Novel profile control rapid degradation liquid
A quick-dissolving liquid and a new type of technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of serious damage to the formation structure, affecting the effect of oil recovery and development, and the degradation effect is not obvious, so as to achieve simple operation and increase the oil production efficiency. The effect of recovery factor
Inactive Publication Date: 2013-02-27
大庆百晟石油科技有限公司
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Problems solved by technology
[0003] Generally, with the continuous increase of cumulative injection volume of profile control fluid in oilfields, the continuous change of stratum structure pores, and the continuous sealing of large pores and high permeability layers by profile control, the scattered small oil belts have no outflow channels, seriously affecting the Oil recovery development effect
In recent years, in order to solve the above problems, ordinary fracturing and acidizing profile control and plugging removal measures have been promoted on site. Although the contradiction between the inability to inject the oil displacement agent and the increase in injection pressure has been alleviated to a certain extent, there are still problems such as insignificant degradation effect, Low efficiency and increasingly serious corrosion pollution have caused irreparable serious damage to the original structure of the formation
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] Embodiment 1: The formula of the decompression increasing injection liquid adopted is as follows:
[0023] It is composed of the following components by weight percentage: drainage aid 8.5%, hydrochloric acid 10%, hydrochloric acid corrosion inhibitor 7%, anti-swelling agent 6%, iron ion stabilizer 5%, surfactant 6%, water 57.5%.
[0024] The medicaments of the above-mentioned components are miscible with water at room temperature and can be used after being stirred evenly.
[0025] For the application effect of the formula in this case in oil and water wells, refer to the following table 2:
[0026] Table 2. The use effect of embodiment 1:
[0027]
[0028] It can be seen from the above examples that before and after degradation, the pressure and water volume indicators are very different, which proves that this formula has a good quick-dissolving effect.
[0029] Example 1: The formula of the profile-controlling quick-dissolving liquid used is as follows: it is c...
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The invention belongs to a fine chemical liquid, and relates to a novel profile control rapid degradation liquid which is used for profile control liquid chain scission rapid degradation and improves crude oil recovery. The formula is that the novel profile control rapid degradation liquid comprises, by weight, 7% to 9% of cleanup additives, 8% to 10% of hydrochloric acids, 5% to 7% of hydrochloric acid inhibiters, 4% to 6% of anti-swelling agents, 3% to 5% of ferric ion stabilizers, and the balance water. Compared with the current chemical blockage removing technologies such as common acidizing technology and the like, the rapid degradation liquid not only can improve the rapid degradation effect, is long in smoothness maintaining time, and improves the crude oil recovery, but also is a brand novel safe and environment-friendly product with the pH being 7, and the product does not have pungent odors and corrosion and damage strata.
Description
technical field [0001] The invention belongs to the liquid preparation of fine chemicals, and in particular relates to a novel profile-controlling quick-dissolving liquid used for profile control and plugging in oilfields, to open oil flow channels in new-born small oil belts, and to improve crude oil recovery. Background technique [0002] During the development and production of oil fields, a large number of chemicals are used in various processes such as drilling and oil and gas extraction, mainly minerals, natural materials, organic substances, inorganic substances, polymer materials, etc. With the injection of chemicals, the continuous movement and change of the oil zone, and the influence of many factors in the development process, the profile control and sealing layers restrict the outflow channels of crude oil. Because a large number of small oil belts are continuously produced in the downhole formation, and the original oil flow channels and seepage conditions have ...
Claims
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Login to View More IPC IPC(8): C09K8/52C09K8/58
Inventor 孙庆东赵志宽
Owner 大庆百晟石油科技有限公司