Determining method of amount of shale oil deposit hydrofracture propping agent

A technology for hydraulic fracturing and shale oil, which is applied in earth-moving drilling, fluid production, wellbore/well components, etc., can solve the problems of increasing the economic cost of fracturing and the unsatisfactory effect of fracturing stimulation.

Inactive Publication Date: 2013-01-09
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

At present, there is no method to determine the proppant dose according to the volume fracturing characteristics of shale reservoirs and reservoir characteristics, which leads to the blind use of large proppant doses in the volume fracturing of shale reservoirs, and the effect of fracturing stimulation is not ideal, which increases the economics of fracturing. cost

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  • Determining method of amount of shale oil deposit hydrofracture propping agent
  • Determining method of amount of shale oil deposit hydrofracture propping agent
  • Determining method of amount of shale oil deposit hydrofracture propping agent

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Embodiment Construction

[0048] Further illustrate the specific embodiment of the present invention below in conjunction with accompanying drawing and field application example, specifically as follows:

[0049] The drilling depth of a horizontal well in a shale reservoir is 1850m, the length of the horizontal section is 264.1m, and the vertical thickness is 95.7m; according to the reservoir conditions of the well, lithological characteristics, stress difference in the horizontal section, cementing quality and other factors, it is divided into 3 sections fracture( image 3 ). The target interval of fracturing is 1552.4-1816.5m, and it is planned to obtain shale oil production capacity through fracturing.

[0050] (1) According to the principle of equivalent seepage, establish a quantitative model of the relationship between the fracture network system and the propping dose (see figure 1 , figure 2 , formula 8, formula 9);

[0051] (2) Based on the reservoir fluid high-pressure physical property d...

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Abstract

The invention relates to a determining method of amount of a shale oil deposit hydrofracture propping agent. The determining method mainly comprises the following steps of: (1) establishing a quantitative model of the relationship between a net jointing system and the amount of a propping agent based on an equivalent seepage principle; (2) preferably selecting quantity, volume and a permeability rate of a high-permeability zone by utilizing a universal Eclipse software for simulation of an oil deposit value based on reservoir liquid high-pressure property data, formation pressure data, rock data and a geologic model provided by a universal Petrel software for oil deposit geologic modeling; and (3) determining the amount of the propping agent for the shale oil deposit hydrofracture construction based on the model established in step (1) according to the quantity, the volume and the permeability rate of the high-permeability zone preferably selected in step (2). With the adoption of the determining method provided by the invention, shortcomings of the prior art can be overcome; blindness on the amount of the used sectional volume fracturing propping agent in a horizontal well of shale oil deposit can be effectively solved; fracturing and yield-increasing effects can be improved; and economic cost of fracturing can be saved.

Description

technical field [0001] The invention relates to a method for determining the dosage of construction proppant for staged fracturing of horizontal wells in shale oil reservoirs in the field of petroleum engineering, so as to ensure that the in-ground proppant can effectively support the fracture network system formed by hydraulic fracturing operations, and allow the support fracture network system It becomes a high-conductivity seepage channel for crude oil to flow into the wellbore, improving the effect of fracturing and increasing production. Background technique [0002] With the continuous and in-depth development of oil and gas exploration and development, unconventional oil and gas resources such as shale oil, shale gas, tight gas, and coalbed methane have shown great potential for exploration and development, and have gradually become the highlights of global oil and gas exploration and development. my country has abundant shale oil resources, and the estimated shale oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/267E21B49/00
Inventor 郭建春苟波赵志红
Owner SOUTHWEST PETROLEUM UNIV
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