Method and device for evaluating fracturing fluid flowback capacity of shale staged fracturing horizontal well

A staged fracturing and fracturing fluid technology, which is applied in the directions of measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve problems that cannot guide shale development well and have no shale staged fracturing The fracturing fluid flowback ability evaluation method and device of fractured horizontal wells, etc., to achieve the effect of increasing the production of shale gas wells and improving the stimulation effect

Pending Publication Date: 2017-04-26
PETROCHINA CO LTD
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Problems solved by technology

[0005] The research on the flowback mechanism of shale staged fracturing horizontal wells is still in the exploratory stage, especially in the field of similar physical simulation methods

Method used

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  • Method and device for evaluating fracturing fluid flowback capacity of shale staged fracturing horizontal well
  • Method and device for evaluating fracturing fluid flowback capacity of shale staged fracturing horizontal well
  • Method and device for evaluating fracturing fluid flowback capacity of shale staged fracturing horizontal well

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Embodiment 1

[0049] The embodiment of the present invention provides a shale staged fracturing horizontal well fracturing fluid flowback ability evaluation method and device, the following will combine specific implementation methods, such as figure 1 The processing flow shown is described in detail, and the method includes:

[0050] Step 101: obtaining a shale core;

[0051] Specifically, several shale cores collected in the field are obtained.

[0052] Step 102: forming multiple sets of fracturing fracture networks on the shale core;

[0053]Specifically, the test should be carried out according to the status of the actual staged fracturing horizontal well in shale. At present, shale gas development mainly adopts staged multi-stage fracturing technology for horizontal wells. The entire horizontal well section is segmented through chemical isolation, mechanical isolation or special control, and the entire horizontal section is realized by stage-by-stage fracturing. remodel. Mechanical...

Embodiment 2

[0081] This embodiment provides a shale staged fracturing horizontal well fracturing fluid flowback mechanism test device, such as Figure 4 As shown, it includes a constant temperature box, a core holder, a fracturing fluid container, a gas container, a hydraulic pump, a confining pressure pump, a measuring cylinder, a flow meter, a first pressure gauge, and a second pressure gauge;

[0082] Specifically, the hydraulic pump is respectively connected to one end of the fracturing fluid container and one end of the gas container through a pipeline, and the other end of the fracturing fluid container and the other end of the gas container are connected to the first end of the core holder through a pipeline, and the core holder The second end of the holder, the measuring cylinder and the flowmeter are connected in turn through pipelines, the confining pressure pump is connected with the third end of the core holder, and the first pressure gauge and the second pressure gauge are loc...

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Abstract

The invention discloses a method and device for evaluating the fracturing fluid flowback capacity of a shale staged fracturing horizontal well and belongs to the field of shale gas development. The method includes the steps of obtaining a shale core, forming multiple groups of fracturing seam nets on the shale core, injecting gas in the shale core to obtain the gas-saturated shale core, recording the volume of the injected gas, injecting fracturing fluid in the gas-saturated shale core to obtain the fracturing fluid saturated shale core, recording the volume of the fracturing fluid, conducting flowback test on the fracturing fluid saturated shale core, recording the volume of the discharged fracturing fluid and the volume of the discharged gas, and calculating a flowback capacity evaluation index. The method can be used for the study of the fracturing fluid flowback capacity of the shale staged fracturing horizontal well through an indoor similar physical simulation method and can provide a scientific basis for improving shale reservoir fracturing and rebuilding effects and improving shale gas-well production, and formulation of a reasonable shale staged fracturing horizontal well discharge and mining system is easily achieved.

Description

technical field [0001] The invention belongs to the field of shale gas development, and in particular relates to a method and device for evaluating the flowback capacity of fracturing fluid in a shale staged fracturing horizontal well. Background technique [0002] With the continuous improvement of unconventional oil and gas exploration and development, shale gas, as a kind of unconventional natural gas resource with huge reserves, has attracted more and more attention from researchers in various countries, and is regarded as one of the main directions for oil and gas resource replacement. The formation and enrichment of shale gas are characterized by self-generation and self-storage, development of nano-pores, and large-scale dispersion of organic matter, which make shale gas occur in a variety of ways, not only containing free gas, but also containing a large amount of adsorbed gas, which leads to the flow of shale gas The mechanism is complex and the development is very ...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 李武广吴建发吴天鹏任利明李莉刘军陈满谢维扬
Owner PETROCHINA CO LTD
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