Taking the Lower Permian Fengcheng Formation shale in Mahu Sag of Junggar Basin,NW China,as an example,core observation,test analysis,geological analysis and numerical simulation were applied to identify the shale oil...Taking the Lower Permian Fengcheng Formation shale in Mahu Sag of Junggar Basin,NW China,as an example,core observation,test analysis,geological analysis and numerical simulation were applied to identify the shale oil micro-migration phenomenon.The hydrocarbon micro-migration in shale oil was quantitatively evaluated and verified by a self-created hydrocarbon expulsion potential method,and the petroleum geological significance of shale oil micro-migration evaluation was determined.Results show that significant micro-migration can be recognized between the organic-rich lamina and organic-poor lamina.The organic-rich lamina has strong hydrocarbon generation ability.The heavy components of hydrocarbon preferentially retained by kerogen swelling or adsorption,while the light components of hydrocarbon were migrated and accumulated to the interbedded felsic or carbonate organic-poor laminae as free oil.About 69% of the Fengcheng Formation shale samples in Well MY1 exhibit hydrocarbon charging phenomenon,while 31% of those exhibit hydrocarbon expulsion phenomenon.The reliability of the micro-migration evaluation results was verified by combining the group components based on the geochromatography effect,two-dimension nuclear magnetic resonance analysis,and the geochemical behavior of inorganic manganese elements in the process of hydrocarbon migration.Micro-migration is a bridge connecting the hydrocarbon accumulation elements in shale formations,which reflects the whole process of shale oil generation,expulsion and accumulation,and controls the content and composition of shale oil.The identification and evaluation of shale oil micro-migration will provide new perspectives for dynamically differential enrichment mechanism of shale oil and establishing a“multi-peak model in oil generation”of shale.展开更多
目的:总结外侧半月板前角-前体部损伤的临床分型及相应手术策略并评估治疗效果。方法:回顾性分析2020年1月至2020年12月收治的87例外侧半月板前角-前体部损伤患者病例资料,总结撕裂类型和手术策略,根据术前和末次随访的国际膝关节评分...目的:总结外侧半月板前角-前体部损伤的临床分型及相应手术策略并评估治疗效果。方法:回顾性分析2020年1月至2020年12月收治的87例外侧半月板前角-前体部损伤患者病例资料,总结撕裂类型和手术策略,根据术前和末次随访的国际膝关节评分委员会(IKDC)评分和Lysholm膝关节评分评估治疗效果。结果:前角-前体部损伤占所有外侧半月板损伤的10.8%。依据撕裂类型将外侧半月板前角-前体部损伤分为5型,其中Ⅰ型为复合撕裂,表现为水平撕裂合并某一层垂直撕裂,并根据垂直撕裂的部位分为Ⅰa、Ⅰb、Ⅰc三种亚型;Ⅱ型为水平撕裂;Ⅲ型为垂直撕裂,并根据移位情况和形态分为Ⅲa、Ⅲb、Ⅲc三种亚型;Ⅳ型为松散型,发生在前角;Ⅴ型为缺失型,半月板前角-前体部消磨殆尽。对于常规手术入路无法处理的Ⅰb型和Ⅱ型损伤,附加外下入路进行操作并视情况进行Outside-in缝合。87例患者均获得随访,平均随访25.1±5.7月(19~31月)。末次随访时IKDC评分和Lysholm评分均显著高于术前(分别为64.5±7.4 vs 84.3±6.9和73.3±5.1 vs 90.1±5.0,均P<0.05)。结论:基于不同分型采取相应手术策略是治疗外侧半月板前角-前体部损伤的有效方法。展开更多
目的:探究多间室和内侧单间室严重骨关节炎(OA)患者内侧半月板突出(MME)及内侧半月板后根撕裂(MMPRT)的特点。方法:回顾性分析2020年6月至2021年11月我科收治的117例终末期OA患者的基线资料、X线和磁共振(MRI)图像,其中多间室严重OA患...目的:探究多间室和内侧单间室严重骨关节炎(OA)患者内侧半月板突出(MME)及内侧半月板后根撕裂(MMPRT)的特点。方法:回顾性分析2020年6月至2021年11月我科收治的117例终末期OA患者的基线资料、X线和磁共振(MRI)图像,其中多间室严重OA患者60例67膝(M-OA组),均行全膝关节置换;内侧单间室严重OA患者57例68膝(mU-OA组),均行内侧单髁置换。在MRI上测量患膝MME程度,判定是否存在MMPRT,并在X线片上测量髋膝踝角(HKA)、胫骨近端内侧角(MPTA)、机械轴股骨远端外侧角(mLDFA)、胫股关节线夹角(JLCA),在MRI上测量内侧胫骨平台后倾角(mPTS)。对基线资料、病理性MME和MMPRT发生率、MME程度、HKA、MPTA、mLDFA、JLCA和m PTS进行统计学分析。结果:两组患者年龄、体质指数(BMI)和患膝侧别等无显著性差异(P>0.05),M-OA组患者女性比例高于mU-OA组(78.33%vs 56.14%,P<0.05)。M-OA组病理性MME发生率高于m U-OA组(79.1%vs52.94%,P<0.01),且MME程度显著大于mU-OA组(4.72±1.88 mm vs 3.24±1.25 mm,P<0.01)。MOA组HKA和JLCA显著大于mU-OA组(分别为10.7°±4.5°vs 7.5°±2.3°,P<0.01;-4.3°±1.8°vs-2.1°±0.9°,P<0.05)。两组间MMPRT发生率、MPTA、mLDFA和m PTS无差异(P>0.05)。结论:多间室严重骨关节炎患者的内侧半月板突出程度和病理性内侧半月板突出发生率较高,女性比例高、髋膝踝角和胫股关节线夹角的角度大可能是其原因。展开更多
基金Supported by the National Natural Science Foundation(42202133,42072174,42130803,41872148)PetroChina Science and Technology Innovation Fund(2023DQ02-0106)PetroChina Basic Technology Project(2021DJ0101).
