| 致密砂岩储层近井区启动压力梯度的存在原因探讨 |
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| 引用本文： | 田冷,何顺利.致密砂岩储层近井区启动压力梯度的存在原因探讨[J].科技导报(北京),2009,27(1). |
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| 作者姓名： | 田冷 何顺利 |
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| 作者单位： | 田冷,TIAN Leng(中国石油大学石油工程教育部重点实验室,北京,102249;中国石油大学气体能源开发技术教育部工程研究中心,北京,102249);何顺利,HE Shunli(中国石油大学气体能源开发技术教育部工程研究中心,北京,102249;中国石油大学(北京)石油天然气工程学院,北京,102249)
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| 摘 要： | 研究了低渗透油气藏近井区启动压力梯度的存在原因.以安塞油田王窑区致密砂岩储层为例1,在对岩心进行渗透率与有效压力实验的基础上,研究了渗透率对有效压力的敏感性、渗透率的大小与有效压力的敏感性关系.研究表明,存在层理缝或微裂缝时,渗透率在低有效压力下变化特别明显.岩心在净围压的重复变化过程中均具有一定的塑性;在低渗透油气藏近井区储集层的岩石形变在矿场上明显存在,这可能是导致近井区启动压力梯度的主要原因,某些开采特征与流动现象可用近井区岩石形变来解释.通过致密储层压力敏感性机理分析,建立了具有启动压力梯度特征的渗流理论模型.
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| 关 键 词： | 致密油气藏 近井地带 启动压力梯度 渗流实验 |
Influencing Factors for Threshold Pressure Gradient near the Wellbore on Tight Sand Stones Reservoirs |
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| TIAN Leng,HE Shunli,.Education Ministry Key Laboratory of Petroleum Engineering,China University of Petroleum,Beijing ,China .Education Ministry Engineering Research Center of Gas Energy Sources Development Technology,China .Faculty of Petroleum , Gas Engineering,China.Influencing Factors for Threshold Pressure Gradient near the Wellbore on Tight Sand Stones Reservoirs[J].Science & Technology Review,2009,27(1). |
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| Authors: | TIAN Leng HE Shunli Education Ministry Key Laboratory of Petroleum Engineering China University of Petroleum Beijing China Education Ministry Engineering Research Center of Gas Energy Sources Development Technology China Faculty of Petroleum Gas Engineering China |
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| Affiliation: | TIAN Leng1,2,HE Shunli2,31.Education Ministry Key Laboratory of Petroleum Engineering,China University of Petroleum,Beijing 102249,China 2.Education Ministry Engineering Research Center of Gas Energy Sources Development Technology,China 3.Faculty of Petroleum , Gas Engineering,China |
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| Abstract: | In order to study the influencing factors for the threshold pressure gradient near the wells in the tight oil and gas reservoirs,the reservoir's pressure sensitivity is analyzed and the theoretical model of reservoirs near wells is established.It is shown that when the bedding fracture and minor-fractures exist,the permeability under low-effective pressure changes significantly and that cores show certain plasticity in the process of the repeated changes under the net overburden pressure.The impact of minor... |
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| Keywords: | tight oil and gas reservoirs zone near the wellbore threshold pressure gradient flow experiment |
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