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吉木萨尔凹陷芦草沟组致密油储层岩石微观孔隙结构表征 被引量:33
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作者 田伟 刘慧卿 +2 位作者 何顺利 王敬 谢灵 《油气地质与采收率》 CAS CSCD 北大核心 2019年第4期24-32,共9页
综合利用高压压汞、恒速压汞和扫描电镜技术对吉木萨尔凹陷芦草沟组致密油储层岩石的微观孔隙结构进行研究。恒速压汞技术可以定量地区分样品的孔道和喉道,对大孔孔径测定准确,但是受限于较低的进汞压力,无法探测到较小的孔径。高压压... 综合利用高压压汞、恒速压汞和扫描电镜技术对吉木萨尔凹陷芦草沟组致密油储层岩石的微观孔隙结构进行研究。恒速压汞技术可以定量地区分样品的孔道和喉道,对大孔孔径测定准确,但是受限于较低的进汞压力,无法探测到较小的孔径。高压压汞技术因其较高的进汞压力可以准确地测定样品小孔隙的孔径。在共同的可测量区间内,通过插值计算方法求得两种测定技术的结合点,利用联合高压压汞与恒速压汞技术的方法计算获得了储层岩样的全尺度孔径分布曲线。结果表明:吉木萨尔凹陷芦草沟组致密油储层岩石样品的孔隙类型主要为粒间孔隙、残余孔隙及晶间微孔隙。样品的毛管压力曲线均不存在中间平缓段,孔隙结构复杂,分选性较差。计算得到的吉木萨尔凹陷芦草沟组致密油储层岩石孔径分布呈双峰态。根据LOUCKS等提出的孔分类法,样品孔径为0.07~1μm的纳米孔非常发育,中孔孔径为120~150μm,微孔不发育。高压压汞技术与恒速压汞技术具有物理模型一致性,两者的结合是一种准确求取致密砂岩储层岩石全尺度孔径分布的有效方法。 展开更多
关键词 致密油 微观孔隙结构 高压压汞技术 恒速压汞技术 全尺度孔径分布 吉木萨尔凹陷
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Determinants on Rural-Urban Labor Migration in China:Empirical Analysis on the Effect of Rural Cooperate Medical Insurance based on Cross-Sectional and Longitudinal Data
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作者 Jiang Yong Hart Xiangyang +2 位作者 Wang Shumei Jiang Huayun Wang Shanshan 《Chinese Journal of Population,Resources and Environment》 2012年第3期18-29,共12页
This paper studies factors influencing rural-urban labor migration in China,particularly the implementation of rural cooperative medical insurance(RCMI) in the year 2003.With the support of data analysis from the year... This paper studies factors influencing rural-urban labor migration in China,particularly the implementation of rural cooperative medical insurance(RCMI) in the year 2003.With the support of data analysis from the year 2000,2004 and 2006,clear linear correlations are found between gender,income,health condition and rural-urban labor flow,whereas the impact of education and employment status are more complicated.More importantly,results from regression show that the establishment of RCMI in countryside of China not only inhibits rural residents from seeking employment outside the village,but also pulls back rural people who have already worked in cities.When regional dimension is concerned,the pure composite effect of RCMI on rural labor flow is less significant in coastal areas with better economic performance and medical service. 展开更多
关键词 rural labor outflow rural labor return rcmi binaryvariable linear regression regional effect
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