公开(公告)号：US20170115428A1

公开(公告)日：2017-04-27

申请号：US14920495

申请日：2015-10-22

Applicant: Schlumberger Technology Corporation

Inventor： Tong Zhou ,  James A. Grau

IPC: G01V5/04 ,  G01V5/10

CPC classification number: G01V5/045 ,  G01V5/101 ,  G01V5/102

Abstract: A method for analyzing a formation includes entering into a computer a number of detected gamma rays resulting from imparting neutrons into the formation. The detected gamma rays are characterized by energy levels thereof. A number of detected gamma rays in each energy level comprises a measured spectrum. In the computer, a non-Gaussian filter is applied to a reference spectrum to match the measured spectrum in shape. The filtered reference spectrum and measured spectrum are used to determine a fractional volume of at least one component of the formation.

公开(公告)号：US20160349398A1

公开(公告)日：2016-12-01

申请号：US14726050

申请日：2015-05-29

Applicant: Schlumberger Technology Corporation

Inventor： Tong Zhou ,  Christian Stoller ,  James Leslie Thornton ,  David Alan Rose

IPC: G01V5/10 ,  E21B49/00

CPC classification number: G01V5/10 ,  G01N33/24 ,  G01V5/104 ,  G01V5/107 ,  G01V5/108

Abstract: A method for determining a fractional volume of at least one component of a formation includes entering into a computer a number of detected radiation events resulting from imparting neutrons into the formation at an energy level of at least 1 million electron volts (MeV). The detected radiation events correspond to at least one of an energy level of the imparted neutrons and thermal or epithermal energy neutrons. A measurement of at least one additional petrophysical parameter of the formation is made. The at least one additional petrophysical parameter measurement and at least one of a fast neutron cross-section and a thermal neutron cross-section determined from the detected radiation events are used in the computer to determine the fractional volume of the at least one component of the formation. In another embodiment, the fast neutron cross-section and the thermal neutron cross-section may be used on combination to determine the fractional volume.

Abstract translation: 确定地层的至少一个部件的分数体积的方法包括：以至少1百万电子伏特（MeV）的能级将中子递送到地层中来进入计算机中的多个检测到的辐射事件。 检测到的辐射事件对应于所赋予的中子和热或超热能中子的能级中的至少一个。 进行地层至少一个附加岩石物理参数的测量。 在计算机中使用从检测到的辐射事件确定的至少一个额外的岩石物理参数测量以及快中子横截面和热中子截面中的至少一个，以确定所述至少一个部件的分数体积 形成。 在另一个实施例中，快中子横截面和热中子横截面可以组合使用以确定分数体积。

公开(公告)号：US20160170079A1

公开(公告)日：2016-06-16

申请号：US15018732

申请日：2016-02-08

Applicant: Schlumberger Technology Corporation

Inventor： Tong Zhou ,  David Alan Rose

IPC: G01V5/10

CPC classification number: G01V5/102 ,  G01V5/101

Abstract: A method for pulsed neutron well logging of a subsurface formation, includes irradiating the formation with a plurality of bursts of neutrons of a group of selected durations; detecting gamma rays resulting from interaction of the neutrons during a group of selected time gates which contains at least some early and late gamma ray counts. The gamma rays are detected at at least two axially spaced apart locations from a position of the irradiating. In a computer, a ratio TRat is determined between the sum of detected gamma rays at a first axial spacing to the sum at a second axial spacing. A borehole correction is performed according to a function related to the ratio TRat before converting the ratio TRat to a hydrogen index or porosity of the subsurface formation.

