A hybrid temporary plugging volume fracturing method suitable for deep shale gas horizontal wells
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A volume fracturing and horizontal well technology, applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc.
Active Publication Date: 2019-03-29
ORIENT BAOLIN TECH DEV BEIJING
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[0005] According to field data and experience, it is judged that the causes of casing deformation are complex and numerous, and the well conditions after casing deformation are also different. The emergence of this problem has seriously affected the fracturing process of shale gas horizontal wells, but the fracturing As a necessary condition and effective measure for shale gas wells to obtain effective productivity, it is necessary to effectively and uniformly stimulate the deformed section as much as possible to ensure the effect of fracturing, especially to meet the volume fracturing of deep shale gas horizontal wells with a vertical depth of 3500m or more. Therefore, it is urgent to design a new mixed temporary plugging volume fracturing method suitable for deep shale gas horizontal wells, so as to ensure the successful improvement of shale gas reservoir fracturing stimulation operation effect, improve gas well productivity and recovery, and further Accelerate the process of shale gas extraction
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Embodiment 1
[0123] This embodiment provides a mixed temporary plugging volume fracturing system suitable for deep shale gas horizontal wells, which includes: multiple sets of liquid tanks, main sand mixing trucks, auxiliary sand mixing trucks, sand tanks, and multiple fracturing trucks , hydraulic valve 1 and second hydraulic valve 2;
[0124] Wherein, the multiple groups of liquid tanks (10 groups) are respectively connected with the main sand mixing vehicle and the auxiliary sand mixing vehicle through liquid supply pipelines;
[0125] The sand tank is connected to the mixing tank of the main sand mixing vehicle through pipelines;
[0126] The outlet of the auxiliary sand mixer is connected to the first high-pressure manifold through the hose line and the plug valve, and the first high-pressure manifold is then connected to the wellhead;
[0127] The outlet of the main sand mixing truck is connected to the inlets of multiple fracturing trucks through the low-pressure manifold, and the ...
Embodiment 2
[0130] This example provides a mixed temporary plugging volume fracturing method suitable for deep shale gas horizontal wells, the process flow chart is as follows figure 1 Shown:
[0131] In order to facilitate the adjustment of on-site construction plan, ensure the effect of fracturing operation, intuitively analyze the effect of fracturing operation, and facilitate the analysis of fracturing effect in the later stage, it is necessary to use micro-seismic equipment to monitor the timing and timing of micro-seismic event points generated during fracturing construction in real time. Distribution.
[0132] From figure 2 As can be seen in the figure, the acid tank is a tank used to store the configured hydrochloric acid solution. Usually, before the fracturing operation, hydrochloric acid soaking is carried out in the blast hole of the casing variable well section and the whole wellbore near the wellbore area. The acid liquid is exported from the acid tank, enters the fractur...
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Abstract
The invention provides a hybrid temporary plugging volume fracturing method suitable for a deep shale gas horizontal well. The method comprises the following steps that 1, wiper trip and well washing operation is conducted on a horizontal well subjected to suspected casing deformation, whether the horizontal well is subjected to casing deformation or not is determined, and if yes, the casing deformation position and length are further determined; 2, after the casing deformation position is determined, perforation position and parameters are determined according to geology and well logging parameters; 3, a perforating gun type and a perforation mode are determined according to the wiper trip condition; 4, the size of construction is determined according to the casing deformation section length and the perforation number; 5, a treatment mode of a fractured section is determined according to different well conditions after casing deformation occurs; 6, on the basis of the perforating gun type, temporary plugging diversion fracturing operation is implemented in a perforation hole and section or a fracturing effective flow channel within the fracture through a hybrid temporary plugging volume fracturing temporary plugging diversion technology, and the overall transformation volume is increased.
Description
technical field [0001] The invention relates to the technical field of unconventional oil and natural gas stimulation, in particular to a hybrid (MCP) temporary plugging volume fracturing method suitable for deep shale gas horizontal wells. Background technique [0002] Shale gas reservoir is a typical unconventional natural gas reservoir with low permeability and low porosity. This resource occupies a large proportion of my country's oil and gas resources, but its geological conditions are special, and its development cost is high and difficult. At the same time, in order to solve the problem of operation efficiency and reduce the operation cost, the domestic field has turned the well site or platform into a factory operation, and regards drilling, cementing, perforation, multi-stage fracturing and other constructions as each process on the assembly line. Completing the drilling, completion and production of multiple wells on the same well site can greatly improve the utiliza...
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