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RFT测井资料估算渗透率方法的分析
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作者 师和伟 刘锋 《国外测井技术》 2003年第1期25-27,29,共4页
文章详细分析了用RFT测井资料估算地层渗透率的各种方法,按压降法和压力恢复分析法给出了五个不同的计算公式并探讨了它们之间的相互关系,提出了用压力与恢复时间函数关系图来识别地层中压力传播模式的可能性并用实例给予了验证。
关键词 RFT 测井资料 估算 渗透率方法 压降周期 压力恢复周期 球形流动 圆柱形流动 油气层
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非均质油藏的岩石渗透率合成方法研究 被引量:14
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作者 赵军 惠延安 +1 位作者 王平 郑新华 《石油学报》 EI CAS CSCD 北大核心 2007年第2期102-104,共3页
渗透率合成方法经常应用在石油储量计算、油田开发方案编制和油藏数值模拟等油藏工程研究中,主要包括垂向上不同层段渗透率的合成以及沿渗流方向不同渗透率带渗透率的合成。根据达西定律及建立的渗流模型,经过数学推导,得到垂向和水平... 渗透率合成方法经常应用在石油储量计算、油田开发方案编制和油藏数值模拟等油藏工程研究中,主要包括垂向上不同层段渗透率的合成以及沿渗流方向不同渗透率带渗透率的合成。根据达西定律及建立的渗流模型,经过数学推导,得到垂向和水平方向两类渗流模型的渗透率合成公式。其中,垂向上不同层段渗透率的合成按流量叠加原理进行推导,而沿渗流方向不同渗透率带的合成则按不同渗透率带的压差叠加原理进行合成。结合石油地质、开发研究工作的具体情况,用室内实验实测数据进行了验证,计算结果的误差为0.28%-5.35%,基本上在允许的范围之内。 展开更多
关键词 非均质油藏 渗透 油藏工程 渗透合成方法 渗流模型
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岩心渗透率的精确计算方法及其适用范围实验研究 被引量:2
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作者 李奇 高树生 +2 位作者 刘华勋 叶礼友 盖兆贺 《西安石油大学学报(自然科学版)》 CAS 北大核心 2015年第2期69-74 10,10,共7页
通过对非达西二项式渗流方程推导,建立了计算高速非达西渗透率的方法,并结合400块岩心的气体单相渗流实验结果,明确了不同渗透率计算方法的适用范围:储层渗透率小于10×10-3μm2时,滑脱效应对气体渗流产生了较大影响,应进行克氏渗... 通过对非达西二项式渗流方程推导,建立了计算高速非达西渗透率的方法,并结合400块岩心的气体单相渗流实验结果,明确了不同渗透率计算方法的适用范围:储层渗透率小于10×10-3μm2时,滑脱效应对气体渗流产生了较大影响,应进行克氏渗透率校正计算;大于50×10-3μm2时,高速非达西渗流对气体渗流产生了较大影响,达西定律不再适用,应采用高速非达西渗透率的计算方法;介于(10~50)×10-3μm2时,需要同时考虑两种渗流规律的影响而采用复合计算方法。经与岩心分析资料对比,用此计算方法得到的渗透率值更加接近实际地层情况。 展开更多
关键词 渗透计算方法 高速非达西渗流 适用范围 滑脱效应
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基于三维地应力的渗透率转换方法 被引量:4
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作者 朱苏阳 李传亮 董凤玲 《油气地质与采收率》 CAS CSCD 北大核心 2013年第4期69-71,115-116,共3页
储层渗透率的测量及其储层条件下的转化方式是油藏工程研究的重要内容。随着储层岩石有效应力的增加,储层岩石孔隙半径减小,渗透率降低,地面测量的岩石渗透率比地层条件下的渗透率高。为将地面测量的渗透率应用于油藏工程,须将其换算到... 储层渗透率的测量及其储层条件下的转化方式是油藏工程研究的重要内容。随着储层岩石有效应力的增加,储层岩石孔隙半径减小,渗透率降低,地面测量的岩石渗透率比地层条件下的渗透率高。为将地面测量的渗透率应用于油藏工程,须将其换算到储层条件。根据岩石在地面和地层条件下的应力状态,研究了地面—地下渗透率的转换方法,该方法采用三维地应力,克服了仅采用上覆地层压力的不足。胜利油区渗透率覆压实验校正结果表明,仅采用上覆地层压力计算的渗透率转换值,比采用三维地应力计算的渗透率转换值明显偏小。对于中渗透地层,三维地应力的渗透率转换方法与原方法差别不大,对于低渗透地层,基于三维地应力的渗透率转换方法的计算值比原方法增大约10%。 展开更多
关键词 上覆地层压力 三维地应力 储层条件 渗透转换方法胜利油区
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Experimental Study of Preferential Solute Transportation During Dump Leaching 被引量:2
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作者 YIN Sheng-hua WU Ai-xiang 《Journal of China University of Mining and Technology》 EI 2006年第4期416-420,共5页
The production of dump leaching of the Dexing Copper Mine was affected by a preferential solution flow. Formative mechanism of the preferential solution flow was investigated by analyzing the relationship between both... The production of dump leaching of the Dexing Copper Mine was affected by a preferential solution flow. Formative mechanism of the preferential solution flow was investigated by analyzing the relationship between both dump permeability and surface tension and ore diameter. The preferential solution flow occured in the fine ore