Selective water plugging method for oil well in glutenite reservoir and application thereof

A glutenite, selective technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problem of selective water plugging design method for oil wells without Kunbei glutenite oil reservoirs

Active Publication Date: 2019-01-11
PETROCHINA CO LTD
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Problems solved by technology

[0003] There is no domestic design method that can be applied to the sel

Method used

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  • Selective water plugging method for oil well in glutenite reservoir and application thereof
  • Selective water plugging method for oil well in glutenite reservoir and application thereof
  • Selective water plugging method for oil well in glutenite reservoir and application thereof

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Example Embodiment

[0052] Example

[0053] Well A in Qie 12 well area of ​​Kunbei Oilfield, Qinghai, was put into production in April 2012, with an initial daily output of 5.10 tons of fluid, 4.96 tons of daily oil, and 2.7% water cut. Before the water shutoff in May 2016, the well produced 14.5 tons of fluid per day, 1.0 tons of oil per day, and 92.8% water content. The development requires the implementation of chemical water shutoff to control water cut and increase single well production.

[0054] Selective water shutoff will be implemented from May 12 to 16, 2016. According to the design method of the present invention, the specific water blocking method is as follows:

[0055] S101, Well selection: According to the production needs of the oilfield geological development department and the production characteristics of the glutenite reservoir, select candidate wells for water plugging;

[0056] S102, agent selection preparation: According to the temperature (70℃), salinity (60000mg / L), reservoir ...

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Abstract

The invention provides a selective water plugging method for an oil well in a glutenite reservoir and an application method thereof. The water plugging method comprises the steps of selecting a candidate well for water plugging according to production requirements and production characteristics of the oil well in the glutenite reservoir; preparing a selective water plugging agent suitable for theglutenite reservoir; designing a mathematical model according to reservoir pores and/or fracture factors to calculate the dosage of the water plugging agent; designing a five-section water plugging agent slug; designing the maximum injection pressure value of water plugging according to the formation fracture pressure; designing the injection discharge capacity of the water plugging agent according to the formation permeability and injection equipment performance; and injecting the water plugging agent slug into the candidate well for construction water plugging. The method can realize safe operation, general injection, oil increasing and water decreasing, provides powerful technical support for water control and oil stabilization of horizontal wells in Kunbei oilfield, Qinghai province, and provides an example for the water plugging technology design of horizontal wells in glutenite reservoirs in China.

Description

technical field [0001] The invention belongs to the technical field of oil production engineering, and relates to a method for selectively shutting off water in sandy conglomerate oil wells and its application. Background technique [0002] The Kunbei glutenite reservoir in Qinghai is a multi-source braided river deposit with strong heterogeneity in plane, interlayer and intralayer, low natural production, rapid decline, severe water outflow, and urgent water control. Natural and artificial fractures coexist in glutenite reservoirs in northern Kunming. Fractures are both channels for oil flow and channels for water channeling. To control water and increase oil. The test data of the oil well production profile is scarce, and the water-producing layers are not clear. The oil-water layers of the horizontal wells are in the same layer, and there is no interlayer between the oil-water layers of the vertical wells. It is difficult to implement layered directional water shutoff. T...

Claims

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Application Information

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IPC IPC(8): E21B33/13C09K8/508
CPCC09K8/508E21B33/13
Inventor 李宜坤党杨斌才程关超王龙飞吕静程涛黎兴文朱秀雨崔浪
Owner PETROCHINA CO LTD
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