Drilling pressure-bearing plugging agent for oil-gas wells and preparation and application thereof

A plugging agent, oil and gas well technology, applied in the field of oil drilling, to achieve the effect of safe construction, high strength and strong adaptability

Inactive Publication Date: 2014-07-16
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a pressure-bearing plugging agent for oil and gas well drilling and its preparation and application, which can ensure the smooth progress of drilling projects in areas prone to leakage and reduce the cost of plugging and drilling. Solving the technical problems of pressure-bearing plugging in complex formations can enhance the adaptability and retention of plugging materials in complex lossy layers with fractures and large pores, and help the plugging agent to quickly form high-strength plugging layers in the lost channels. Thus effectively improving the pressure-bearing plugging strength and success rate, the pressure-bearing plugging agent of the present invention has the characteristics of simple formula, high pressure-bearing strength, and easy preparation and construction

Method used

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  • Drilling pressure-bearing plugging agent for oil-gas wells and preparation and application thereof
  • Drilling pressure-bearing plugging agent for oil-gas wells and preparation and application thereof
  • Drilling pressure-bearing plugging agent for oil-gas wells and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The leak-stopping agent consists of the following components in parts by weight:

[0021] 50 parts of oil well cement, 0.8 parts of elastic sponge fiber, 3.0 parts of mica powder, 10.0 parts of calcareous soil, 50 parts of finely ground slag, and clear water with a solid-to-liquid weight ratio of 1.80, wherein the solids include mica powder, calcareous soil, and oil well cement And ground slag, the liquid is clear water.

[0022] The preparation method and use method of the pressure-bearing plugging agent for oil and gas well drilling, the steps are as follows:

[0023] Preparation: the materials are added into clean water according to the specified ratio, mixed and stirred, and prepared into a pressure-bearing plugging agent for oil and gas well drilling.

[0024] Use: run down the bare drill pipe to the top 700-400m of the lost zone, open the well, replace the pressure-bearing lost circulation agent to the bottom of the light drill pipe, then close the well, squeeze ...

Embodiment 2

[0026] The leak-stopping agent consists of the following components in parts by weight:

[0027] 100 parts of oil well cement, 0.8 parts of elastic sponge fiber, 3.0 parts of mica powder, 10.0 parts of calcareous soil, 0 parts of finely ground slag, and clear water with a solid-to-liquid weight ratio of 1.80, wherein the solids include mica powder, calcareous soil, and oil well cement And ground slag, the liquid is clear water.

[0028] For the preparation method and application method of the pressure-bearing plugging agent for oil and gas well drilling, refer to Example 1.

Embodiment 3

[0030] The leak-stopping agent consists of the following components in parts by weight:

[0031] 100 parts of oil well cement, 0.8 parts of elastic sponge fiber, 3.0 parts of mica powder, 10.0 parts of calcareous soil, 0 part of finely ground slag, and clear water with a solid-to-liquid weight ratio of 1.60, wherein the solids include mica powder, calcareous soil, and oil well cement And ground slag, the liquid is clear water.

[0032] For the preparation method and application method of the pressure-bearing plugging agent for oil and gas well drilling, refer to Example 1.

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Abstract

The invention discloses a drilling pressure-bearing plugging agent for oil-gas wells. The drilling pressure-bearing plugging agent is a mixture of an elastic sponge fiber, oil well cement, grounded slag, calcium bentonite, mica powder and clean water. The drilling pressure-bearing plugging agent can be applied to drilling pressure-bearing plugging of the oil-gas wells. The invention also provides a preparation method of the drilling pressure-bearing plugging agent. The plugging agent disclosed by the invention can effectively plug fractured leakage formation and macroscopic permeable leakage formation, and the plugging agent is high in pressure-bearing plugging strength, strong in formation adaptability, safe to construct, and easy to construct on the scene, and the formula is reduced.

Description

technical field [0001] The invention belongs to the technical field of oil drilling, and in particular relates to a pressure-bearing plugging agent for oil and gas well drilling and its preparation and application. Background technique [0002] An important problem faced in the pressure-bearing plugging construction of large-pore and fractured complex loss wells is that the plugging agent cannot effectively reside in the lost zone, coupled with the flow and scour of the formation water in the lost zone, it is often diluted and It is difficult to form an effective sealing layer in the lost zone, and the bearing strength of the formation cannot be improved. [0003] At present, the solution to this problem is to adjust the particle size of the bridge plugging material, and to use long fiber and thixotropic cement slurry for plugging. Although the difficulty and investment of the plugging process are increased, it still cannot be well adapted to the complexity of the leakage ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/46E21B33/12
CPCC09K8/46C09K2208/08E21B33/12
Inventor 杨振杰马成云王晓军武星星高晓荣梅露强
Owner XI'AN PETROLEUM UNIVERSITY
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