Identification method of drilling fluid type and identification method of drilling and completion waste type

A drilling fluid and waste technology, which is used in the identification of drilling fluid types and the identification of drilling and completion waste types, can solve the problem of unreliable, unobtainable results or results, unsuitable drilling fluid and drilling and completion waste types identification and other problems, to achieve high reliability, small human influence factors, and good repeatability

Active Publication Date: 2022-03-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the above means are only applicable to the situation where the treatment agent in the drilling fluid can be obtained
[0011] Drilling fluid is a very complex system, and various components interfere with each other, which will have a great impact on the test process and test results. The drilling fluid is measured and analyzed directly according to the above standards or the methods recorded in the literature. Results not available or unreliable
And in actual situations, it is difficult to effectively separate the treatment agent from the drilling fluid, so the above methods are not suitable for the type identification of the actual drilling fluid and drilling and completion waste

Method used

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  • Identification method of drilling fluid type and identification method of drilling and completion waste type
  • Identification method of drilling fluid type and identification method of drilling and completion waste type
  • Identification method of drilling fluid type and identification method of drilling and completion waste type

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0154] On August 21, 2017, a sample was taken at a depth of 3000m in the LN61-H2 well of Tarim Oilfield Company. The sample was polymer drilling fluid. The main components and mass content of the sample are as follows:

[0155]

[0156] The main physical properties of the drilling fluid are as follows:

[0157]

[0158] According to the above step 1, the liquid phase content of the drilling fluid is determined to be 94% (s=0.94), and the high temperature and high pressure filtrate of the drilling fluid is obtained.

[0159] According to above-mentioned step 2, the obtained high temperature and high pressure filtrate is detected, wherein:

[0160] When measuring total sulfur, the mass of barium sulfate plus crucible m 1 is 33486.4mg, the mass of the crucible m 2 is 32799.3mg, then the mass of total sulfur in the high-temperature and high-pressure filtrate (based on barium sulfate mass, the same below) is 687.1mg;

[0161] When measuring free sulfate, the mass of barium...

Embodiment 2

[0166] On September 8, 2017, a sample was taken at a depth of 1238.13m in Well Tudong 201 of Tarim Oilfield Company. The sample was polymer drilling fluid. The main components and mass content of the sample are as follows:

[0167]

[0168] The main physical properties of the sample are as follows:

[0169]

[0170] According to the above step 1, the liquid phase content of the drilling fluid is determined to be 92%, and the high temperature and high pressure filtrate of the drilling fluid is obtained.

[0171] The high-temperature and high-pressure filtrate was detected according to the above-mentioned step two, and the free sulfate radical mass in the high-temperature and high-pressure filtrate was measured to be 89.9 mg, and the total sulfur mass was 569.2 mg. According to calculation, the sulfo group content in the drilling fluid is 19.45 mg / mL.

[0172] The drilling fluid was tested according to the above step 3, and the asphalt content was not detected.

[0173] ...

Embodiment 3

[0175] On August 30, 2017, a sample was taken at a depth of 4820.64m in Well YD705H of Tarim Oilfield Company. The sample was sulfonated drilling fluid. The main components and mass content of the sample are as follows:

[0176]

[0177] The main physical properties of the sample are as follows:

[0178]

[0179] According to the above step 1, the liquid phase content of the drilling fluid is determined to be 72%, and the high temperature and high pressure filtrate of the drilling fluid is obtained.

[0180] The high-temperature and high-pressure filtrate was tested according to the above-mentioned step 2, and the mass of free sulfate in the high-temperature and high-pressure filtrate was measured to be 182.3 mg, and the mass of total sulfur was 2064.5 mg. After calculation, the content of sulfo groups in the drilling fluid was 59.79 mg / mL.

[0181] The drilling fluid was tested according to the above step 3, and the asphalt content was 3.27mg / mL.

[0182] According to ...

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Abstract

The invention provides a method for identifying the type of drilling fluid and a method for identifying the type of drilling and completion waste. The identification method of the drilling fluid type includes: measuring the liquid phase fraction and bitumen content of the drilling fluid to be identified, wherein the drilling fluid to be identified belongs to polymer drilling fluid or sulfonated drilling fluid; obtaining the drilling fluid filtrate of the drilling fluid to be identified, and Determine the sulfo group content of the drilling fluid filtrate; determine the sulfo group content of the drilling fluid to be identified according to the liquid phase fraction of the drilling fluid to be identified and the sulfo group content of the drilling fluid filtrate; according to the sulfo group content and asphalt content of the drilling fluid to be identified, Determine the type of drilling fluid to be identified. According to the identification method provided by the present invention, the type of drilling fluid and the type of drilling and completion waste can be accurately determined, so that the drilling and completion waste can be treated in a targeted manner. Moreover, the entire identification process can be completed through indoor experiments, with little human influence, high reliability and good repeatability.

Description

technical field [0001] The invention belongs to the field of harmless and environment-friendly treatment of petroleum, natural gas, and petroleum drilling and completion waste, and specifically relates to a method for identifying types of drilling fluids and a method for identifying types of drilling and completion wastes, in particular to a method for determining the type of drilling fluid through experiments , to distinguish between polymer drilling fluids and sulfonated drilling fluids. Background technique [0002] In the process of oil extraction, a large amount of waste such as waste drilling fluid and formation cuttings polluted by drilling fluid will be produced, which are generally referred to as drilling and completion waste. These drilling and completion wastes can be divided into polymer drilling fluid waste, sulfonated drilling fluid waste and oil-based drilling fluid waste in terms of composition and source. [0003] Polymer drilling fluid waste refers to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 李家学朱金智李宁吴晓花郭斌陈林黄超陆海瑛罗威王家梁晏智航李刚杰刘渝新
Owner PETROCHINA CO LTD
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