文摘Taking the Lower Permian Fengcheng Formation shale in Mahu Sag of Junggar Basin,NW China,as an example,core observation,test analysis,geological analysis and numerical simulation were applied to identify the shale oil micro-migration phenomenon.The hydrocarbon micro-migration in shale oil was quantitatively evaluated and verified by a self-created hydrocarbon expulsion potential method,and the petroleum geological significance of shale oil micro-migration evaluation was determined.Results show that significant micro-migration can be recognized between the organic-rich lamina and organic-poor lamina.The organic-rich lamina has strong hydrocarbon generation ability.The heavy components of hydrocarbon preferentially retained by kerogen swelling or adsorption,while the light components of hydrocarbon were migrated and accumulated to the interbedded felsic or carbonate organic-poor laminae as free oil.About 69% of the Fengcheng Formation shale samples in Well MY1 exhibit hydrocarbon charging phenomenon,while 31% of those exhibit hydrocarbon expulsion phenomenon.The reliability of the micro-migration evaluation results was verified by combining the group components based on the geochromatography effect,two-dimension nuclear magnetic resonance analysis,and the geochemical behavior of inorganic manganese elements in the process of hydrocarbon migration.Micro-migration is a bridge connecting the hydrocarbon accumulation elements in shale formations,which reflects the whole process of shale oil generation,expulsion and accumulation,and controls the content and composition of shale oil.The identification and evaluation of shale oil micro-migration will provide new perspectives for dynamically differential enrichment mechanism of shale oil and establishing a“multi-peak model in oil generation”of shale.
文摘目的:总结外侧半月板前角-前体部损伤的临床分型及相应手术策略并评估治疗效果。方法:回顾性分析2020年1月至2020年12月收治的87例外侧半月板前角-前体部损伤患者病例资料,总结撕裂类型和手术策略,根据术前和末次随访的国际膝关节评分委员会(IKDC)评分和Lysholm膝关节评分评估治疗效果。结果:前角-前体部损伤占所有外侧半月板损伤的10.8%。依据撕裂类型将外侧半月板前角-前体部损伤分为5型,其中Ⅰ型为复合撕裂,表现为水平撕裂合并某一层垂直撕裂,并根据垂直撕裂的部位分为Ⅰa、Ⅰb、Ⅰc三种亚型;Ⅱ型为水平撕裂;Ⅲ型为垂直撕裂,并根据移位情况和形态分为Ⅲa、Ⅲb、Ⅲc三种亚型;Ⅳ型为松散型,发生在前角;Ⅴ型为缺失型,半月板前角-前体部消磨殆尽。对于常规手术入路无法处理的Ⅰb型和Ⅱ型损伤,附加外下入路进行操作并视情况进行Outside-in缝合。87例患者均获得随访,平均随访25.1±5.7月(19~31月)。末次随访时IKDC评分和Lysholm评分均显著高于术前(分别为64.5±7.4 vs 84.3±6.9和73.3±5.1 vs 90.1±5.0,均P<0.05)。结论:基于不同分型采取相应手术策略是治疗外侧半月板前角-前体部损伤的有效方法。
文摘目的:探究多间室和内侧单间室严重骨关节炎(OA)患者内侧半月板突出(MME)及内侧半月板后根撕裂(MMPRT)的特点。方法:回顾性分析2020年6月至2021年11月我科收治的117例终末期OA患者的基线资料、X线和磁共振(MRI)图像,其中多间室严重OA患者60例67膝(M-OA组),均行全膝关节置换;内侧单间室严重OA患者57例68膝(mU-OA组),均行内侧单髁置换。在MRI上测量患膝MME程度,判定是否存在MMPRT,并在X线片上测量髋膝踝角(HKA)、胫骨近端内侧角(MPTA)、机械轴股骨远端外侧角(mLDFA)、胫股关节线夹角(JLCA),在MRI上测量内侧胫骨平台后倾角(mPTS)。对基线资料、病理性MME和MMPRT发生率、MME程度、HKA、MPTA、mLDFA、JLCA和m PTS进行统计学分析。结果:两组患者年龄、体质指数(BMI)和患膝侧别等无显著性差异(P>0.05),M-OA组患者女性比例高于mU-OA组(78.33%vs 56.14%,P<0.05)。M-OA组病理性MME发生率高于m U-OA组(79.1%vs52.94%,P<0.01),且MME程度显著大于mU-OA组(4.72±1.88 mm vs 3.24±1.25 mm,P<0.01)。MOA组HKA和JLCA显著大于mU-OA组(分别为10.7°±4.5°vs 7.5°±2.3°,P<0.01;-4.3°±1.8°vs-2.1°±0.9°,P<0.05)。两组间MMPRT发生率、MPTA、mLDFA和m PTS无差异(P>0.05)。结论:多间室严重骨关节炎患者的内侧半月板突出程度和病理性内侧半月板突出发生率较高,女性比例高、髋膝踝角和胫股关节线夹角的角度大可能是其原因。
