Method for liquid drainage and gas recovery by adopting foam water drainage agent composition
A liquid drainage gas recovery and composition technology, which is applied to drilling compositions, chemical instruments and methods, and production fluids, etc., can solve problems such as stop blowout, gas well production reduction, etc., and achieve good technical effects and good acid resistance effects
Active Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is that the existing sour gas wells have too much liquid in the development process, which leads to the production reduction or even the stop of the gas well. A kind of sour gas well adopts the method of water drainage and gas recovery of foam drainage agent composition, which is used for drainage and gas recovery of gas wells, can carry liquid efficiently, and has good acid resistance, foaming performance and liquid carrying capacity
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0032] Under normal temperature and pressure, weigh alkylamine, long-chain polyether nitrogen-containing compound, and nano silicon dioxide are respectively dissolved in pH 3, 5, and 7 aqueous solution according to the mass ratio of 1:2:1, and are prepared into 1.0wt% solution to obtain the foam discharge agent composition HF-1. The composition structure is shown in Table 1.
Embodiment 2
[0034] Under normal temperature and pressure, weigh alkylamine, long-chain polyether nitrogen-containing compound, and nano silicon dioxide are respectively dissolved in pH 3, 5, and 7 aqueous solutions according to the mass ratio of 1:10:5, and are prepared into 1.0wt% solution to obtain the foam discharge agent composition HF-2. The composition structure is shown in Table 1.
Embodiment 3
[0036] Under normal temperature and pressure, weigh alkylamine, long-chain polyether nitrogen-containing compound, and nano-silica according to the mass ratio of 1:0.2:0.5 and dissolve them in pH 3, 5, and 7 aqueous solutions respectively, and prepare 1.0wt% solution to obtain the foam discharge agent composition HF-3. The composition structure is shown in Table 1.
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The invention relates to a method for liquid drainage and gas recovery by adopting a foam water drainage agent composition. The problem that an existing acidic gas well has excessive accumulated liquid in the development process, and thus gas well production reduction and even blowout stopping are caused is mainly solved. The problem is solved well by adopting the technical scheme that the methodfor liquid drainage and gas recovery comprises the following steps: (1) the foam water drainage agent composition or a foam water drainage agent composition solution is put into the oil-containing gaswell; and (2) the foam water drainage agent composition or the foam water drainage agent composition solution makes full contact with gas and water or an oil and water mixture in the oil-containing gas well to form a foam fluid, and then the foam fluid is lifted up to the ground, wherein the foam water drainage agent composition is prepared from the following components in parts by mass: 1 part of alkylamine with the general molecular formula shown as the formula (I) (please see the specifications for the formula (I)), 0.1-50 parts of a long chain polyether nitrogen-containing compound with the general molecular formula shown as the formula (II) (please see the specifications for the formula (II)), and 0-10 parts of nanoparticles. The method can be used for the water drainage and gas recovery industry of the gas well.
Description
technical field [0001] The invention relates to a method for liquid drainage and gas recovery using a foam drainage agent composition, in particular to a method for acid gas wells using a foam drainage agent composition for drainage and gas recovery. Background technique [0002] With the intensification of gas field exploitation, water production from gas fields has become a key issue restricting the normal production of gas wells. Foam drainage gas recovery is a drainage gas recovery technology developed rapidly at home and abroad in recent years. It has the advantages of simple equipment, convenient construction, low cost, wide range of applicable well depths, and does not affect the normal production of gas wells. Foam drainage is to inject a foaming agent into the well through the tubing or tubing annulus, and generate foam with certain stability under the agitation of the air flow. The liquid phase deposited by slippage in the pipe turns into foam, which changes the r...
Claims
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Login to View More IPC IPC(8): C09K8/588E21B43/22
CPCC09K8/588C09K2208/10E21B43/16
Inventor 何秀娟裘鋆马俊伟吴国英
Owner CHINA PETROLEUM & CHEM CORP