Oil & Gas Geology ›› 2023, Vol. 44 ›› Issue (4): 946-961.doi: 10.11743/ogg20230412
• Petroleum Geology • Previous Articles Next Articles
Senlin YIN1(), Xu CHEN2, Yi YANG3, Tong ZHANG4, Huanghui CHENG4, Tao JIANG4, Ting XIONG5, Juanxia LIU3, Lipeng HE5, Xiaojiang YANG5
Received:
2023-02-02
Revised:
2023-05-20
Online:
2023-08-01
Published:
2023-08-09
CLC Number:
Senlin YIN, Xu CHEN, Yi YANG, Tong ZHANG, Huanghui CHENG, Tao JIANG, Ting XIONG, Juanxia LIU, Lipeng HE, Xiaojiang YANG. Origin and sweet spots of typical low-resistivity oil reservoirs of fine-grained sedimentary rocks[J]. Oil & Gas Geology, 2023, 44(4): 946-961.
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Table 1
Genetic types of low-resistivity oil reservoirs and the main controlling factors"
大类 | 亚类 | 细类 | 小类 | 控制因素 |
---|---|---|---|---|
地质成因 | 沉积成因 | 岩石组构 | 岩性粒度细 | 极细砂岩、粉砂级颗粒 |
黏土矿物含量 | 蒙脱石、伊利石含量高 | |||
骨架含导电矿物 | 黄铁矿、黄铜矿、火山岩碎屑 | |||
孔隙结构 | 特高孔隙度 | 分选好的疏松砂岩 | ||
微孔隙结构 | 束缚水含量高 | |||
岩层结构 | 岩性叠置组合 | 砂、泥薄互层 | ||
原生水性质 | 地层水矿化度 | 高或低矿化度水 | ||
构造成因 | 构造起伏 | 局部构造幅度 | 低幅度构造 | |
水动力成因 | 地层水 | 古油藏被地层水冲刷而破坏 | 淡水冲刷 | |
含油气性 | 流体性质 | 油气类型 | 轻质油气 | |
工程因素 | 泥浆侵入 | — | — | 盐水泥浆侵入较深 |
Table 2
Classification and characteristics of typical low-resistivity oil reservoirs within fine-grained sedimentary rocks"
油层类型 | 储层岩性 | 层位 | 电阻率值/(Ω·m) | 孔隙度/% | 含油 饱和度/% | 孔隙结构特征 | 沉积微相 |
---|---|---|---|---|---|---|---|
致密低阻型 | 粉砂岩、泥质粉砂岩、 粉砂质泥岩 | 三叠系 黄山街组 | 3.0 ~ 6.0 | 8 ~ 14 | 55 ~ 85 | 基质型单模态 | 浅湖滩坝 |
导电矿物低阻型 | 白云质粉砂岩、白云质泥岩 | 二叠系 平地泉组 | 2.0 ~ 100.0 | 6 ~ 15 | 65 ~ 95 | 基质型、溶蚀型、 裂缝型多模态 | 浅湖滩坝、 半深湖-深湖 |
强连通水网低阻型 | 极细砂岩、粉砂岩、泥质粉砂岩、粉砂质泥岩 | 新近系韩江组和珠江组 | 1.6 ~ 4.0 | 10 ~ 25 | 55 ~ 80 | 基质型双模态 | 三角洲外前缘远砂坝、席状砂 |
Table 3
Low-resistivity characteristics of fine-grained sedimentary rocks in major basins of China (modified from references [1-3, 8-9])"
盆地 | 凹陷 | 地层 | 典型井 | 岩性类型 | 微相类型 | 电阻率/ (Ω·m) | 甜点电阻率/ (Ω·m) | 低阻 类型 |
---|---|---|---|---|---|---|---|---|
渤海湾盆地 | 东营凹陷 | 始新统沙三下亚段、 沙四上亚段 | 牛页1井 | 灰质泥岩、灰质页岩 | 浅湖-半深湖 | 90 ~ 110 | 100 | 相对 低阻 |
沾化凹陷 | 始新统沙三下亚段 | 罗69井 | 灰质泥岩、泥灰岩、 藻灰岩、重结晶灰岩 | 咸水湖泊 | 30 ~ 240 | 30或90 | 相对 低阻 | |
束鹿凹陷 | 始新统沙三下亚段 | ST1H井 | 灰质泥岩、粉砂岩 | 咸水湖泊 | 10 ~ 200 | 20 ~ 100 | 相对 低阻 | |
沧东凹陷 | 始新统孔二段 | 官东14井 | 长英质页岩、混合质页岩、 白云质页岩 | 半深湖-深湖 | 3 ~ 10 | 5 ~ 8 | 绝对 低阻 | |
松辽盆地 | 古龙凹陷 | 上白垩统青山口组 | 古页8HC井 | 泥页岩,夹含薄层砂岩 | 深湖 | 6 ~ 18 | 8 ~ 10 | 绝对 低阻 |
鄂尔多斯盆地 | — | 上三叠统延长组7段 | Ch89井 | 页岩、泥岩,夹粉-细砂岩、 凝灰岩 | 半深湖-深湖 | 10 ~ 100 | 10 ~ 40 | 相对 低阻 |
南襄盆地 | 泌阳凹陷 | 渐新统核桃园组三段 | HF1井 | 页岩、泥质粉砂岩、灰质页岩、白云质页岩、泥质云岩 | 半深湖-深湖 | 50 ~5 000 | 50 ~ 500 | 相对 低阻 |
滦平盆地 | — | 下白垩统西瓜园组 | 滦探1井 | 泥页岩、白云岩、碳酸盐岩混合细粒岩、长英质混合细粒岩 | 半深湖-深湖 | 50 ~ 1 000 | 150 | 相对 低阻 |
江汉盆地 | 潜江凹陷 | 始新统潜江组三段 | W99井 | 泥岩、膏质泥岩、盐岩, 夹含粉砂岩 | 咸水湖泊 | 0.8 ~ 2 000 | 1.8 ~ 6 | 相对 低阻 |
准噶尔盆地 | 玛湖凹陷 | 中二叠统风城组 | 风南1井 | 白云质泥岩、白云质粉砂岩、 泥质白云岩、泥质粉砂岩 | 咸水湖泊 | 10 ~ 1 000 | 100 ~ 200 | 相对 低阻 |
吉木萨尔凹陷 | 中二叠统芦草沟组 | J10024井 | 白云质泥岩、白云质粉砂岩、 泥质白云岩、泥质粉砂岩 | 咸水湖泊 | 2 ~ 2 000 | 2 ~ 10 | 相对 低阻 | |
沙账凸起 | 中二叠统平地泉组 | HD2947井 | 白云质泥岩、白云质粉砂岩、 泥质白云岩、泥质粉砂岩 | 咸水湖泊 | 1 ~ 1 000 | 1 ~ 8 | 相对 低阻 | |
阜康凹陷 | 中三叠统黄山街组 | 台60井 | 泥质粉砂岩、粉砂质泥岩、 粉砂岩 | 浅湖-半深湖、浅湖沙坝 | 3 ~ 15 | 4 ~ 7 | 绝对 低阻 | |
珠江口盆地 | 阳江凹陷 | 新近系韩江组、 珠江组 | A1井 | 极细砂岩、粉砂岩、泥质 粉砂岩、粉砂质泥岩 | 三角洲外前缘 | 0.8 ~ 6 | 1 ~ 3 | 绝对 低阻 |
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