孔 | 粒间孔、 有机质孔 | 粒内孔、 有机质孔 | 粒间孔、粒内孔、有机质孔 | 粒间孔、微裂缝、 有机质孔 | 粒间孔、微裂缝、 有机质孔 | 微裂缝、 有机质孔 |
孔隙度/% | 6.00 ~ 10.00 | 2.00 ~ 8.00 | 3.00 ~ 6.00 | 3.40 ~ 14.60 | — | 8.00 ~ 9.00 | 3.00 ~ 9.00 | 2.50 ~ 6.50 | 3.00 ~ 7.00 | 0.92 ~ 1.91 | 3.50 ~ 6.80 | 0.21 ~ 7.89 |
渗透率/ (10-3 μm2) | 5.000 ~ 50.000 | 0.000 1 ~ 1.970 | — | 0.040 ~ 13.000 | — | 0.005 ~ 8.000 | — | 1.000 ~ 5.000 | <0.100 | — | — | 0.002 ~ 4.610 |
含气饱和度/% | 55 ~ 80 | 20 ~ 60 | 75 | — | — | 65 ~ 75 | — | — | 40 ~ 70 | — | — | — |
含气量/(m3/t) | 1.70 ~ 2.83 | — | 8.50 ~ 9.91 | — | 1.70 ~ 6.20 | 2.83 ~ 9.34 | 5.60 ~ 8.50 | — | 1.70 ~ 8.40 | 0.80 ~ 4.26 | 0.50 ~ 16.16 | 0.93 ~ 2.21 |
吸附气含量/%或(m3/t) | 40 % ~ 60 % | 1.98~2.12 m3/t | 2.97 ~ 3.26 m3/t | 0.28 ~ 1.42 m3/t | 50 % ~ 70 % | 20 % ~ 26 % | 44 % | — | 40 % ~ 65 % | — | 20 % ~ 55 % | 25 % ~ 62 % |
地层压力/MPa | 2.80 ~ 28.00 | — | 20.86 ~ 27.58 | — | — | — | — | — | 30.00 ~ 110.00 | — | — | — |
地层温度/℃ | — | — | 65.50 ~ 177.00 | 78.00 ~ 180.00 | — | — | — | — | 40.00 ~ 140.00 | — | — | — |
压力系数 | 0.92~1.38 | 1.00 ~ 1.46 | 0.99 ~ 1.02 | 1.10 ~ 1.85 | 1.38 ~ 1.84 | 1.61 ~ 2.07 | 1.35 ~ 1.85 | 0.90 ~ 1.60 | 0.90 ~ 2.20 | — | 1.15 ~ 1.85 | 0.96 ~ 1.00 |
资源量/(1012m)3 | 42.48 | 9.04 ~ 22.15 | 1.53 ~ 5.72 | 3.44 | — | 20.30 | 17.00 | 23.22 | 18.48 | 3.50 | 6.00 | 1.00 |
储量丰度/ (108 m3/km2) | 1.73 | 0.37 ~ 0.90 | 1.17 ~ 4.40 | 1.14 | — | 8.70 | 5.97 | 9.55 | 3.74 | 3.50 | 2.00 | 0.41 |
Table 6
Statistics of key indicators of major shale gas sweet spots in the marine Wufeng-Longmaxi formations within the Sichuan Basin"
关键参数 | 气田位置 | |||||
---|---|---|---|---|---|---|
宁201井区 | 宁209井区 | 威202-204井区 | 威213井西区 | 自201井区 | 吉林自 301-302井区 | |
气田面积/km2 | 465.00 | 201.93 | 178.13 | 9.24 | 271.00 | 11.50 |