Abstract translation: 用于地下地层的脉冲中子测井的方法包括用多组选定持续时间的一组中子照射地层; 检测在包含至少一些早期和晚期伽马射线计数的所选择的时间门组期间由中子的相互作用产生的伽马射线。 在与照射位置的至少两个轴向间隔开的位置处检测伽马射线。 在计算机中，在第一轴向间隔处的检测到的伽马射线之和与第二轴向间隔处的和之间确定比率TRat。 在将比率TRat转换为地下地层的氢指数或孔隙率之前，根据与比率TRat相关的函数进行井眼校正。

公开(公告)号：US09310515B2

公开(公告)日：2016-04-12

申请号：US14222397

申请日：2014-03-21

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Tong Zhou ,  Christian Stoller

IPC: G01V5/12 ,  G01V5/10 ,  G01N33/24

CPC classification number: G01V5/107 ,  G01N33/24 ,  G01V5/101

Abstract: A method for determining a petrophysical property of a formation includes detecting radiation events resulting from imparting neutrons into the formation at an energy level of at least 1 MeV. The petrophysical property is determined from an elastic scattering cross section of the formation. The elastic scattering cross-section related to a number of detected radiation events.

Abstract translation: 用于确定地层的岩石物理性质的方法包括检测以至少1MeV的能级施加中子到地层中产生的辐射事件。 岩石物理性质由地层的弹性散射截面确定。 与多个检测到的辐射事件相关的弹性散射截面。

公开(公告)号：US09268056B2

公开(公告)日：2016-02-23

申请号：US13851872

申请日：2013-03-27

Applicant: Schlumberger Technology Corporation

Inventor： Tong Zhou ,  David Rose

IPC: G01V5/10

CPC classification number: G01V5/102 ,  G01V5/101

Abstract: A method for pulsed neutron well logging of a subsurface formation, includes irradiating the formation with a plurality of bursts of neutrons of a group of selected durations; detecting gamma rays resulting from interaction of the neutrons during a group of selected time gates which contains at least some early and late gamma ray counts. The gamma rays are detected at at least two axially spaced apart locations from a position of the irradiating. A weighted sum of the numbers of gamma rays detected in each of the time gates is calculated. A ratio of the weighted sum of detected gamma rays at a first axial spacing to the weighted sum at a second axial spacing is determined. The ratio is used to determine a hydrogen index of the subsurface formation.

Abstract translation: 用于地下地层的脉冲中子测井的方法包括用多组选定持续时间的一组中子照射地层; 检测在包含至少一些早期和晚期伽马射线计数的所选择的时间门组期间由中子的相互作用产生的伽马射线。 在与照射位置的至少两个轴向间隔开的位置处检测伽马射线。 计算在每个时间门中检测到的伽马射线的数量的加权和。 确定在第一轴向间隔处的检测到的伽马射线的加权和与第二轴向间隔处的加权和的比率。 该比率用于确定地下地层的氢指数。

公开(公告)号：US20140042311A1

公开(公告)日：2014-02-13

申请号：US13851872

申请日：2013-03-27

Applicant: Schlumberger Technology Corporation

Inventor： Tong Zhou ,  David Rose

IPC: G01V5/10

CPC classification number: G01V5/102 ,  G01V5/101

Abstract: A method for pulsed neutron well logging of a subsurface formation, includes irradiating the formation with a plurality of bursts of neutrons of a group of selected durations; detecting gamma rays resulting from interaction of the neutrons during a group of selected time gates which contains at least some early and late gamma ray counts. The gamma rays are detected at at least two axially spaced apart locations from a position of the irradiating. A weighted sum of the numbers of gamma rays detected in each of the time gates is calculated. A ratio of the weighted sum of detected gamma rays at a first axial spacing to the weighted sum at a second axial spacing is determined. The ratio is used to determine a hydrogen index of the subsurface formation.

Abstract translation: 用于地下地层的脉冲中子测井的方法包括用多组选定持续时间的一组中子照射地层; 检测在包含至少一些早期和晚期伽马射线计数的所选择的时间门组期间由中子的相互作用产生的伽马射线。 在与照射位置的至少两个轴向间隔开的位置处检测伽马射线。 计算在每个时间门中检测到的伽马射线的数量的加权和。 确定在第一轴向间隔处的检测到的伽马射线的加权和与第二轴向间隔处的加权和的比率。 该比率用于确定地下地层的氢指数。