松辽盆地中央凹陷区1000 m以深青山口组油页岩品质特征分析——以吉宁地1井为例

Analysis of quality characteristics of oil shale in the Qingshankou Formation in the central depression area of the Songliao Basin at 1000 meters and deeper:Taking Jiningdi Well 1 as an example

吉宁地1井位于松辽盆地中央凹陷扶新隆起带,通过钻探取样、岩心测试分析得出,青山口组共发育4层油页岩矿层,埋深范围1299.90~1424.00 m,矿体最大厚度2.2 m,最小厚度1.0 m,累计厚度5.6 m,最低含油率3.5%,最高含油率5.2%,平均含油率4.16%,属于低等品质油页岩;有机碳质量分数在3.33%~7.86%之间,平均值为5.44%;H/C(原子比)介于1.38~1.76之间,平均为1.57,O/C(原子比)介于0.10~0.14之间,平均为0.12。有机质类型以I型为主,岩石热解峰温T max范围440~448℃,平均值为446℃,烃源岩达到成熟阶段,岩石热解生烃潜量(S 1+S 2)范围34.15~61.72 mg/g,属于好-中等烃源岩类型;发热量范围2574.87~3952.93(kJ/kg),平均值为3134.0 kJ/kg;全硫质量分数范围为0.64%~2.14%,平均为1.23%,属于特低硫-中硫油页岩;灰分产率介于84.61%~88.21%,平均值为86.84%,属于高灰分油页岩。

Jiningdi Well 1 is located in the Fuxin uplift zone in the central depression of the Songliao Basin.Through drilling sampling and core test analysis,it is concluded that there are 4 layers of oil shale deposits in the Qingshankou Formation,with the buried depth range from 1299.90 m to 1424.00 m.The Maximum thickness of ore body is 2.2 m,the minimum thickness is 1.0 m,the cumulative thickness is 5.6 m,the lowest oil content is 3.5%,the highest oil content is 5.2%,and the average oil content is 4.16%.It belongs to low-quality oil shale;the organic carbon content is between 3.33% and 7.86%.The average value is 5.44%;the H/C(atomic ratio)is between 1.38~1.76,the average is 1.57,the O/C(atomic ratio)is between 0.10~0.14,the average is 0.12,and the organic matter type is I type.The peak temperature of rock pyrolysis T max ranges from 440℃ to 448℃,with an average value of 446℃.The source rock has reached the mature stage,and the hydrocarbon generation potential of rock pyrolysis(S 1+S 2)range 34.15~61.72 mg/g.It belongs to the good-medium source rock type;the calorific value range 2574.87~3952.93(kJ/kg),with an average value 3134.0 kJ/kg;the total sulfur content range 0.64%~2.14%,with an average of 1.23%,which belongs to extra-low sulfur-medium-sulfur oil shale;ash yield is between 84.61%and 88.21%,with an average 86.84%,which belongs to high ash oil shale.