Well completion method with reservoir protection and packing functions

A reservoir and functional technology, applied in the field of completion methods with the function of protecting reservoir isolation, can solve problems such as pressure penetration, exceeding the reservoir, and many processes, so as to improve the absorption capacity and seepage capacity, and protect the isolation function , high economic benefits

Active Publication Date: 2016-11-09
陕西城鸿实业有限公司 +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned reservoir stimulation measures will bring two problems: the first is the pressure penetration and the dissolved cement sheath; the second is that the artificial fractures generated in the near-wellbore area will exceed the reservoir and extend to other intervals above and below the reservoir
There are many disadvantages in methods such as swabbing, gas lift, and oil well pumping. One is that it is matched with oil testing, workover and oil production, and it is not within the scope of drilling engineering; the other is that the construction is completed by special equipment and special technology; Long, many processes, high cost
[0006] In the wellbore completed by casing perforation, high-energy gas fracturing has the following disadvantages: First, due to the limitation of perforation aperture, number of holes and hole density, the flow area formed by perforation is small, and it enters the re

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  • Well completion method with reservoir protection and packing functions
  • Well completion method with reservoir protection and packing functions

Examples

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Example Embodiment

[0043] Example 1:

[0044] A well completion method with reservoir protection and isolation function. Before drilling reservoir 2 and before cementing, when reservoir 2 is in an open hole state, perform at least one high-energy gas fracturing on at least one layer of reservoir 2. 2 The formation of artificial fractures near the well area includes the following steps:

[0045] Step 1: Drilling: drill through the reservoir 2 to the depth of the drilling;

[0046] Step 2: Perforation: Establish a hole with a predetermined depth in the near-well zone of reservoir 2;

[0047] Step 3: Build block: Establish a design fluid block in wellbore 1, calculate and determine high-energy gas fracturing parameters based on the fluid block involved;

[0048] Step 4: High-energy gas fracturing: perform at least one high-energy gas fracturing on at least one layer of reservoir 2 to form artificial fractures in the vicinity of the wellbore of reservoir 2;

[0049] Step 5: Cementing: forming a cement ring 12...

Example Embodiment

[0054] Example 2:

[0055] A well completion method with reservoir protection and isolation function. Drilling through reservoir 2 without drilling to the completion depth. When reservoir 2 is in an open-hole state, at least one layer of reservoir 2 should be fractured by high-energy gas. The formation of artificial fractures in the zone near the well of reservoir 2 includes the following steps:

[0056] Step 1: Drilling: Drill through reservoir 2 without drilling to the depth of completion;

[0057] Step 2: Perforation: Establish a certain depth of hole in the reservoir 2 near the well zone;

[0058] Step 3: Build block: Establish a design fluid block in wellbore 1, calculate and determine high-energy gas fracturing parameters based on the fluid block involved;

[0059] Step 4: High-energy gas fracturing: perform at least one high-energy gas fracturing on at least one layer of reservoir 2 to form artificial fractures in the vicinity of the wellbore of reservoir 2;

[0060] Step 5: Cont...

Example Embodiment

[0066] Example 3:

[0067] A well completion method with reservoir protection and isolation function. Reservoir 2 is drilled without drilling through Reservoir 2. When the drilled part of Reservoir 2 is in an open-hole state, it is implemented for reservoir 2 that has been drilled but not penetrated. At least one high-energy gas fracturing to form artificial fractures near the wellbore of reservoir 2 includes the following steps:

[0068] Step 1: Drilling: Drill through reservoir 2 without drilling through reservoir 2;

[0069] Step 2: Perforation: Establish a hole with a predetermined depth in the near-well zone of reservoir 2;

[0070] Step 3: Build block: Establish a design fluid block in wellbore 1, calculate and determine high-energy gas fracturing parameters based on the fluid block involved;

[0071] Step 4: High-energy gas fracturing: Perform at least one high-energy gas fracturing on the drilled but not drilled reservoir 2 to form artificial fractures near the well;

[0072] St...

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Abstract

The invention relates to a well completion method with reservoir protection and packing functions. The well completion method primarily comprises the following steps that 1, well drilling is conducted, specifically, each reservoir is completely drilled through to the total depth or the reservoir is completely drilled through without reaching the total depth or the reservoir is incompletely drilled through; 2, well logging is conducted; 3, open hole perforation is conducted; 4, a barrier is built, specifically, the liquid barrier is built and designed in a well; 5, high-energy gas fracture is carried out, specifically, high-energy gas fracture is carried out on at least one reservoir one time, and artificial cracks are formed; 6, if each reservoir is completely drilled through without reaching the total depth or the reservoir is incompletely drilled through in the step 1, drilling continues till the total depth is reached; 7, well cementation is conducted, specifically, a cement ring is formed in the annular space between a casing pipe of each reservoir and the well; 8, casing pipe perforation is conducted, specifically, a duct between each reservoir and a shaft is built; and 9, the reservoirs are put into production or injection. The well completion method is short in construction period, small in number of procedures and low in cost. By means of the well completion method, the absorption and seepage capacities of the reservoirs can be greatly improved, and great economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of exploration and development of mineral resources such as petroleum, natural gas, coal bed methane, geothermal and in-situ leaching, and in particular relates to a well completion method with the function of protecting reservoir isolation. Background technique [0002] In the process of exploration and development of mineral resources such as oil, natural gas, coal bed methane, geothermal and in-situ leaching, casing perforation completion is the most extensive and most important well completion method at home and abroad. The so-called casing perforation completion is to drill through the reservoir to the completion depth, lower the reservoir casing to the bottom of the reservoir, inject cement slurry for cementing, and the cement slurry solidifies outside the reservoir casing to form a cement sheath (annular columnar Cement stone) plays the role of sealing the reservoir casing and sealing the reservoir, and then pe...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B33/13E21B43/116
CPCE21B33/13E21B43/116E21B43/255E21B43/26
Inventor 肖倩肖毅肖肖
Owner 陕西城鸿实业有限公司
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