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Layered oil production device

An oil production device and layered oil production technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of low oil reservoir reserves, oil layer pressure interference, low economic benefits, etc., and avoid interlayer Interference phenomenon, improve pump efficiency, strong practical effect

Inactive Publication Date: 2013-03-06
SHAANXI ZHONGMING ENERGY INVESTMENT
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AI Technical Summary

Problems solved by technology

[0002] Most oilfields in eastern my country have multi-layered heterogeneous structures, and there are serious interlayer interference problems when using the combined production method to recover oil. There are large-scale Sartu, Putaohua, Fuyu, and Yangdachengzi oilfields in the periphery of Daqing Oilfield. The superimposed oil-bearing areas of Heidimiao oil layer and Heidimiao oil layer, these oil layers have low reserve abundance, if they are developed separately as a set of layers, the economic benefits will be very low
However, simple combined production (lifting or full well combined pumping) has pressure interference from different oil layers in the well

Method used

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  • Layered oil production device

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Embodiment Construction

[0009] A stratified oil recovery device according to the present invention comprises a casing 1, a hollow oil pump 2 and a tubular oil pump 3 connected in series, movably arranged in the casing 1, and the hollow oil pump 2 and the tubular oil pump 3 are connected in series. 3 is fixed in the casing 1 by the packer 4, the present invention utilizes the packer 4 to divide the two oil layers in the well into two parts, the upper oil layer adopts the hollow oil pump 2 for swabbing; the lower oil layer adopts the tubular oil pump 3, In the oil pumping process, the oil is produced in layers, which avoids the problem of interference between layers, and because the stroke of the hollow oil pump 2 is greater than the stroke of the tubular oil pump 3, the two pumps will not touch the pump during the same pumping process. Phenomenon.

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Abstract

The invention discloses a layered oil production device and relates to an oil production device, particular to a layered oil production device. The layered oil production device comprises a casing pipe, wherein the oil production device is arranged inside the casing pipe and is fixed in the casing pipe through a packer. The layered oil production device is characterized in that the oil production device comprises two oil-well pumps which are vertically arranged in series. According to the layered oil production device disclosed by the invention, the upper oil-well pump and the lower oil-well pump are independently arranged by using the packer, so that the interlayer interference phenomenon is effectively avoided; and meanwhile, the efficiency of the pumps can be increased. The layered oil production device disclosed by the invention is simple in structure and stronger in practicality.

Description

technical field [0001] The invention relates to an oil recovery device, in particular to a layered oil recovery device. Background technique [0002] Most of the oilfields in eastern my country are multi-layered heterogeneous structures. When commingled production is used, there is a serious interlayer interference problem. There are a large range of Sartu, Putaohua, Fuyu and Yangdachengzi in the periphery of Daqing Oilfield. And the superimposed oil-bearing areas of the Heidimiao oil layer, the reserves of these oil layers are low, and if they are developed as a separate set of layers, the economic benefits will be very low. However, simple commingled production (extraction or full well commingling) also has pressure interference from different oil layers in the well. According to the previous relevant data, some oil layers have a low degree of production in simple commingled production, and some oil layers have not been produced yet. In order to produce oil or more oil fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/14
Inventor 王梅玫
Owner SHAANXI ZHONGMING ENERGY INVESTMENT
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