Fracturing method used for oil gas well

A technology for oil and gas wells and fracturing, which is applied in the field of fracturing of oil and gas wells, can solve the problems of high formation fracturing pressure, high requirements on fracturing equipment, and increase the cost of reservoir stimulation operations, so as to reduce fracturing pressure and reduce fracturing. The effect of cracking costs

Inactive Publication Date: 2020-03-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] This method has the following problems: after the sliding sleeve between the two packers is opened, the position of the formation fracture is the point where the formation fracture pressure is the smallest in the well interval, not necessarily the point with the richest oil reservoir, which will lead to The problem of poor effect of reservoir stimulation
Or the fracture initiation pressure of the formation is high, resulting in high requirements for fracturing equipment and increasing the cost of reservoir stimulation operations

Method used

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  • Fracturing method used for oil gas well
  • Fracturing method used for oil gas well
  • Fracturing method used for oil gas well

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] According to the present invention, a fracturing method for oil and gas wells is provided. In this fracturing method, exploration is performed to define oil and gas-rich regions within the wellbore of an oil and gas well. Then, set the fixed point within the rich area. Then, the formation fracture initiation pressure near the fixed point is reduced. Finally, fracturing fluid is pumped into the formation so that the fracturing fluid enters the formation to form fractures 300 .

[0024] In this method, the fixed point is determined first, and then the formation fracturing pressure near the fixed point is reduced before fracturing. Since the formation fracturing pressure near the fixed point is reduced, the fixed point can be used in the fracturing construction process of pumping pressure fluid in the later stage. as a cracking point. This method determines the crac...

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Abstract

The invention puts forward a fracturing method used for an oil gas well. The fracturing method comprises the following steps of: firstly, carrying out exploration to determine a fixed point in a layerrich in oil gases in a shaft; then, lowering the crack initiation pressure of a stratum near the fixed point; and pumping fracturing fluid into the stratum to form a fracture network. By use of the fracturing method, the position of a crack initiation point can be determined, the crack initiation pressure of the corresponding stratum can be lowered, and therefore, the purposes of communicating reservoir strata to a maximum degree and lowering fracturing cost can be achieved.

Description

technical field [0001] The invention relates to the technical field of downhole construction of oil and gas wells, in particular to a fracturing method for oil and gas wells. Background technique [0002] Open hole staged fracturing completion of horizontal wells is one of the important stimulation measures used in the development of low pressure and low permeability oil and gas reservoirs. In order to improve the productivity of horizontal wells, this technology adopts the completion method of open hole packers in horizontal wells, divides the horizontal section into the designed number of layers according to the geological conditions, and then uses the ball throwing method to open each ball sliding sleeve step by step to realize staged fracturing the goal of. [0003] This method has the following problems: after the sliding sleeve between the two packers is opened, the position of the formation fracture is the point where the formation fracture pressure is the smallest i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26C09K8/72
CPCC09K8/72E21B43/26
Inventor 曾义金程光明赵晨熙姚奕明戴文潮尹慧博赵建军
Owner CHINA PETROLEUM & CHEM CORP
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