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Determination method of adsorption performance oforganic drilling fluid treatment agent

A technology for organic treatment and adsorption performance, which is applied in the determination of the high-temperature adsorption performance of drilling fluid organic treatment agents and the determination of the adsorption performance of drilling fluid organic treatment agents. Curve bending and other problems, to achieve the effect of true and reliable test results and scientific measurement methods

Active Publication Date: 2016-01-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, when the concentration of the treatment agent is high, the light adsorption curve will bend, which will affect the accuracy of the measurement results.
If the treatment agent is a coloring treatment agent, the small colored components left in the supernatant will also cause a large shift in the light absorption curve, resulting in inaccurate measurement results
In addition, this evaluation method is currently only used to evaluate the adsorption performance of treatment agents on clay under normal temperature conditions

Method used

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  • Determination method of adsorption performance oforganic drilling fluid treatment agent
  • Determination method of adsorption performance oforganic drilling fluid treatment agent
  • Determination method of adsorption performance oforganic drilling fluid treatment agent

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Determination of High Temperature (150°C) Adsorption Capacity of Viscosity Reducer Sulfonated Tannin in Drilling Fluid Containing 4.0% by Weight of Clay

[0032] The specific experimental steps are as follows:

[0033] 1) Fully mixing sulfonated tannins, clay and water in proportion to prepare a drilling fluid suspension with a sulfonated tannin concentration of 1.0% by weight, wherein the weight of clay accounts for 4.0% of the total weight of clay and water.

[0034] 2) Measure the apparent viscosity (AV) and dynamic shear force (YP) of the above-mentioned drilling fluid suspension, and the results are shown in Table 1.

[0035] 3) Add the drilling fluid suspension to the high-temperature and high-pressure fluid loss instrument, raise the temperature to 150° C., and set the pressure to 3.5 MPa.

[0036] 4) After 1.0 hour, open the back pressure valve on the high-temperature and high-pressure filter loss meter, discard the filtrate obtained from the initial filtration...

Embodiment 2

[0047] Determination of High Temperature (150°C) Adsorption Capacity of Viscosity Reducer Tannin in Drilling Fluid Containing 4.0% by Weight of Clay

[0048] The experimental procedure is the same as that of Example 1, except that tannin is used instead of sulfonated tannin, and the measurement results are shown in Table 1.

Embodiment 3

[0050] Determination of High Temperature (150°C) Adsorption Capacity of Viscosity Reducer Iron Chromium Lignosulfonate in Drilling Fluid Containing 4.0% by Weight of Clay

[0051] The experimental procedure is the same as that of Example 1, except that iron chromium lignosulfonate is used instead of sulfonated tannin, and the measurement results are shown in Table 1.

[0052] The measurement result of table 1 embodiment 1-3

[0053]

[0054] Note: AV and YP of the drilling fluid suspension are measured according to the determination method in "GB / T16783.1-2006 Oil and Gas Industry Drilling Fluid Field Test Part 1: Water-based Drilling Fluid".

[0055] According to the measurement results shown in Table 1, it can be seen that the greater the adsorption amount of the viscosity reducer on the clay, the smaller the AV and YP of the drilling fluid system, which means the better the viscosity reduction effect. It shows that the greater the adsorption amount of treatment agent mo...

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Abstract

The invention provides a determination method of adsorption performance of processing agents of a drilling fluid, especially a determination method of high temperature adsorption performance of the processing agents of the drilling fluid. The method comprises: drilling fluid containing treating agents is subjected to hot filtration, for example, leakoff and back pressureat a high temperatureto obtain a liquid in the system; the percent of the characteristic elements in the treating agents in the liquid phase is determined to calculate the mass of the drilling fluid treating agents which is not adsorbed at the high temperature; and further the adsorption amount of the treating agents in the clay at the high temperature can be calculatedto achieve evaluation of the adsorption performance of the processing agent of the drilling fluid at the high temperature. The determination method is accurate and scientific, is especially suitable for high temperature adsorption performance evaluation of the treating agents of the drilling fluid, and can provide technical support for accurately designing and optimizing the molecular structure of the treating agents of the drilling fluid and preparing rational formula of the drilling fluid.

Description

technical field [0001] The invention relates to the field of performance evaluation of drilling fluid treatment agents, in particular to a method for measuring the adsorption performance of drilling fluid organic treatment agents, in particular to a method for measuring the high-temperature adsorption performance of drilling fluid organic treatment agents. Background technique [0002] Drilling fluid, commonly known as mud, is a fluid prepared from various raw materials and chemical additives. During the drilling process, it plays a role in suspending and carrying cuttings, lubricating and cooling the drill bit, stabilizing the well wall, balancing formation pressure, and transmitting hydrodynamic forces. It is an important guarantee for drilling safety and protection of oil and gas reservoirs. In the process of oil drilling, in order to adjust the performance of drilling fluid and ensure the smooth progress of drilling operations, the chemical products used are called drill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N21/71
Inventor 褚奇李涛刘匡晓李舟军宋兆辉薛玉志
Owner CHINA PETROLEUM & CHEM CORP
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