构造特征 | 单斜构造,地层倾角3° ~ 9° | 构造相对平缓 | 南东向单斜构造 | NW向单斜构造,地层倾角3° ~ 7° | 向东南倾斜的单斜构造 | “堑垒”相间较窄低陡背斜与宽缓向斜构造 |
断裂特征 | 中、小断裂为主,裂缝发育 | 中、小断层为主 | 零星小断层 | 不发育大尺度断层,局部小尺度断层 | 发育一些Ⅱ级和Ⅲ级小断裂 | 挤压形成的逆断层兼走滑性质 |
地层埋深/m | 1 500 ~ 4 500 | 2 000 ~ 4 000 | 1 500 ~ 4 000 | 3 200 ~ 3 800 | 2 000 ~ 4 500 | 2 000 ~ 4 000 |
地层厚度/m | 252.00 ~ 370.00 | — | — | 43.90 ~ 54.80,平均46.40 | — | — |
岩石类型 | 炭质页岩、硅质页岩、泥质粉砂岩、 粉砂质页岩 | 黑色炭质页岩、硅质页岩 | 黑色炭质页岩、 黑色页岩 | 黑色炭质、硅质页岩、粉砂质页岩 | 黑色钙质、硅质页岩 | 黑色炭质页岩、粉砂质页岩 |
储层厚度/m | 29.50 ~ 50.00 | 29.50 ~ 46.40 | 10.00 ~ 30.00 | 40.00 ~ 45.00 | 10.00 ~ 34.00 | 下层系15.00 ~ 27.50, 上层系22.50 ~ 40.00 |
TOC/% | 1.00 ~ 4.50 | 3.10 ~ 6.20 | 3.00 ~ 3.60 | 2.90 ~ 3.50 | 2.20 ~ 5.90 | 下层系3.00 ~ 4.40, 上层系2.20 ~ 2.90 |
Ro/% | 2.60 ~ 3.20 | 2.60 ~ 3.20 | 1.78 ~ 2.26 | 3.10 ~ 3.30 | 2.10 ~ 2.50 | 2.40 ~ 2.81,平均2.60 |
脆性指数/% | 42.50 ~ 82.30 | 61.00 ~ 86.00 | 43.10 ~ 75.00 | 65.00 ~ 70.00 | 58.00 ~ 88.00 | 下层系60.00 ~ 70.00, 上层系56.00 ~ 62.00 |
孔隙类型 | 有机孔、粒间孔、 晶间孔、晶内溶孔、裂缝 | 无机孔、无机缝、有机孔、 有机缝 | 有机孔,粒间、晶间、 晶内溶孔,裂缝 | 无机孔、有机孔、微裂缝 | 有机孔,粒间、晶间、 晶内溶孔,裂缝 | 无机孔、有机孔和裂缝 |
孔隙度/% | 2.00 ~ 10.90 | 4.20 ~ 7.30 | 2.30 ~ 7.00 | 5.30 ~ 6.00 | 5.10 ~ 6.80 | 下层系4.80 ~ 5.70,上层系4.80 ~ 5.90 |
渗透率/(10-3μm2) | 0.71 ~ 1.48 | — | 0.11 ~ 6.02 | — | 0.11 ~ 6.14 | 10.00 ~ 107.00 |
含气饱和度/% | 50.00 ~ 70.00 | 50.00 ~ 70.00 | 32.70 ~ 84.60 | 32.70 ~ 84.60 | 53.70~76.40 | 下层系56.00 ~ 74.00,上层系52.00~65.00 |
含气量/(m3/t) | 2.00 ~ 12.16 | 4.00 ~ 9.30 | 2.34 ~ 7.50 | 4.80 ~ 5.40 | 3.30 ~ 6.90 | 下层系5.00 ~ 7.00,上层系4.50 ~ 6.20 |
地层压力/MPa | 18.41 ~ 61.02 | 31.57 ~ 49.88 | 35.13 ~ 73.31 | 13.79 ~ 73.32 | 13.79 ~ 73.31 | 70.00 |
地层温度/℃ | 75.00 ~ 110.60 | — | 99.90 ~ 133.90 | 99.90 ~ 133.100 | 71.8 ~ 133.92 | 125.00 |
压力系数 | 1.20 ~ 2.03 | 1.20 ~ 2.00 | >1.20 | 1.80~2.00 | >1.20 | 2.10 ~ 2.20 |
