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1. 发明授权

EP0299823B1 Determining a formation porosity from neutron logging information 失效
标题翻译：用于通过中子测井装置确定地球岩层的孔隙率的方法。
公开(公告)号：EP0299823B1
公开(公告)日：1994-03-02
申请号：EP88401623.9
申请日：1988-06-27
申请人： SCHLUMBERGER LIMITED , SOCIETE DE PROSPECTION ELECTRIQUE SCHLUMBERGER
发明人： Ellis, Darwin E. , Scott, Hubert D. , Flaum, Charles
IPC分类号： G01V5/10
CPC分类号： G01V5/107 , G01V5/10

2. 发明公开

EP0299823A2 Determining a formation porosity from neutron logging information 失效
标题翻译：用于通过中子测井装置确定地球岩层的孔隙率的方法。
公开(公告)号：EP0299823A2
公开(公告)日：1989-01-18
申请号：EP88401623.9
申请日：1988-06-27
申请人： SCHLUMBERGER LIMITED , SOCIETE DE PROSPECTION ELECTRIQUE SCHLUMBERGER
发明人： Ellis, Darwin E. , Scott, Hubert D. , Flaum, Charles
IPC分类号： G01V5/10
CPC分类号： G01V5/107 , G01V5/10
摘要： A method for determining the porosity of a subsurface geological formation traversed by a borehole is provided. The method generally comprises obtaining a means which relates ranges of apparent formation porosity ( T ) according to a predetermined equation. The predetermined equation relates the apparent porosity to a function of a modified migration length which is obtained in a semi-empirical manner (i.e. physics modified by data). The modified migration length includes a slowing down length and a diffusion length, but causes at least the diffusion length to be a function of the slowing down length. The means which relates the apparent porosity to salinity, E, matrix and fluid constituents, and ϕ T solves a forward problem. Thus, the inverse problem of determining true porosity may be solved by obtaining determinations of salinity, formation matrix and fluid constituents, E, and ϕa, and using the relating means to provide the true porosity. The provided method properly and separately accounts for the effects of capture cross section and salinity, and can be used to correct the apparent porosity determination of a neutron-neutron tool, regardless of the formation matrix or formation fluid constituents.
摘要翻译：确定性采矿提供了一种由井眼所横断地下地质地层的孔隙度的方法。该方法的基因集会包括获得装置，它涉及表观地层孔隙度的范围（PHI a）中确定的由一个中子中子测井，地层流体盐度，形成总俘获截面（SIGMA），地层基质和流体成分开采，和真正的地层孔隙度（PHI T）雅丁到预定等式。预定方程涉及的表观孔隙率，以修改的迁移长度的函数的所有其以半经验的方式获得（即，通过物理数据修改）。修改后的迁移长度包括减慢长度和扩散长度，但至少使扩散长度是慢化长度的函数。其涉及的表观孔隙率，以盐度，SIGMA，矩阵和流体成分，和phi T上的手段解决问题进。因此，逆确定性挖掘问题-的真气孔率可以通过获得盐度，地层基质和流体成分的测定，SIGMA解决，和Phi一个，并使用有关装置，以提供真正的孔隙度。适当地提供和分别的方法占捕获截面和盐度的影响，并且可以被用于校正中子中子工具的表观孔隙率的确定，不管形成矩阵或地层流体的成分的。

3. 发明公开

EP0299823A3 Determining a formation porosity from neutron logging information 失效
标题翻译：从中东地区记录信息确定形成孔隙度
公开(公告)号：EP0299823A3
公开(公告)日：1991-10-09
申请号：EP88401623.9
申请日：1988-06-27
申请人： SCHLUMBERGER LIMITED , SOCIETE DE PROSPECTION ELECTRIQUE SCHLUMBERGER
发明人： Ellis, Darwin E. , Scott, Hubert D. , Flaum, Charles
IPC分类号： G01V5/10
CPC分类号： G01V5/107 , G01V5/10
摘要： A method for determining the porosity of a subsurface geological formation traversed by a borehole is provided. The method generally comprises obtaining a means which relates ranges of apparent formation porosity ( T ) according to a predetermined equation. The predetermined equation relates the apparent porosity to a function of a modified migration length which is obtained in a semi-empirical manner (i.e. physics modified by data). The modified migration length includes a slowing down length and a diffusion length, but causes at least the diffusion length to be a function of the slowing down length. The means which relates the apparent porosity to salinity, E, matrix and fluid constituents, and ϕ T solves a forward problem. Thus, the inverse problem of determining true porosity may be solved by obtaining determinations of salinity, formation matrix and fluid constituents, E, and ϕa, and using the relating means to provide the true porosity. The provided method properly and separately accounts for the effects of capture cross section and salinity, and can be used to correct the apparent porosity determination of a neutron-neutron tool, regardless of the formation matrix or formation fluid constituents.

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