A performance evaluation device and evaluation method of a barite blocking agent

An evaluation device, barite technology, applied in the direction of measurement device, suspension and porous material analysis, instrument, etc., can solve the problem of limited guiding role of barite blocking agent, unable to truly reflect blocking blocking performance, etc. The effect of dosage optimization and awareness enhancement

Active Publication Date: 2020-09-04
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The performance evaluation methods of these two barite plugging agents are both directly comparing the barite mass change after the barite is dissolved by the plugging agent in a static environment to evaluate the plugging removal performance of the plugging agent on the core , cannot truly reflect the plugging removal performance of the plugging agent on the core during the actual production process
Therefore, it has limited guidance on the field application of barite plugging remover

Method used

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  • A performance evaluation device and evaluation method of a barite blocking agent
  • A performance evaluation device and evaluation method of a barite blocking agent
  • A performance evaluation device and evaluation method of a barite blocking agent

Examples

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Embodiment 1

[0113] Such as figure 2 As shown, the simulation evaluates the plugging removal performance of the barite plugging agent after the reservoir of the oil well is damaged by barite drilling fluid. Among them, the diameter of the core is 25.4-50.8 mm, and the length is 30-100 mm.

[0114] (1) Connect the experimental process, cover the core with an annular rubber sleeve, and put it into the core holder, where the right end of the core must be completely parallel to the right end of the core holder, so as to simulate the barite drilling fluid and the reservoir The process of contact injury, such as figure 2 As shown, after the core is placed, the first valve V1 is opened, the first pump 102 applies confining pressure to the core in the holder 101, the pressure read from the first pressure sensor P1 is the confining pressure, and the confining pressure should be higher than that of barite During the drilling fluid circulation damage process, the pressure of the barite plugging a...

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Abstract

The invention discloses a performance evaluation device for a barite blocking remover and an evaluation method thereof. The performance evaluation device for the barite blocking remover comprises a rock core clamping system, a liquid measuring permeability system, a barite drilling fluid injection system, a barite blocking remover injection system and a temperature control system, wherein the rockcore clamping system comprises a clamper capable of clamping a rock core and a first pump connected to the clamp for applying a confining pressure to the rock core; the liquid measuring permeabilitysystem is connected to the first end of the clamper; the barite drilling fluid injection system is connected to the second end of the clamper; the barite blocking remover injection system is connectedto the second end of the clamper; and the temperature control system is used for heating liquids in the liquid measuring permeability system, the barite drilling fluid injection system and the bariteblocking remover injection system and heating the clamper. The device is closer to the field actual application condition in the evaluation process of the barite blocking remover.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a performance evaluation device and an evaluation method of a barite plugging agent. Background technique [0002] In recent years, with the vertical development of exploration and development of oil and gas resources, the number of deep wells and ultra-deep wells has increased. Since the formation pressure coefficient of deep and ultra-deep wells is usually high, overflow, kick, and even blowout may occur during drilling with conventional drilling fluid. In order to ensure the safety and smooth progress of drilling operations, weighting agents such as barite and limestone are usually used to weight the drilling fluid to prevent overflow, kick or blowout during drilling. [0003] Barite is currently the most widely used drilling fluid weighting agent, and can be used for weighting with a density not exceeding 2.30g / cm 3 drilling fluid. Most of the currently used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/082
Inventor 彭欢桑宇马辉运杨建潘琼彭钧亮王斌
Owner PETROCHINA CO LTD
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