Sand-preventing filling method and equipment for oil and gas well
A technology for oil and gas wells and sand control, which is used in earth-moving drilling, flushing wellbore, wellbore/well components, etc. It can solve problems such as low permeability, formation contamination, and liquid leakage, avoid pollution and damage, and reduce environmental pollution. , to ensure the effect of penetration performance
Active Publication Date: 2012-05-02
ANTON OILFIELD SERVICES (GRP) LTD
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Problems solved by technology
[0006] 4. With the rapid growth of urban gas consumption, the demand for gas consumption varies greatly with seasons, so the construction of gas storage must be more and more urgent, and the completion and filling of open-hole screens in gas storages (protective screens) and wellbore) is an effective and necessary measure. The formation pressure coefficients selected for the gas storage are relatively low, and the permeability is also relatively low. The existing filling technology cannot establish an effective circulation due to leakage, and it is difficult to achieve Filling construction
In addition, with the existing technology, a large amount of liquid will be lost into the formation, so this type of formation with low permeability cannot withstand the contamination of foreign liquids
Method used
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[0028] The present invention will be described in further detail below in conjunction with specific examples, but not as a limitation of the present invention.
[0029] The oil and gas well filling sand control method includes the following steps:
[0030] (1) Drilling, the drilled drill bit is used for the drilling of the open hole section, and the drilling gauge of the same diameter is used for the drilling of the well in the casing.
[0031] (2) Lower filling manifold, openhole screen completion filling first lowers the completion manifold, and then lowers the filling manifold; filling in the casing is directly lowered into the filling manifold. Packing manifolds include transfer strings and packing tools. The filling tools include hands-free or plug-in filling tools, that is, the transfer string and the filling tool are connected or plugged in.
[0032] (3) Well flushing, using gas or foam as the circulating medium for circulating well flushing, including cleaning the dr...
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Abstract
The invention discloses a sand-preventing filling method and equipment for an oil and gas well. In the method, gas or foam is adopted to replace a fluid to serve as a carrying medium to carry filling particles for filling. The sand-preventing filling method for the oil and gas well, disclosed by the invention, has the advantages of wide applicable range and no pollution to a stratum.
Description
technical field [0001] The invention relates to the technical field of oil and gas well sand control, in particular to an oil and gas well filling sand control method and equipment. Background technique [0002] In the production process of the oil field, some sand particles will be carried from the formation into the wellbore, which is the sand produced by the oil and gas well. Sand production in oil and gas wells is an important reason for oil and gas wells to reduce production or lie down. The hazards caused by sand production in oil and gas wells are collectively referred to as sand damage. The main hazards caused by sand production in oil and gas wells are: 1. Serious abrasion of ground and downhole equipment, even causing well jamming; 2. Dramatic increase in maintenance workload such as sand flushing, pump inspection and ground tank cleaning; 3. Sand buried oil layers or wellbore sand plugging 4. When the sand production is serious, it may even cause the well wall t...
Claims
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Login to View More IPC IPC(8): E21B43/02E21B21/14E21B43/08
Inventor 陈应淋李光银
Owner ANTON OILFIELD SERVICES (GRP) LTD