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Oil well acidizing fluid containing organic phosphinic acid

A technology of oil well acidification and organic phosphonic acid, which is applied in wellbore/well components, drilling compositions, chemical instruments and methods, etc. It can solve the problems of low quartz dissolution rate, short acid action distance, and shallow acidification depth, etc. , achieve good technical effect, improve the effect of tapping potential and hard-to-recover reserves

Active Publication Date: 2007-04-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the acidification effect data is not involved in the prior art or there are problems such as high acid solution to clay dissolution rate and low quartz dissolution rate in the existing technology, so that the acid solution action distance is short and the acidification depth is shallow. , to provide a new oil well acidizing fluid containing organic phosphonic acid

Method used

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  • Oil well acidizing fluid containing organic phosphinic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Organic phosphonic acid

Embodiment 2

[0027] Organic phosphonic acid is dubbed weight concentration and is: the oil well acidizing fluid of 6% aminotrimethylene phosphonic acid+4.5% HF, test by the condition and step of embodiment 1, its result is as follows: to quartz (SiO 2 ) The dissolution rate of rock samples is 32.70%, and the dissolution rate of clay is 15.11%.

Embodiment 3

[0029] Organic phosphonic acid is made into weight concentration and is: the acidifying solution of 6% aminotrimethylene phosphonic acid+×% HF, test by the condition and step of embodiment 1, its result is as follows:

[0030]

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Abstract

The present invention relates to oil well acidifying solution of organic phosphonic acid, and aims at solving the technological problems of short acidifying solution action distance and smaller acidifying depth caused by high corrosion rate of acidifying solution on clay and low corrosion rate on quartz, etc. The technological scheme of the present invention is that amino trimethylene phosphonic acid is used as the main component of oil well acidifying solution. The present invention is used in oil extracting industry.

Description

technical field [0001] The invention relates to an oil well acidizing fluid containing organic phosphonic acid, in particular to the acidizing fluid containing organic phosphonic acid used for acidizing oil layers in crude oil exploitation. Background technique [0002] Crude oil is generally buried in deep underground oil layers, most of which are composed of sedimentary rocks. Sedimentary rocks mainly exist in two forms, sandstone and limestone. The crude oil in the sandstone oil layer is mainly stored in the pores or crevices of the rock; the crude oil in the limestone oil layer is mainly stored in the cracks or caves of the rock. As far as the world is concerned, sandstone oil reservoirs are the main storage form of crude oil. In China, sandstone deposits are the main deposits. What people usually call oil reservoirs mainly refers to sandstone oil reservoirs. [0003] Sandstone consists of rock grains (mainly composed of sio 2 ), cemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/06E21B43/27
Inventor 张卫东陈永福张磊宗弘元
Owner CHINA PETROLEUM & CHEM CORP