Construction method of fast dehydration curable type and organic synthesis type plugging agent compound plugging

A technology of organic synthesis and construction method, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of drill sticking, pipeline blockage, easy sedimentation and accumulation at the bottom of the slurry mixing tank, etc., and achieve the guarantee Drilling tool safety, simple construction process, and the effect of saving construction costs

Active Publication Date: 2018-02-06
CHENGDU DEDAO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to: propose a method suitable for on-site construction of plugging with fast dehydration curable plugging agent and organic synthesis plugging agent, and solve the problem of using the compound plugging agent in the prior art Problems such as easy sedimentation and accumulation at the bottom of the slurry mixing tank, blocked pipelines or stuck drills exist during the application of slurry to ensure construction safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] A leak-stopping on-site construction process suitable for compounding fast dehydration curable leak-stopping agent and organic synthetic leak-stopping agent, the steps include:

[0098] Preparatory work before construction:

[0099] 1) Prepare several recipes of drilling fluid for circulation and replacement;

[0100] 2) According to the amount of plugging slurry to be prepared, choose to clean 1 to 2 mud tanks, keep their agitators and butterfly valves in good condition, and prepare two gas pipelines;

[0101] 3) Preparation of the mud pump: It is required that the mud pump is well watered and the filter screen participating in the circulation is removed;

[0102]4) Check the power equipment and suspension system in advance to ensure normal construction;

[0103] 5) Lower the bare drill pipe used in this drilling to the casing shoe. Since the well itself is currently in the stage of lost circulation, the pump pressure and displacement during normal drilling are direc...

Embodiment 2

[0116] When this technology was applied to a well in Zigong, Sichuan, 32 to 34 parts of barite was added in the formula of step 1) in Example 1, which was added before adding the organic synthetic plugging agent, and stirred for 5 ~10 minutes; the barite powder is the barite powder described in the standard number GB / T 5005-2010. All the other are with embodiment 1.

[0117] After successful plugging, the pressure test confirmed that the equivalent density of the pressure bearing capacity of the formation was reduced from 1.62g / cm 3 Increased to 1.91g / cm 3 , reached the predetermined goal, and met the construction requirements for drilling the salt layer in the next step.

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Abstract

The invention discloses a fast-dehydrating curable and organic synthetic plugging agent compound plugging construction method. The method sequentially includes the steps of preconstruction preparation, preparation of plugging slurry, injection and squeezing of the plugging slurry, and plug sweeping after plugging. For injection and squeezing of the plugging slurry, different modes are selected to perform squeezing injection plugging according to different conditions. The method is applicable to site construction of plugging by compounding fast-dehydrating curable plugging agents and organic synthetic plugging agents, the problem that the compound plugging agent easily settles and accumulates at the bottoms of slurry forming tanks to block pipelines or jam drilling tools when used in the prior art is solved, and safety in construction is assured.

Description

technical field [0001] The present invention relates to the technical field of on-site plugging construction technology in petroleum drilling, in particular how to pump fast-losing curable plugging agents and organic synthesis plugging agents to the lost well section and ensure the safety of drilling tools when used in combination. construction process. Background technique [0002] Lost circulation is one of the most common downhole complications in the drilling process of the petroleum industry. Lost circulation will not only prolong the drilling period, but also lead to the loss of a large amount of manpower and material resources, causing damage to the reservoir, and once the lost circulation is not well controlled, it may also induce major accidents such as well collapse and blowout. Therefore, plugging materials with excellent performance, together with corresponding countermeasures and construction plans, are the basic guarantee for improving the success rate of a pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/13C09K8/46
CPCC09K8/426C09K8/46E21B33/13
Inventor 操亮操顺周翰缪娟操晶李朝奉
Owner CHENGDU DEDAO IND
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