考虑颗粒变形和颗粒间变形的孔隙压缩系数
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摘要
目前,油藏工程研究对岩石基础物性参数孔隙压缩系数争议颇多,其根本问题是对岩石的表观体积、基质颗粒体积、孔隙体积的应力应变机理尚不清楚。文中在对Terzaghi和Skempton 2个经典有效应力原理深入分析基础上,综合考虑颗粒变形和颗粒间变形,采用2种方法系统地推导了多孔介质的3个体积随流体压力变化的关系,建立了精确计算孔隙压缩系数的新关系式,并进行了规律分析与实例验证。研究表明:孔隙体积变化与颗粒变形、颗粒间变形同时相关,且多数岩石颗粒间变形远大于颗粒变形;孔隙压缩系数远大于表观体积压缩系数,表观体积压缩系数又大于颗粒压缩系数;"高孔高压缩"逻辑规律适用于表观体积压缩系数,而孔隙压缩系数由于孔隙体积自身是分母,与孔隙度负相关;孔隙压缩系数新关系式与实验测试结果和Hall图版反映的规律一致。
At present, there are many controversies about the study of pore compression coefficient, the basic physical parameter of rock in reservoir engineering research. The essential issue of these arguments is that the stress-strain relationship among total volume, particle volume, and pore volume of porous medium is not clear, which needs to be clarified. Based on deep analysis of the classical effective stress principles of Terzaghi and Skempton, the relationship between three types of volumes of porous media and the fluid pressure change was systematically deduced by two methods considering both granular deformation and inter-granular deformation, a new relation formula of pore compression coefficient was established, and regular analysis and case verification was carried out. The results indicate that pore volume deformation is related to both granular deformation and inter-granular deformation,and inter-granular deformation of most rocks is much larger than granular deformation; pore compression coefficient is much larger than total volume compression coefficient, which is larger than particle volume compression coefficient; the "high compression with high porosity" logic applies to total volume compression coefficient, while porosity compression coefficient is negatively correlated with porosity since pore volume itself is the denominator; the new relational formula is consistent with experimental test results and Hall curve chart.
At present, there are many controversies about the study of pore compression coefficient, the basic physical parameter of rock in reservoir engineering research. The essential issue of these arguments is that the stress-strain relationship among total volume, particle volume, and pore volume of porous medium is not clear, which needs to be clarified. Based on deep analysis of the classical effective stress principles of Terzaghi and Skempton, the relationship between three types of volumes of porous media and the fluid pressure change was systematically deduced by two methods considering both granular deformation and inter-granular deformation, a new relation formula of pore compression coefficient was established, and regular analysis and case verification was carried out. The results indicate that pore volume deformation is related to both granular deformation and inter-granular deformation,and inter-granular deformation of most rocks is much larger than granular deformation; pore compression coefficient is much larger than total volume compression coefficient, which is larger than particle volume compression coefficient; the "high compression with high porosity" logic applies to total volume compression coefficient, while porosity compression coefficient is negatively correlated with porosity since pore volume itself is the denominator; the new relational formula is consistent with experimental test results and Hall curve chart.
引文
[1]李传亮.岩石压缩系数与孔隙度的关系[J].中国海上油气(地质),2003,17(5):355-358.
[2]李传亮.再谈岩石的压缩系数:回应高有瑞博士[J].中国海上油气,2011,25(4):85-87.
[3]李传亮.再谈岩石的压缩系数:回应王厉强博士[J].新疆石油地质,2012,33(1):125-127.
[4]李传亮.实测岩石压缩系数偏高的原因分析[J].大庆石油地质与开发,2005,24(5):53-54.
[5]HALL H N.Compressibility of reservoir rocks[J].Journal of Petroleum Technology,1953,5(1):17-19.
[6]王厉强,李正科,袁昭,等.实测岩石孔隙压缩系数偏高原因再分析:与李传亮教授商榷[J].新疆石油地质,2012,33(3):379-381.
