US 9,429,012 B2 · Downhole salinity measurement

Abstract

A downhole salinity measurement and logging sensor system has multiple cells, each to measure conductivity, temperature and pressure of fluids at depths of interest in a wellbore. The multiple cells protect against effects of non-homogeneous wellbore fluids. The system also determines salinity of the liquid in the wellbore from conductance measurements, and stores the salinity data along with the temperature and pressure readings from the well. The sensors of conductivity, temperature and pressure are made using micro-fabrication technologies, and the system is packaged to comply with harsh downhole environments. The system may be deployed in the well with coiled tubing (CT), wireline or vehicles with a robotic system. The system can be deployed with an onboard memory, or with wireline surface access for real time access to measurement data or programming the device.

Claims28

Dependent claims

An apparatus for measuring salinity of fluid in a well bore comprising:

(a) a sonde body for moving in the well bore to a depth of interest, the sonde body receiving well bore fluid therein;
(b) the sonde body having a fluid sample chamber therein and a conductivity cell mounted in the fluid sample chamber;
(c) the sonde body further having a plurality of fluid passage ports formed therein to allow well bore fluid presence and containment in an interior portion of the sonde to obtain sample volumes of the well bore fluid;
(d) the fluid sample chamber having fluid ports for passage of well bore fluids from the interior portions of the sonde body into the fluid sample chamber;
(e) at least one fluid conductivity sensor mounted in the fluid sample chamber and measuring conductivity parameters of the well bore fluid sample volume in the sample chamber;
and
(f) a data processor mounted in the sonde and determining salinity of the sample volume of well bore fluid at the depth of interest based on the measured conductivity parameters of the well bore fluid in the sample chamber.

4 more elements

Dependencies are inferred from the claim text.

Downhole salinity measurement

Life of this patent

Downhole salinity measurement

Life of this patent

Abstract

Claims28