储量丰度/(108 m3/km2) | 5.24 ~ 7.52 | 5.14 | 3.68 ~ 6.29 | 6.05 | 3.47 | 3.93 |
关键参数 | 气田位置 | |||||
泸州区块泸203井区 | 泸州福集向斜区 | 渝西足201-202井区 | 黄金坝YS108H井区 | 紫金坝YS112井区 | 太阳-大寨-海坝区块 | |
气田面积/km2 | 165.00 | 158.20 | 363.10 | 154.00 | 85.00 | 490.90 |
构造特征 | “堑垒”低陡背斜 | 福集向斜 | 背斜与向斜, 构造简单 | 压扭构造背景, 地层倾角较平缓 | 构造形态简单, 构造作用相对较弱 | 复背斜构造, 三隆两凹构造格局 |
断裂特征 | 发育Ⅰ级、Ⅱ级、三四级断裂 | Ⅱ级及以下级别断层,逆断层 | 少量Ⅲ级、Ⅳ级小逆断层 | 大断层不发育 | 局部断裂发育 | 发育逆断层和走滑断层 |
地层埋深/m | 3 550 ~ 4 000 | 3 500 ~ 4 200 | 3 500 ~ 4 500 | 2 000 ~ 3 500 | 1 000 ~ 3 000 | 250 ~ 2 200 |
地层厚度/m | 500 ~ 600 | 450 ~ 650 | 370 ~ 480 | — | — | 200 ~ 253.5 |
岩石类型 | 下层系硅质炭质页岩;上层系钙质页岩 | 下层系硅质炭质页岩;上层系钙质页岩 | 黑色硅质页岩、粉砂质页岩 | 炭质硅质页岩、粉砂质页岩 | 钙质页岩 | 炭质、硅质页岩、粉砂质页岩 |
储层厚度/m | 30.00 ~ 65.00 | 35.00 ~ 65.00 | 20.00 ~ 39.00 | 36.30 | 33.00 ~ 35.00 | 30.00 ~ 50.00 |
TOC/% | 2.80 ~ 5.70 | 3.00 ~ 3.60 | 1.90 ~ 4.60 | 2.00 ~ 6.70 | 3.03 | 1.02 ~ 6.06 |
Ro/% | 2.50~3.40 | 2.50~3.40 | >2.00 | 2.20 ~ 3.20 | 2.30 ~ 2.60 | 1.80 ~ 3.08 |
脆性指数/% | 60 ~ 77 | 65 ~ 73 | 70 ~ 78 | 55 ~ 75 | 55 | 51 ~ 79 |
孔隙类型 | 有机孔、无机孔发育 | 有机孔、无机孔和裂缝 | 无机孔、有机孔和裂缝 | 有机质孔、无机孔 | 有机质孔、粒间微孔、铸模孔 | 有机质孔、无机孔、微裂缝 |
孔隙度/% | 4.30 ~ 6.90 | 4.00 ~ 5.55 | 2.80 ~ 5.50 | 3.10 ~ 6.30 | 4.50 | 2.78 ~ 7.89 |
渗透率/(10-3 μm2) | 4.07 ~ 9.81 | 4.07 ~ 9.81 | — | — | — | — |
含气饱和度/% | 60 ~ 76 | 55 ~ 70 | 62 ~ 67 | — | — | 39 ~ 74 |
含气量/(m3/t) | 3.60 ~ 8.70 | 4.50 ~ 6.50 | 3.30 ~ 6.70 | 2.56 ~ 3.48 | 3.65 | 1.31 ~ 6.99 |
地层压力/MPa | 97.50 | 69.10 ~ 96.51 | 77.00 ~ 91.00 | — | — | 2.90 ~ 41.90 |
地层温度/℃ | 133 ~ 143 | 120 ~ 140 | 110 ~ 125 | 95 | 95 | — |
压力系数 | 1.94 ~ 2.42 | 2.07 ~ 2.25 | 1.85 ~ 2.07 | 2.00 | 1.60 ~ 1.80 | 1.25 ~ 1.62 |
储量丰度/(108 m3/km2) | 8.16 ~ 9.50 | 8.60 ~ 11.26 | 4.42 ~ 5.09 | 4.20 | 3.27 | 3.11 ~ 6.00 |
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