area when the application rate was low. The preferential solution flow entered into the coarse ore area because the negative pore water pressure disappeared with an increase of the application rate. The preferential solute transportation experiment was conducted by selecting NaCl as mineral. Results of the experiment showed that the concentration of the outflow solution reduced over time. The concentration of the coarse ore area outflow solution was greater than that of the fine ore area. The process of NaCl leaching can be divided into two stages. NaCl was carried out directly by diffusion--convection during the first stage, so the leaching rate increased sharply. But in the second stage, only a small amount of NaCl dissolved in the immobile water. The leaching rate increased slowly because NaC1, dissolved in the immobile water, can only be leached by diffusion. 展开更多
关键词 dump leaching preferential solution flow SOLUTE preferential transportation application rate leaching rate
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Methane adsorption-induced coal swelling measured with an optical method 被引量:3
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作者 Tang Shuheng Wan Yi +2 位作者 Duan Lijiang Xia Zhaohui Zhang Songhang 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第6期949-953,共5页
In order to quantify the effect of matrix shrinkage on reservoir permeability during coalbed methane production, coal samples from Huozhou, Changzhi and Jincheng areas in Shanxi province (classified as high-volatile ... In order to quantify the effect of matrix shrinkage on reservoir permeability during coalbed methane production, coal samples from Huozhou, Changzhi and Jincheng areas in Shanxi province (classified as high-volatile bituminous coal, low-volatile bituminous coal and anthracite, respectively) were collected, and adsorption-induced coal swelling in methane were determined by an optical method at 40 ℃ and pressure up to 12 MPa. All three coals showed similar behavior-that swelling increased as a function of pressure up to about 10 MPa but thereafter no further increase in swelling was observed. Swelling in the direction perpendicular to the bedding plane is greater than that parallel to the bedding plane, and the differences are about 7.77-8.33%. The maximum volumetric swelling ranges from 2.73% to 3.21 %-increasing with increasing coal rank. The swelling data can be described by a modified DR model. In addition, swelling increases with the amount of adsorption. However, the increase shows a relatively slower stage followed by a relatively faster stage instead of a linear increase. Based on the assumption that sorption-induced swelling/shrinkage of coal in methane is reversible, the permeability increases induced by coal shrinkage during methane desorption was analyzed, and the results indicate that the permeability change is larger for higher rank coal in the same unit of pressure depletion. 展开更多
关键词 CoalAdsorptionMethaneSwellingPermeability
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