Yield increasing device and method for heavy oil well

A technology for oil wells and feeding sections, which is applied to the components of pumping devices for elastic fluids, earthwork drilling, wellbore/well components, etc., and can solve problems such as high cost of use, seepage breakthrough, and small swept volume. Achieve the effects of improving flow performance, reducing crude oil fluidity, strengthening water control and reducing viscosity

Active Publication Date: 2021-06-29
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the viscosity reducer is a liquid fluid, it is injected into the oil well alone, and after entering the formation, it is very easy to seepage breakthrough in a single direction in the liquid phase, and the small pores are not effective. The rate is low and the cost of use is extremely high, so it is not suitable for on-site promotion

Method used

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  • Yield increasing device and method for heavy oil well
  • Yield increasing device and method for heavy oil well
  • Yield increasing device and method for heavy oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment provides a stimulation device for heavy oil wells, such as figure 1 As shown, the production increasing device includes a material inlet a, a channel b and a material outlet c arranged in sequence;

[0063] The channel b includes a transition section b1 and a helical section b2 arranged in sequence;

[0064] The transition section b1 is a first tapered structure, taking the material flow direction as a reference;

[0065] The spiral section b2 is a spiral chute structure;

[0066] The end point of the spiral chute structure is provided with an impeller, taking the material flow direction as a reference.

[0067] The lateral inclination angle of the spiral chute structure is 20°;

[0068] The pitch of the spiral chute structure is 24mm.

Embodiment 2

[0070] This embodiment provides a stimulation device for heavy oil wells, the stimulation device includes a material inlet a, a channel b, and a material outlet c arranged in sequence;

[0071] The material inlet a includes a first feed section a1 and a second feed section a2; the diameter of the first feed section a1 is 80mm; the length of the first feed section a1 is 88mm;

[0072] The second feed section a2 is a second tapered structure, with the material flow direction as a reference; the diameter of the large end of the second tapered structure is equal to the diameter of the first feed section a1; the second tapered structure The diameter of the small end of the structure is equal to the diameter of the large end of the first tapered structure; the length of the second feed section a2 is 30mm; the diameter of the small end of the second tapered structure is 40mm;

[0073] The passage b includes a transition section b1 and a helical section b2 arranged in sequence; the le...

Embodiment 3

[0081] This embodiment provides a production stimulation method for heavy oil wells, which mainly consists of seven steps: wellbore hot washing, pre-construction preparation, injection process connection and pressure test, nitrogen and viscosity reducer injection, displacement injection, brine, and production.

[0082] (1) Hot washing of the operating wellbore: After backwashing, the wellbore string is lifted up to be the injection string.

[0083] (2) Construction preparation: Prepare corresponding construction equipment and materials.

[0084] (3) Injection process connection and pressure test: connect ground equipment and pipeline injection process and conduct pressure test, if the ground pressure test fails, rectification is required.

[0085] (4) Mixed injection of nitrogen and viscosity reducer: After the surface equipment and injection process pass the pressure test, start the nitrogen production nitrogen injection equipment to inject nitrogen, and the viscosity reducer...

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Abstract

The invention relates to a yield increasing device and method for a heavy oil well. The yield increasing device comprises a material inlet, a channel and a material outlet which are sequentially arranged; the channel comprises a transition section and a spiral section which are arranged in sequence; the transition section is of a first gradually-shrinking structure; the spiral section is of a spiral chute structure; and an impeller is arranged at the end point of the spiral chute structure. After a viscosity reducer stock solution or diluent and nitrogen are mixed on the ground according to a certain proportion, a viscosity reducer is uniformly dispersed in the nitrogen after flowing through the yield increasing device, and after entering a reservoir, the viscosity reducer is large in swept volume, is large in effective range and makes full contact with crude oil in the reservoir to fully reduce viscosity, gaseous nitrogen is insoluble in formation water to form inelastic displacement, formation water in the immediate vicinity of a wellbore can be pushed away, a better seepage channel is provided for formation oil, and thus the effects of controlling water and increasing oil are achieved.

Description

technical field [0001] The invention relates to the petroleum field, in particular to a production stimulation device and method for heavy oil wells. Background technique [0002] Affected by the high mobility ratio of heavy oil and formation water, once water invasion occurs in a heavy oil well, the water production of the oil well will suddenly increase and the oil production will drop significantly, which seriously restricts the production effect of the oil well. The core problem is to control water and reduce the oil-water mobility ratio. Water delays and blocks the flow of formation water to the wellbore. The key to reducing the oil-water mobility ratio is to reduce the viscosity of crude oil. The reduced viscosity of crude oil is also more conducive to water control. The two complement each other. [0003] Such as CN205189846U, a kind of heavy oil well adding viscosity reducing agent device, comprising: medicament tank, liquid outlet valve, filter, vent valve, pipeline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D7/00F04D3/02F04D29/18F04D29/52E21B43/16E21B43/22
CPCF04D7/00F04D3/02F04D29/181F04D29/185F04D29/528E21B43/166
Inventor 吴捷高玮李壮刘国华田华伍晓妮王涛彭会新董家峰冯汝强张昕冉陈昌永曹蕾李洋李志李鹏霍爱莉刘波宫鹏骐冯光冯国强王渝瑄何璐璐
Owner BC P INC CHINA NAT PETROLEUM CORP
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