公开(公告)号：US20160168986A1

公开(公告)日：2016-06-16

申请号：US14908175

申请日：2014-07-23

Applicant: BP EXPLORATION OPERATING COMPANY LIMITED

Inventor： Shuan Raymond HURST ,  Roderic Lewis JONES

IPC: E21B49/08 ,  G01N30/74 ,  G01N21/33

CPC classification number: E21B49/08 ,  C09K8/528 ,  E21B37/06 ,  E21B2049/085 ,  G01N21/33 ,  G01N30/74

Abstract: A computer-implemented method and corresponding system for determining the concentration of one or more scale inhibiting polymers in a fluid received from one or more porous and permeable hydrocarbon-bearing rock formations is provided. Each polymer comprises a different chemical marker and the fluid comprises a plurality of commingled said scale inhibiting polymers. The method comprises receiving first input data representing a measured absorption spectrum, within a predetermined wavelength range, of the commingled scale inhibiting polymers, wherein the measured absorption spectrum is measured using a detector after chromatographic separation of the fluid; receiving second input data representing reference absorption spectra, the reference absorption spectra comprising: a) an absorption spectrum, over the predetermined wavelength range, of each of the scale inhibiting polymers; and b) baseline reference absorption spectra of other chemicals having absorbance values within the predetermined wavelength range that are expected to be present in the fluid; inputting the first and second input data into a computer program; and operating the computer program. The computer program is operated to, at each of a plurality of discrete time steps over an elution time from the separation, determine a factor for each reference absorption spectrum that results in a modelled spectrum comprising a best-fit linear combination of the second input data to the first input data. For each scale inhibiting polymer, the computer program also operates to use the factors corresponding to the absorption spectrum of said scale inhibiting polymer that have been determined for a predetermined number of said discrete time steps to determine an indication of the concentration of the scale inhibiting polymer.

Abstract translation: 提供了一种用于确定从一个或多个多孔和可渗透的含烃岩层接收的流体中的一种或多种防垢聚合物的浓度的计算机实现的方法和相应的系统。 每个聚合物包含不同的化学标记，并且流体包含多个混合的阻垢聚合物。 该方法包括接收代表混合阻垢聚合物的预定波长范围内的测量吸收光谱的第一输入数据，其中在流体色谱分离之后使用检测器测量测量的吸收光谱; 接收表示参考吸收光谱的第二输入数据，所述参考吸收光谱包括：a）每种抑垢聚合物的预定波长范围的吸收光谱; 和b）预期存在于流体中的预定波长范围内的吸光度值的其它化学品的基准参考吸收光谱; 将第一和第二输入数据输入计算机程序; 并操作计算机程序。 计算机程序在从分离出的洗脱时间的多个离散时间步长中的每一个处操作，确定每个参考吸收光谱的因子，其导致包含第二输入数据的最佳拟合线性组合的建模频谱 到第一个输入数据。 对于每种防垢聚合物，计算机程序还操作以使用与已经确定了预定数量的所述离散时间步骤所确定的所述防垢聚合物的吸收光谱相对应的因子来确定抑垢聚合物浓度的指示 。