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Drainage rate analysis method based on tackifying-type emulsion

An analysis method and rate technology, which is applied in the field of water separation rate analysis based on viscosified emulsions, can solve the problem of large resources, oil displacement systems that cannot meet the requirements of enhanced oil recovery for ultra-high temperature reservoirs, and difficult recovery rates for conventional water flooding. and other problems, to achieve the effect of good effect, low cost and simple test steps

Inactive Publication Date: 2018-02-06
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0002] The ultra-high temperature oil reservoirs above 95°C have a large amount of resources. At present, such oil reservoirs have gradually entered the development stage of high water cut and high recovery degree. Conventional water flooding is difficult to further improve the recovery rate. It is determined that the conventional polymer flooding technology is difficult to adapt to the ultra-high temperature reservoir conditions above 95 °C, and the existing oil displacement system cannot meet the needs of greatly improving the recovery of ultra-high temperature reservoirs. chemical flooding technology

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  • Drainage rate analysis method based on tackifying-type emulsion
  • Drainage rate analysis method based on tackifying-type emulsion
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[0020] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0021] Such as figure 1 as shown, figure 1 It is a flow chart of a specific embodiment of the viscosity-increasing emulsion water separation rate analysis method of the present invention.

[0022] In step 101, samples of water and crude oil injected into the target block are taken for future use.

[0023] In step 102, the surfactant is added into the on-site injection water according to a certain proportion, and stirred evenly to prepare a surfactant solution. The content of the surfactant in the surfactant solution is (1.0-2.0)%.

[0024] In step 103, the crude oil sample is added to the surfactant solution in a certain proportion in the high-temperature resistant screw-top graduated test tube; the mixing ratio of the crude oil sample and the surfa...

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Abstract

The invention provides a drainage rate analysis method based on tackifying-type emulsion. The drainage rate analysis method comprises the following steps: step 1: adding a surfactant into in-situ injection water according to a given ratio, and uniformly stirring to obtain a surfactant solution; step 2: adding a crude oil sample into the surfactant solution according to a given ratio; step 3: sealing, and placing into a constant-temperature box and keeping at constant temperature for a given time; step 4: taking out from the constant-temperature box, then placing in a rotary culture device, rotating and uniformly mixing, standing at constant temperature in the constant-temperature box for a given time, and reading a volume of the precipitated water phase; step 5: calculating the drainage rate according to the volume of the precipitation water phase in a scale test tube and the standing time. The drainage rate analysis method based on the tackifying-type emulsion intuitively, rapidly andconveniently evaluates the stability of water-in-oil emulsion formed by solubilizing a water phase into the oil phase under the effect of the surfactant; moreover, the test step is simple, the cost is low, the effect is good, and the technical support is provided for screening and evaluating an emulsion surfactant oil displacement system.

Description

technical field [0001] The invention relates to the technical field of oil field exploitation, in particular to a method for analyzing the water separation rate of a viscosified emulsion. Background technique [0002] The ultra-high temperature oil reservoirs above 95°C have a large amount of resources. At present, such oil reservoirs have gradually entered the development stage of high water cut and high recovery degree. Conventional water flooding is difficult to further improve the recovery rate. It is determined that the conventional polymer flooding technology is difficult to adapt to the ultra-high temperature reservoir conditions above 95 °C, and the existing oil displacement system cannot meet the needs of greatly improving the recovery of ultra-high temperature reservoirs. Chemical flooding technology. [0003] Emulsion surfactant oil flooding technology is a brand-new chemical oil flooding method. With its special physical and chemical properties, the emulsion sys...

Claims

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Application Information

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IPC IPC(8): G01N13/00C09K8/584
CPCC09K8/584G01N13/00
Inventor 曹绪龙宋新旺郭兰磊马宝东程玉桥周敏张继超张书栋严兰徐辉汤战宏张文张林彦丁玉娟李菲菲赵方剑
Owner CHINA PETROLEUM & CHEM CORP
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