RU2012104359A - METHOD AND SYSTEM OF ASSESSMENT OF QUALITY OF CEMENTATION IN THE PROCESS OF DOWNLOAD - Google Patents

Abstract

1. A method for evaluating the quality of cementing a well, comprising the steps of: measuring the parameters of a solution injected into a well, the measured parameters including the volume of the solution and at least one of: temperature, pressure, electrical conductivity and density of the solution; fluid entering at least one receiving tank at the well exit, wherein the measured parameters include the fluid volume and at least one of: temperature, pressure, electrical conductivity and fluid density; meters of fluid when it enters at least one barn at the exit of the well, and at least one measured parameter is volume; based on the measurements taken, at least the difference between the volume of the injected solution and the displaced fluid is determined according to the following expression: where is the difference between the volume of the injected solution and the displaced fluid, is the volume of cement injected into the well, is the volume of fluid entering the receiving tank at the outlet of the well, is the volume of fluid and it enters the drill barn; On the basis of predefined overall dimensions of the annulus and a certain difference in volumes, the quality of cementation is evaluated. 2. The method according to claim 1, in which the volume of fluid when it enters at least one barn is measured using a device for measuring the flow rate of freely flowing liquids. The method according to claim 1, further comprising the step of visualizing the results in a data display unit. The method of claim 1, further comprising transmitting the data

Claims (10)

1. A method for assessing the quality of cementing a well, comprising stages in which: measuring the parameters of the solution injected into the well, and the measured parameters include the volume of the solution and at least one of: temperature, pressure, conductivity and density of the solution; measuring the parameters of the fluid entering at least one receiving tank at the exit of the well, and the measured parameters include the volume of the fluid and at least one of: temperature, pressure, electrical conductivity and density of the fluid; measuring fluid parameters when it enters at least one barn at the exit of the well, with at least one measurable parameter being volume; based on the measurements taken, at least the difference between the volume of the injected solution and the displaced fluid is determined according to the following expression: $$\Delta V=V_3-V_{\text{E}}-V_{\mathrm{BUT}}$$

, Where $$\Delta V$$

- the aforementioned difference between the volume of the injected solution and the displaced fluid, $$V_3$$

- the volume of cement injected into the well, $$V_{\text{E}}$$

- the volume of fluid entering the receiving tank at the exit of the well, $$V_{\mathrm{BUT}}$$

- the volume of fluid when it enters the barn; and on the basis of predefined overall dimensions of the annulus and a certain difference in volumes, the quality of cementation is evaluated. 2. The method according to claim 1, in which the volume of fluid when it enters at least one barn is measured using a device for measuring the flow rate of freely flowing liquids. 3. The method according to claim 1, further comprising the step of visualizing the results in a data display unit. 4. The method according to claim 1, further comprising the step of transmitting data using the data transmission unit. 5. The method according to claim 1, additionally containing a stage at which stop cementing when a buffer fluid appears at the exit of the well. 6. A system for evaluating the quality of well cementing (SOCS), comprising: an inlet measuring unit comprising sensors for measuring parameters of the solution being injected into the well, the measured parameters including the volume of the solution and at least one of: temperature, pressure, electrical conductivity and density of the solution; a measuring unit for receiving tanks, containing sensors for measuring the parameters of the fluid entering at least one receiving tank at the exit of the well, and the measured parameters include the volume of the fluid and at least one of: temperature, pressure, electrical conductivity and fluid density , a drilling barn measuring unit comprising at least one sensor for measuring a fluid parameter when it enters at least one drilling barn, the volume being at least one measured parameter, and a computing unit associated with the measuring unit at the input, the measuring unit of the barn and the measuring unit of the receiving tanks, configured to on the basis of the measured parameters to determine at least the difference between the volume of the injected solution and the displaced fluid according to the following expression: $$\Delta V=V_3-V_{\text{E}}-V_{\mathrm{BUT}}$$

, Where $$\Delta V$$

- the aforementioned difference between the volume of the injected solution and the displaced fluid, $$V_3$$

- the volume of cement injected into the well, $$V_{\text{E}}$$

- the volume of fluid entering the receiving tank at the exit of the well, $$V_{\mathrm{BUT}}$$

- the volume of fluid when it enters the barn, and on the basis of predefined overall dimensions of the annulus and a certain difference in volumes to evaluate the quality of cementation. 7. The system according to claim 6, in which the measuring unit of the barn contains at least one device for measuring the flow of freely flowing liquids. 8. The system of claim 6, further comprising a data display unit. 9. The system of claim 6, further comprising a data transmission unit. 10. The system according to claim 6, further comprising a control unit, wherein the computing unit is further configured to determine, based on the measured parameters, that a buffer fluid has appeared at the well exit and provide the appropriate information to the control unit so that it generates a command to stop cementing .