A method for measuring downhole stratified production

A technology for production and downhole equipment, applied in the directions of surveying, earthmoving, wellbore/well components, etc., it can solve the problems of wire tension exceeding the maximum allowable tensile force and potential safety hazards, and achieve low wire tension, low operation risk, and detection. Efficient effect

Active Publication Date: 2022-07-15
CHINA FRANCE BOHAI GEOSERVICES
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Problems solved by technology

Due to the characteristics of long tool string and required line speed, the steel wire tension will exceed the maximum allowable tension, especially the complex well trajectory, and some wells are forced to cancel the production profile logging operation
There are security risks

Method used

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  • A method for measuring downhole stratified production
  • A method for measuring downhole stratified production
  • A method for measuring downhole stratified production

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Embodiment Construction

[0031] The present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0032] like figure 1 As shown, the method for measuring downhole layered production provided by the present invention includes:

[0033] Step 1. Close the oil well, and use the fiber optic sensor of the downhole equipment to measure the geothermal gradient curve;

[0034] Step 2: Open the well and flow, use downhole equipment optical fiber sensors and optical fiber pressure sensors to collect downhole temperature data and downhole pressure data, and transmit the collected downhole temperature data and downhole pressure data to the uphole processing equipment through the ground optical cable, and at the same time. The oil, gas and water production in steady state is measured on the ground; the temperature value demodulation formula of each point on the sensing fiber is:

[003...

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Abstract

The invention discloses a method for measuring downhole layered production, comprising: step 1: shutting down an oil well, and measuring a geothermal gradient curve by using an optical fiber sensor of downhole equipment; Collect the downhole temperature data and downhole pressure data, and transmit the collected downhole temperature data and downhole pressure data to the uphole processing equipment through the ground optical cable, and measure the oil, gas and water production in a stable state on the ground; The pressure and temperature values ​​of the downhole point nodes are calculated, and the fluid output of each layer is calculated from the temperature difference between the geothermal gradient curve and the downhole temperature data; The downhole layered oil and gas production is obtained by measuring the downhole layer temperature, the downhole geothermal gradient curve and the downhole pressure inversion calculation, realizing fixed-point measurement and high detection efficiency.

Description

technical field [0001] The invention relates to the field of oil well surveying, in particular to a method for measuring downhole layered production. Background technique [0002] The conventional technology measures the oil, gas, and water production of each layer in the downhole of the oilfield by running production logging instruments. Instruments include turbine flowmeters, density meters, water holdup / gas holdup, pressure gauges, thermometers, natural gamma and collar magnetic locators, commonly known as seven-parameter instruments. In order to reduce the influence of the start-up threshold of the flowmeter on the apparent flow rate and improve the measurement accuracy, in addition to the fixed-point measurement, four measurements on the upper and lower measurement lines of the tool string are also required. The line speed of the mine application is 10, 20, 30, and 40 m / min. In addition to the weight of the instrument tool string, additional weights are required to rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/02E21B49/00E21B47/00E21B47/06
CPCE21B47/00E21B47/06E21B49/00
Inventor 林炳南徐凤阳李跃林田立强毛敏林晓璋
Owner CHINA FRANCE BOHAI GEOSERVICES
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