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A method for measuring formation water production rate

A formation water and formation technology, which is applied in the fields of earthwork drilling, wellbore/well components, etc., can solve the problem that formation evaluation cannot play a role in the exploration stage, and achieve the effect of high efficiency, accurate measurement results and low cost

Active Publication Date: 2017-06-30
CHINA NAT OFFSHORE OIL CORP +1
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  • Application Information

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Problems solved by technology

However, the evaluation of the formation water production rate in the production stage mainly refers to the evaluation of the development of the oilfield, and it cannot play a role in the evaluation of the formation in the exploration stage.

Method used

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  • A method for measuring formation water production rate
  • A method for measuring formation water production rate
  • A method for measuring formation water production rate

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Embodiment Construction

[0030] In an offshore oilfield, at 1993.5m downhole with a cable formation sampler, the formation characteristic logging tool RCI (Reservoir Characterization Instrument) was used for pressure measurement and sampling. After pumping for 197.8min, the pump pumped out a fluid volume of 42500.00mL, and then began to collect the required Samples were collected and separated to obtain 700mL of oil samples under ground conditions and 100mL of water samples under ground conditions. The mud filtrate sample is obtained from the mud obtained at the wellhead after the wellbore mud is circulated during the well logging process, and is filtered through a filter press (Fann17023 type). A 100 mL sample of the mud filtrate was collected.

[0031] The volume coefficient of the oil sample obtained by using the QUAD PVT instrument is 1.2, and the volume of the oil sample under the formation conditions is calculated to be 700×1.2=840mL.

[0032] The potassium ion concentration of the water sample...

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Abstract

The invention relates to a method for quantificationally measuring the stratum water producing rate. The method comprises the following steps that stratum sampling samples and slurry filter liquid samples are collected; the stratum sampling samples comprises crude oil, stratum water and slurry filter liquid, oil type samples and water type samples are obtained after the stratum sampling samples are separated, and the water type samples comprise stratum water and slurry filter liquid; the volume of the obtained oil type samples is the volume of the oil type samples under the ground condition, and the volume of the obtained water type samples is the volume of the water type samples under the ground condition; the volume factor of the oil type samples is obtained, the volume factor of the oil type samples is multiplied by the volume of the oil type samples under the ground condition, and the volume of the oil type samples under the stratum condition can be obtained; the volume of the stratum water in the water type samples is calculated on the basis of the concentration of K<+> in the slurry filter liquid samples and the concentration of K<+> in the water type samples; the volume factor of the stratum layer is obtained, the volume factor of the stratum water is multiplied with the volume of the stratum water in the water type samples, and the volume of the stratum water under the stratum condition is obtained; and the stratum water producing rate is obtained.

Description

technical field [0001] The present invention relates to a method of measuring formation water production rate, and is especially used in the stage of prospecting and logging. Background technique [0002] There are mainly two methods for evaluating the formation water production rate in the prior art: one is to rely on drill pipe midway test (DST) technology in the exploration stage; the other is to rely on production logging technology to measure the formation fluid produced by the wellhead in the production stage. To qualitatively identify formation fluid properties and quantitatively evaluate formation water production rate. [0003] Drill pipe midway test technology is a general term for the open hole test of the drilled formation during the drilling process or the test of the formation after the completion of the well. Use a drill string or tubing string to lower the formation tester to the layer to be tested, and through the control of ground auxiliary equipment, make...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 杨玉卿刘海波郭书生刘海涅高永德李扬
Owner CHINA NAT OFFSHORE OIL CORP
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