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Whole-course temporary blocking and fracturing method and application thereof

A fracturing, full-process technology, applied in the field of petroleum fracturing, can solve the problems of complex reconstruction process and tools, low operation efficiency, high construction risk, etc., and achieve the effect of technological advancement and obvious advantages

Active Publication Date: 2016-08-17
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of existing horizontal well multi-stage reconstruction techniques and tools, high construction risk and low operation efficiency, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a whole-process temporary plugging fracturing method, including fracturing and temporary plugging. During the fracturing process, temporary plugging materials in the fractures are added for full transformation. After the fracturing is completed, temporary plugging segments near the wellbore are injected. Realize temporary blocking.

[0031] The method of this embodiment is used in the fracturing construction process. During the fracturing process, temporary plugging materials in the fractures are added. The temporary plugging materials in the fractures can temporarily plug the gaps in various parts of the fractures. , run down the temporary plugging slug, and achieve temporary plugging in the near-well zone. After the temporary plugging, the fracturing of the next fracture can be carried out. After the surface reading, the setting tool is used for plugging, which simplifies the fracturing process and drilling tools, and ensures Improve the succe...

Embodiment 2

[0033] This example introduces in detail the full-process temporary plugging fracturing method used in hydraulic jet fracturing reconstruction.

[0034] The full-range temporary plugging fracturing method for hydraulic jet fracturing comprises the following steps:

[0035] Step 1: Perforate the first section, and perform fracturing after the first section is perforated. During the fracturing process, add temporary plugging materials in the fracture to fully reform. After the fracturing is completed, inject the temporary plugging section near the wellbore The plug realizes temporary blocking;

[0036] Step 2: Carry out the second stage of perforation and fracturing reconstruction in the same way as Step 1;

[0037] Step 3: By analogy, until the whole well reconstruction is completed, then close the well;

[0038] Step 4: Open the well and blowout after the temporary plugging material is degraded.

[0039] In this embodiment, the process is mainly reflected in layer-by-layer ...

Embodiment 3

[0041] This example introduces in detail the full-process temporary plugging fracturing method used in multi-stage combined pressure and flow-limited fracturing in thin interbeds.

[0042] The full-process temporary plugging fracturing method for multi-stage co-compression and flow-limited fracturing of thin interbeds includes the following steps:

[0043] Step 1: Perforating each stimulated interval;

[0044] Step 2: Firstly, the fracturing is the easiest layer to be fracturing, and the fracturing fluid selects the easiest layer to be fracturing first, and the temporary plugging material in the fracture is added during the fracturing process to fully fracturing. After the fracturing is completed, the injection near Temporary plugging is achieved with temporary plugging in the well;

[0045] Step 3: In the same way as in step 2, according to the difficulty of the reconstruction of the reconstruction interval, fracturing and reconstruction of other intervals in sequence from e...

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Abstract

The invention belongs to the field of petroleum fracturing, and particularly relates to a whole-course temporary blocking and fracturing method and application thereof. The method includes the steps of fracturing and temporary blocking. An inside-seam temporary blocking material is added for sufficient transforming in the fracturing process, after fracturing is completed, wellbore area temporary blocking slug is injected for temporary blocking, and the method is suitable for pneumatic jet fracturing transforming and thin interbed multi-section pressure-combined and flow-limited fracturing. By means of the method, the whole-course temporary blocking and fracturing is achieved through the inside-seam temporary blocking material and the wellbore area temporary blocking slug, the fracturing process and a drill are simplified, construction success rate is ensured, operation risks are reduced, transforming effect is improved, and a new concept and means are provided for horizontal well multi-section transforming.

Description

technical field [0001] The invention belongs to the field of petroleum fracturing, and in particular relates to a whole-process temporary plugging fracturing method and an application thereof. Background technique [0002] my country is rich in low-permeability, ultra-low-permeability, shale oil and gas and other unconventional oil and gas resources, but this type of oil and gas reservoirs have the characteristics of low porosity and low permeability, low natural production capacity, and poor production stability conditions. Sand fracturing. [0003] With the development of technology, in recent years, the multi-stage fracturing technology of unconventional oil and gas horizontal wells has advanced by leaps and bounds. It has become a key technology for the effective development of unconventional oil and gas reservoirs, and is leading a major change in the exploration and development of global oil and gas resources. [0004] The smooth implementation of multi-stage fracturin...

Claims

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Application Information

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IPC IPC(8): E21B43/26
CPCE21B43/261
Inventor 许洪星孙虎王祖文张冕池晓明廖乐军高红平李燕红陶长州刘欢杨燕郭艳萍纪冬冬
Owner BC P INC CHINA NAT PETROLEUM CORP
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