Method for quickly judging softening effect of water sample of water source well

A technology of water source well and water source, which is applied in the direction of testing water, sampling device, testing water hardness, etc. It can solve the problems that the residual hardness cannot meet the boiler feed water requirements, judge whether the water source well is qualified, waste of manpower and financial resources, etc., to save manpower and Material resources, high accuracy, and the effect of improving the success rate

Active Publication Date: 2019-12-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the actual operation, it was found that the residual hardness of some low-hardness water after resin exchange could not meet the requirements of boiler feed water
However, the residual hardness of some low-hardness water after resin exchange can meet the requirements of boiler feed water, so it is impossible to judge whether the water source well is qualified according to the hardness of boiler water supply.
[0004] Therefore, if the softening of the well water used as boiler replenishment water is unqualified, it means that the well selection of the water source well has failed, resulting in a lot of waste of manpower and financial resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] CD of heavy oil well in a certain block of Shengli Oilfield 21 Clean water for steam flooding comes from source well F 56 , the salinity of the water sample from the well was 14.2mmol / L and the hardness was 2.01mmol / L, where [Mg 2+ ]=1.51mmol / L, [Ca 2+ ] = 0.5mmol / L, the average value of residual hardness detected by traditional methods is 0.000241mmol / L, the hardness value is less than 0.001mmol / L, the water source well is qualified, and can be supplied to steam boilers. Plan utilizes the method of the present invention to judge water source well F quickly 56 Qualified, the specific steps are as follows:

[0036] (1) Determination of the theoretical value of the equilibrium constant K

[0037] The specific method for determining the theoretical value of the equilibrium constant K is as follows:

[0038] ① Select a standard water sample with a salinity greater than 30mmol / L and a total concentration of calcium and magnesium ions greater than 0.001mmol / L;

[0039] ...

Embodiment 2

[0061] Heavy oil well D in a block of Shengli Oilfield 25 Clean water for steam flooding comes from source well F 52 , the salinity of the well water sample is 17.6mmol / L, and the hardness is 1.04mmol / L, where [Mg 2+ ]=0.21mmol / L, [Ca 2+ ]=0.83mmol / L, the average value of residual hardness obtained by traditional method is 0.000361mmol / L, the hardness value is less than 0.001mmol / L, the water source well is qualified, and can be supplied to steam boilers. Plan utilizes the method of the present invention to judge water source well F quickly 52 Qualified, the specific steps are as follows:

[0062] (1) Determination of the theoretical value of the equilibrium constant K

[0063] The specific method for determining the theoretical value of the equilibrium constant K is as follows:

[0064] ① Select a standard water sample with a salinity greater than 30mmol / L and a total concentration of calcium and magnesium ions greater than 0.001mmol / L;

[0065] ②Use 001×7Na type strong...

Embodiment 3

[0087] Heavy oil well D in a block of Shengli Oilfield 29 Clean water for steam flooding comes from source well F 28 , the salinity of the well water sample is 37.7mmol / L and the hardness is 3.98mmol / L, where [Mg 2+ ]=1.51mmol / L, [Ca 2+ ]=2.47mmol / L, the average value of residual hardness obtained by traditional method detection is 0.00171mmol / L, and the hardness value is greater than 0.001mmol / L, the water source well is unqualified and cannot be supplied to the steam boiler. Plan utilizes the method of the present invention to judge water source well F quickly 28 Qualified, the specific steps are as follows:

[0088] (1) Determination of the theoretical value of the equilibrium constant K

[0089] The specific method for determining the theoretical value of the equilibrium constant K is as follows:

[0090] ① Select a standard water sample with a salinity greater than 30mmol / L and a total concentration of calcium and magnesium ions greater than 0.001mmol / L;

[0091] ②U...

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Abstract

The invention belongs to the technical field of water softening, and particularly relates to a method for rapidly judging a softening effect of a water sample of a water source well. The method specifically comprises the following steps: measuring a theoretical value of a balance constant K; sampling a target water source; testing the mineralization degree and the calcium and magnesium ion concentration of the target water source water sample; determining a correction value of the balance constant K; calculating a residual hardness value C of the target water source; judging a water source well. The method has the advantages of quickness, simplicity, pertinence, high operability and high accuracy, the softened residual hardness value can be speculated only by testing the mineralization degree, calcium ions and magnesium ions of the water sample of the water source well, and softening experiments or industrial softening does not need to be carried out indoors or in a steam injection center. According to the method, the water source well is firstly judged and then dug, the problems existing in a traditional method that the water source well is firstly dug and then judged are solved,the water source well digging success rate is increased, and manpower and material resources are saved.

Description

technical field [0001] The invention belongs to the technical field of water quality softening, and in particular relates to a method for quickly judging the softening effect of a water source well water sample. Background technique [0002] The producing reserves of heavy oil reservoirs in Shengli Oilfield are about 1.418 billion tons, accounting for about 1 / 3 of the total reserves of Shengli Oilfield. Its mining method is mainly thermal mining. The main method of thermal recovery is to inject high-temperature water vapor into the oil layer to reduce the viscosity of heavy oil, so as to achieve the purpose of enhancing the recovery factor. Steam injection boilers require a large amount of water resources to provide steam, and the source of water is usually a water source well. [0003] The general process of steam production from water source well water is as follows: the steam injection center drills the water source well, transports the well water to the steam injection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18G01N1/10
CPCG01N1/10G01N33/1853
Inventor 潘永强刘雨文袁长忠于丹丹王冠张守献徐鹏徐闯冯逸茹宋永亭
Owner CHINA PETROLEUM & CHEM CORP
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