Heterogeneous profile control and flooding agent evaluation system and method based on permeability transition rock core

An evaluation system and permeability technology, which is applied in the field of evaluation system of heterogeneous phase control agent, can solve problems such as falsely high injection pressure and evaluation result errors, and achieve the effects of avoiding end face clogging, accurate evaluation results, and avoiding end face effects

Inactive Publication Date: 2020-09-29
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problems of this method are: (1) the granular heterogeneous phase-modulating agent is often blocked on the end face of the artificial core, and it is difficult to enter the core, resulting in a falsely high injection pressure, and there are large errors in the evaluation results; (2) the heterogeneous phase The control and drive agent is a heterogeneous and discontinuous system, and there are certain errors in characterizing it with parameters such as the resistance coefficient based on continuous fluid

Method used

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  • Heterogeneous profile control and flooding agent evaluation system and method based on permeability transition rock core
  • Heterogeneous profile control and flooding agent evaluation system and method based on permeability transition rock core
  • Heterogeneous profile control and flooding agent evaluation system and method based on permeability transition rock core

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Embodiment 1

[0040] like figure 1As shown in the figure, the present invention provides a heterogeneous phase displacement modifier evaluation system based on permeability transition cores, which includes: a heterogeneous phase displacement modifier supply device, a six-way valve 4, a control valve 5, and a permeability transition core 6 , measuring cylinder 7 and data acquisition and processing device. Among them, the output end of the heterogeneous phase displacement modifier supply device is connected to the injection end of the permeability transition core 6 through the six-way valve 4 and the control valve 5, and the production end of the permeability transition core 6 is connected to the measuring cylinder 7; The processing device is arranged on the six-way valve 4 and the permeability transition core 6, and is used to collect and process the pressure data at the corresponding position.

[0041] As a preferred embodiment, the heterogeneous displacement modifier supply device include...

Embodiment 2

[0052] The heterogeneous phase displacement modifier evaluation system based on the permeability transition core can realize the optimal range of permeability according to the target heterogeneous phase modifier. Specifically, it includes the following steps:

[0053] (1) Experiment preparation: According to the particle size distribution of the target heterogeneous phase modifier, a series of permeability transition cores with different permeability of the cores in the target section were made.

[0054] In order to test the preferred permeability range of the target heterogeneous phase modifier, the preparation work includes: first, use laser particle size analyzer, microscope and other instruments to test the initial and expanded particle size distribution of the target heterogeneous phase modifier, for example A laser particle size analyzer can be used to test the particle size distribution of the target heterogeneous phase modifier after aging and water expansion at the res...

Embodiment 3

[0066] The evaluation system for heterogeneous phase modifiers based on permeability transition cores can also realize the selection of suitable heterogeneous phase modifiers according to the target reservoir permeability. Specifically, it includes the following steps:

[0067] (1) According to the permeability characteristics of the target reservoir, the permeability transition cores of the same specification are made, and different heterogeneous phase modifiers are selected, and each heterogeneous phase modifier is prepared with different concentrations of dispersion system.

[0068] In order to select a suitable heterogeneous flooding agent according to the permeability of the target reservoir, the preparation work includes: making a plurality of permeability transition cores of the same specification according to the permeability characteristics of the target reservoir, and testing the porosity, porosity and permeability of the permeability transition cores Water permeabili...

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Abstract

The invention relates to a heterogeneous profile control and flooding agent evaluation system and method based on a permeability transition rock core. The system is characterized by comprising a heterogeneous profile control and flooding agent supply device, a six-way valve, a control valve, a data data acquisition and processing device, a permeability transition rock core and a measuring cylinder, wherein the permeability transition rock core comprises a transition section rock core and a target section rock core which are connected, the other end of the transition section rock core serves asan injection end of the permeability transition rock core to be connected with the control valve, the other end of the target section rock core serves as an extraction end of the permeability transition rock core to be connected with the measuring cylinder, the output end of the heterogeneous profile control and flooding agent is connected with the control valve through the six-way valve, and thedata acquisition and processing device is arranged on the six-way valve and the permeability transition rock core and is used for acquiring and processing pressure data at corresponding positions. According to the invention, the phenomenon of end face blockage in a heterogeneous profile control and flooding agent injection process can be reduced or avoided, and the optimal matching relation, conforming to the actual situation, between the heterogeneous profile control and flooding agent and the reservoir permeability can be obtained.

Description

technical field [0001] The invention relates to a system and method for evaluating a heterogeneous phase adjusting and flooding agent based on a permeability transition core, belonging to the technical field of oil and gas field development. Background technique [0002] Heterogeneous phase control and flooding technology is a deep control and flooding technology that has developed rapidly in recent years and has broad application prospects. It is widely used in water control and oil increase in high water cut oil fields. Commonly used heterogeneous phase modifiers include cross-linked polymer microspheres, self-adaptive microgels, pre-cross-linked particles or other organic and inorganic systems. Cross-linked polymer heterogeneous phase modifiers are generally synthesized on the ground with controllable particle size, stable properties after synthesis, strong temperature resistance and salt resistance, good dispersibility in water, and can migrate to deep formations. Some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04
CPCG01N13/04
Inventor 张健李先杰华朝王姗姗陈鑫李宜强胡科王全陈冠中
Owner CHINA NAT OFFSHORE OIL CORP
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