[7]张津宁,张金功.柴西地区变围压条件下储层物性变化规律[J].特种油气藏,2016,23(5):114-118
[8]高有瑞,刘艳,时付更.基质型灰岩储层岩石压缩系数的确定[J].中国海上油气,2011,23(4):247-250.
[9]罗瑞兰.关于低渗致密储层岩石的应力敏感问题:与李传亮教授探讨[J].石油钻采工艺,2010,32(2):126-130.
[10]任勇,孙艾茵.岩石弹性变形中孔隙度变化的研究[J].新疆石油地质,2005,26(3):336-338.
[11]TERZAGHI K.Die berechnung der curchlassigkeitziffer des tones aus dem verlauf der hydrodynamischen spannungserscheinumgen[J].Sber Akad Wiss Wien,1923,132(3):125-138.
[12]曹廷宽,刘成川,曾焱,等.基于CT扫描的低渗砂岩分形特征及孔渗参数预测[J].断块油气田,2017,24(5):657-661.
[13]XU H F,XIE K H.Effective stress in soils under different saturation conditions[J].Journal of Central South University of Technology,2011,18(6):2137-2142.
[14]李传亮,孔祥言,徐献之.胶结多孔介质的双重有效应力[J].自然杂志,1999,21(5):288-292.
[15]李海鹏,王道串,李蒋军,等.储层岩石压缩系数的一种预测方法[J].断块油气田,2009,16(1):45-47.
[16]聂法健,田巍,国殿斌,等.深层高压低渗透储层应力敏感性研究[J].断块油气田,2016,23(6):788-792.
[17]张玲,魏绍蕾,黄学斌,等.基于综合权重法的页岩气储量评价方法探讨[J].实验石油地质,2017,39(5):694-699.
[2]李传亮.再谈岩石的压缩系数:回应高有瑞博士[J].中国海上油气,2011,25(4):85-87.
[3]李传亮.再谈岩石的压缩系数:回应王厉强博士[J].新疆石油地质,2012,33(1):125-127.
[4]李传亮.实测岩石压缩系数偏高的原因分析[J].大庆石油地质与开发,2005,24(5):53-54.
[5]HALL H N.Compressibility of reservoir rocks[J].Journal of Petroleum Technology,1953,5(1):17-19.
[6]王厉强,李正科,袁昭,等.实测岩石孔隙压缩系数偏高原因再分析:与李传亮教授商榷[J].新疆石油地质,2012,33(3):379-381.
[7]张津宁,张金功.柴西地区变围压条件下储层物性变化规律[J].特种油气藏,2016,23(5):114-118
[8]高有瑞,刘艳,时付更.基质型灰岩储层岩石压缩系数的确定[J].中国海上油气,2011,23(4):247-250.
[9]罗瑞兰.关于低渗致密储层岩石的应力敏感问题:与李传亮教授探讨[J].石油钻采工艺,2010,32(2):126-130.
[10]任勇,孙艾茵.岩石弹性变形中孔隙度变化的研究[J].新疆石油地质,2005,26(3):336-338.
[11]TERZAGHI K.Die berechnung der curchlassigkeitziffer des tones aus dem verlauf der hydrodynamischen spannungserscheinumgen[J].Sber Akad Wiss Wien,1923,132(3):125-138.
[12]曹廷宽,刘成川,曾焱,等.基于CT扫描的低渗砂岩分形特征及孔渗参数预测[J].断块油气田,2017,24(5):657-661.
[13]XU H F,XIE K H.Effective stress in soils under different saturation conditions[J].Journal of Central South University of Technology,2011,18(6):2137-2142.
[14]李传亮,孔祥言,徐献之.胶结多孔介质的双重有效应力[J].自然杂志,1999,21(5):288-292.
[15]李海鹏,王道串,李蒋军,等.储层岩石压缩系数的一种预测方法[J].断块油气田,2009,16(1):45-47.
[16]聂法健,田巍,国殿斌,等.深层高压低渗透储层应力敏感性研究[J].断块油气田,2016,23(6):788-792.
[17]张玲,魏绍蕾,黄学斌,等.基于综合权重法的页岩气储量评价方法探讨[J].实验石油地质,2017,39(5):694-699.