Acidification blocking remover used for removing coal-bed gas well pollution blockage
A coalbed methane well and plugging agent technology, applied in the chemical field, can solve the problems of safety and hidden dangers of acidizing plugging remover, and achieve the effects of simple and effective acidizing system, convenient storage, and strong corrosion ability
Inactive Publication Date: 2014-10-01
郭子熙
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Problems solved by technology
However, for coalbed methane wells, based on the low-cost development strategy, and the liquid form of acidizing plugging remover has more safety hazards in the process of handling and transportation, there is an urgent need for a low-cost, safe and reliable acidizing plugging remover suitable for coalbed methane wells
Method used
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Effect test
Embodiment 1
[0023] In weight percent, acidifying plugging remover:
[0024] 5.0% sulfamic acid, 4.0% ammonium bifluoride, 2.0% acetic acid, 1.0% formaldehyde, 1.5% butynediol, 1.0% ammonium chloride, and the balance is water.
Embodiment 2
[0026] In weight percent, acidifying plugging remover:
[0027] 4.0% sulfamic acid, 4.0% ammonium bifluoride, 2.0% acetic acid, 2.0% formaldehyde, 1.0% butynediol, 0.
[0028] 5% ammonium chloride, the balance is water.
Embodiment 3
[0030] In weight percent, acidifying plugging remover:
[0031] 4.0% sulfamic acid, 5.0% ammonium bifluoride, 2.0% acetic acid, 1.0% formaldehyde, 1.0% butynediol, 1.0% ammonium chloride, and the balance is water.
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The invention discloses an acidification blocking remover used for removing coal-bed gas well pollution blockage. The acidification blocking remover comprises the following components in percentage by weight: 3.0-5.0% of sulfamic acid, 3.0-5.0% of ammonium bifluoride, 0-2.0% of acetic acid, 1.0-2.0% of butynediol, 1.0-2.0% of formaldehyde, 0.5-1.0% of ammonium chloride, and the balance of water. The acid liquor disclosed by the invention is strong in corrosion ability, low in corrosion velocity; the materials are mainly solids, convenient to purchase and transport, low in cost, easy to prepare, and obvious in construction application effect, so that a purpose of unblocking and increasing yield for the coal-bed gas well is effectively achieved.
Description
technical field [0001] The invention relates to the field of chemistry, in particular to an acidification plug-removing agent for removing pollution and plugging of coalbed gas wells. Background technique [0002] China is rich in coalbed methane resources, and the amount of coalbed methane resources buried below 2,000 meters has reached 36.81 trillion cubic meters. The development of the coalbed methane industry can not only reduce the pressure of oil supply and supplement the shortage of long-term conventional natural gas resources, but also effectively improve the safety conditions of coal mine production and protect the atmospheric environment, which has a major national demand. In recent years, various domestic units have increased investment in the coalbed methane industry, and the state has also given policy support, but the gas production of coalbed methane wells is far lower than expected. Among them, coal seam and wellbore blockage is one of the main reasons ...
Claims
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Login to View More IPC IPC(8): C09K8/528
CPCC09K8/528
Inventor 郭子熙曾晓慧许雷陶礡柯西军李曙光薛玲
Owner 郭子熙
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