CN103046919A

CN103046919A - Method for measuring oil well products through liquid levels and differential pressure

Info

Publication number: CN103046919A
Application number: CN 201110307806
Authority: CN
Inventors: 谢涛; 胡远飞; 陈爱民
Original assignee: 陈爱民
Priority date: 2011-10-12
Filing date: 2011-10-12
Publication date: 2013-04-17

Abstract

During oil exploitation, oil well products are difficult to quantify. Products are separated into a separate oil phase, a separate aqueous phase and a separate gaseous phase by a large separating device, then two groups of liquid flow meters are used for measuring the oil phase flow and the aqueous phase flow respectively, and a group of gaseous phase flow meters are used for measuring the gaseous phase flow. This type of methods have the disadvantages of being large in used device size, a lot in staff, high in fault rate and expensive in expense and are only used in individual major oil wells. The invention provides an oil well product measuring method which is simple and easy to implement and convenient to use. The method comprises that a cylindrical device is in series connection with an oil well output pipeline, and oil well products pass through a measuring cavity inside the device when flowing through the cylindrical device. A differential pressure sensor and a liquid level sensor measure oil well products uninterruptedly and obtain parameters such as the differential pressure, liquid levels, temperatures and the pressure of oil well products inside the measuring cavity at any time. A control circuit calculates the differential pressure and liquid levels of oil well products to obtain the mass flow rate of oil, the mass flow rate of water and the water content.

Description

Method with liquid level and difference gauge gauging well output object

Technical field:

The invention belongs to technical field of petroleum extraction

Background technology:

In the oil exploitation process, output content from oil well matter is crude oil, sewage, natural gas and a small amount of silt particle etc.Because each oil field geologic situation is different, the physical difference of output object is large, the quantification means that meet output content from oil well are considerably less.After with large-scale separator output object being separated into independent oil phase, water, gas phase, measure respectively oil phase, water flow with two groups of fluid flowmeters, method with one group of gas phase flow rate meter metering gas phase flow rate can solve some problems, but separator and the large quantity of corollary equipment volume are many, the complex operation equipment management personnel is many, accident rate is high, cause somewhat expensive, stripper well can't bear, and can only use at indivedual barrelers.

Summary of the invention:

The invention provides a kind of simple, easy capable, easy to use output content from oil well method of measurement;

The method is cylinder-shaped device of serial connection in oil well output pipeline, stagnant sap cavity, measurement chamber, exhaust chamber is arranged, stagnate liquid valve, tapping valve, liquid level sensor, differential pressure pick-up in the device, and supporting have pressure sensor, temperature pick up and a control circuit etc.;

Output content from oil well is flowed through in the cylinder unit process, needs through the measurement chamber in the device.Differential pressure pick-up, liquid level sensor carry out continual measurement to the output content from oil well in the measurement chamber, obtain at any time differential pressure, liquid level and temperature, the pressure and other parameters of output content from oil well in the measurement chamber;

Control circuit is by the density p of known conditions oil _Oil, water density p _Water, measurement chamber floor space S, the weight parameter under this liquid level that the liquid level parameter that measures in conjunction with liquid level sensor and differential pressure pick-up measure obtains the volume V of output content from oil well in the measurement chamber _Survey, oil volume V _Oil, water volume V _Water, oil quality, quality and the moisture content of water.

When control circuit by differential pressure, liquid level, temperature, pressure and other parameters, the time that obtains the up stroke of oil pumper operation and down stroke is chosen in automatically closes tapping valve during down stroke is not opened the tapping valve of measurement chamber, up stroke production fluid during the production fluid; The sap cavity that stagnates in the device, the liquid valve that stagnates can be simplified.

Isolated gaseous substance is sent from the gas outlet on cylinder unit top in the output content from oil well, installs gas meter in gas exhaust piping additional, and metering gas flow parameter when not needing to measure, can not fill gas meter;

Description of drawings:

Fig. 1, cylinder-shaped device schematic diagram

Fig. 2, cylinder-shaped device structural representation

As shown in Figure 1, inlet (A), gas outlet (B), liquid outlet, (C) measurement chamber liquid outlet (D), exhaust chamber inlet (E), liquid level sensor (8), urceolus (10), tapping valve (11), gas meter (12), control circuit (13) pressure sensor (14) temperature pick up (15).

As shown in Figure 2, inlet (A), gas outlet (B), liquid outlet (C), measurement chamber liquid outlet (D), exhaust chamber inlet (E), loam cake (1), sap cavity (2) stagnates, measurement chamber (3), communicating pipe (4), differential pressure pick-up (5), exhaust chamber (6), lower cover (7), liquid level sensor (8), liquid valve (9) stagnates, urceolus (10), tapping valve (11), gas meter (12), control circuit (13), pressure sensor (14), temperature pick up (15).

The specific embodiment:

Output content from oil well, be detained stagnate sap cavity (2), top through pipe flow will to inlet (A), the sap cavity (2) that flow into to stagnate, mode gas phase output object by Gravity Separation, after gas meter (12), metering, enter exhaust chamber (6), gas meter is sent to control circuit with measurement parameter, obtains flow, density, the pressure and other parameters of gas phase output object.The liquid phase output object through the liquid valve (9) that stagnates, flow into measurement chamber (3), differential pressure pick-up (5), liquid level sensor (8), the liquid phase output object that enters in the measurement chamber measured, measure complete after, control circuit with tapping valve (11), open, the liquid phase output object in the measurement chamber through tapping valve enter exhaust chamber (6), by liquid outlet (C), discharge.

Claims

1. use the method for liquid level and difference gauge gauging well output object, it is characterized in that in oil well output pipeline cylinder unit of serial connection, stagnant sap cavity, measurement chamber, exhaust chamber, the liquid valve that stagnates, tapping valve, liquid level sensor, differential pressure pick-up and supporting control circuit, pressure sensor, temperature pick up etc. are arranged in the device;

Output content from oil well is flowed through in the cylinder unit process, needs through the measurement chamber in the device.Differential pressure pick-up, liquid level sensor carry out continual measurement to output content from oil well, obtain at any time differential pressure, liquid level and supporting temperature, the pressure and other parameters of output content from oil well in the measurement chamber;