Oil well sand washing plugging agent and plugging method

A plugging agent and sand washing technology, which is applied in the field of oil well sand flushing plugging agent and plugging, can solve the problems that affect the construction efficiency, polymer dissolution is slow, and cannot be solved quickly, achieving superior performance, high success rate, Good operability on site

Inactive Publication Date: 2006-11-08
SUNCOO PETROLEUM TECH
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  • Abstract
  • Description
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Problems solved by technology

In the process of using gel and jelly, due to the slow dissolution of conventional polymers, it generally takes a long time to prepare and needs to be prepared at the preparation station....

Method used

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Examples

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Embodiment Construction

[0016] For further disclosing the technical scheme of the present invention, the following are described in detail by the examples:

[0017] The oil well sand flushing and plugging agent of the present invention is compounded by A agent-polymer and B agent-crosslinking agent, and its compound formula has two kinds: the first kind of formula is A agent+B agent=guar gum powder or Hydroxypropyl Gum Guar Gum or Coumadin Gum Powder or Sesame Gum Powder or Hydroxypropyl-Hydroxymethyl Sesame Gum Powder or Hydroxypropyl Gum Sesame Powder: Anti-swelling Agent: Emulsifier: Industrial Oil + Organic Boron: Biological Enzyme =10~70%: 0~10%: 0.5~10%: 20~60%+30~70%: 10~60%; among them, the guar gum powder is plant rubber powder; the anti-swelling agent is KCL.NH 4 CL cationic polymer; industrial oil is white oil or diesel or kerosene.

[0018] The second formula is: A agent + B agent = latex polyacrylamide + organic boron = 30-90% + 70-10%

[0019] Among them, the latex polyacrylamide is a...

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Abstract

The oil well sand washing and plugging agent is re-compounded with component A of polymer and component B of cross-linking agent. The first recipe includes component A comprising guar gum powder, hydroxyl propyl guar gum powder, tonka bean gum powder, sesbania powder, hydroxyl propyl-hydroxyl methyl sesbania powder or hydroxyl propyl sesbania powder 10-70%, expansion preventing agent 0-10%, emulsifier 0.5-10% and industrial oil 20-60%; and component B comprising organoboron 30-70% and biological enzyme 10-60%. The second recipe includes component A of polyacrylamide latex 30-90% and component B of organoboron 10-70%. The present invention is used for oil well sand washing and plugging, and has simple construction, good operability, and high plugging effect.

Description

1. Technical field [0001] The invention relates to a sand washing technology in oil field development, in particular to an oil well sand washing plugging agent and a plugging method. 2. Background technology [0002] At present, most oil fields have reached the late stage of oil field development. In addition to high water content, sand production is also serious in oil wells. Wells with severe sand production often bury the oil layer at the bottom of the well, so that the crude oil in the oil layer cannot be recovered. At this time, it is necessary to use a cement truck to pump the carrying fluid into the tubing string to flush the sand from the casing to the ground, so as to solve the problem that the sand buries the oil layer and affects the production of the oil well. During the sand washing process, when the pressure of the liquid column in the wellbore of the oil layer is higher than the pressure of the oil layer, it will cause different degrees of workover fluid leaka...

Claims

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Application Information

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IPC IPC(8): C09K8/42
Inventor 盖海防盖天雕
Owner SUNCOO PETROLEUM TECH
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