Water-containing thickened oil PVT experiment method

An experimental method and heavy oil technology, applied in the direction of weighing, measuring devices, instruments, etc. by removing certain components, can solve the problems of high water content and high water content that cannot be analyzed experimentally, and achieve small and uniform density difference stable effect

Inactive Publication Date: 2015-07-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If this specification is fully followed, a large number of oil wells will give up sampling due to high water cut, and even if samples are obtained, they will not be able to perform experimental analysis due to high water cut

Method used

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  • Water-containing thickened oil PVT experiment method
  • Water-containing thickened oil PVT experiment method
  • Water-containing thickened oil PVT experiment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1. A water-containing heavy oil PVT experimental method comprises the following steps:

[0045] Step 1: Sample Preparation

[0046] like figure 1 shown. For shallow water-bearing heavy oil samples, at the sampling temperature, pressurize the water-bearing formation heavy oil samples to the formation pressure where the water-bearing formation heavy oil samples were taken at the time of sampling, and shake them well until the pressure no longer drops. At this time, the sample saturation process After completion, a single-phase formation fluid sample is formed; the single-phase fluid sample is transferred into a PVT analysis container; the above-mentioned single-phase formation fluid sample is transferred into a PVT analysis container;

[0047] The sample preparation is completed in the PVT analysis container 2, and the PVT analysis container 2 is placed in the heat preservation device. The inlet and outlet of the PVT analysis container 2 are provided with valve...

Embodiment 2

[0076] Example 2. A water-containing heavy oil PVT experimental method comprises the following steps:

[0077] Step 1: Sample Preparation

[0078] like figure 1 shown. For the water-bearing heavy oil samples in the middle and deep formations, at 100°C, pressurize the water-bearing formation heavy oil samples to the formation pressure where the water-bearing formation heavy oil samples were taken when sampling, and shake them well until the pressure no longer drops. At this time, the sample saturation process After completion, a single-phase formation fluid sample is formed; the single-phase fluid sample is transferred into a PVT analysis container; the above-mentioned single-phase formation fluid sample is transferred into a PVT analysis container;

[0079] The sample preparation is completed in the PVT analysis container 2, and the PVT analysis container 2 is placed in the heat preservation device. The inlet and outlet of the PVT analysis container 2 are provided with valv...

Embodiment 3

[0111] Example 3. A water-containing heavy oil PVT experimental method comprises the following steps:

[0112] Step 1: Sample Preparation

[0113] like figure 1 shown. At the formation temperature where the sample was taken (according to the formation temperature measured at the time of sampling), pressurize the heavy oil sample from the water-bearing formation to the formation pressure where the heavy oil sample from the water-bearing formation was taken when sampling, and shake it well until the pressure no longer drops , when the sample saturation process is completed, a single-phase formation fluid sample is formed; the single-phase formation fluid sample is transferred into the PVT analysis container; the above-mentioned single-phase formation fluid sample is transferred into the PVT analysis container;

[0114] The sample preparation is completed in the PVT analysis container 2, and the PVT analysis container 2 is placed in the heat preservation device. The inlet and ...

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Abstract

The invention discloses a water-containing thickened oil PVT experiment method. The method comprises the following steps of carrying out physical property analysis on water-containing emulsified oil, respectively metering a volume and quality of water-containing stratum thickened oil by conventional methods, releasing all the water-containing thickened oil into an atmospheric environment, carrying out water content determination on the crude oil, carrying out oil-water separation, determining oil and water density and calculating real physical property parameters of the stratum crude oil according to a derived formula. The method realizes analysis of thickened oil with water content more than 5% and realizes accurate sampling and analysis on high-water content thickened oil well. The method is suitable for water-containing thickened oil and ultra-thick oil.

Description

technical field [0001] The invention relates to a test method for physical property experiments of water-bearing formation fluids, in particular to a PVT test method for water-bearing heavy oil. Background technique [0002] Oil well formation fluid sampling has strict requirements on water cut, and oil (gas) wells that do not produce water or have a water production rate of no more than 5% should be selected first. Excessive water content has a great influence on the experimental results. However, the oilfield has entered the middle and late stages of development. Taking Shengli Oilfield as an example, it is in the stage of high water cut as a whole, and the water content of formation fluids has increased greatly. Taking low permeability reservoirs as an example, the comprehensive water cut of the new area has reached 68.3%. If this specification is fully followed, a large number of oil wells will give up sampling due to high water cut, and even if samples are obtained, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/00G01N5/04G01N9/00G01N9/36
Inventor 顾辉亮李其朋李友全王汝磊岳小华李凤鸣王明郑文龙张勇高绍琨张金柱
Owner CHINA PETROLEUM & CHEM CORP
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