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A screening method for viscosity reducer applied to steam huff and puff oil wells

A screening method and viscosity reducer technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluids, etc., can solve the problems of difficult viscosity reducer, heavy workload, cumbersome and other problems, so as to avoid complexity and optimization Effect of Screening Analysis Methods

Active Publication Date: 2019-10-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a viscosity reducer applied to steam huff and puff oil wells, aiming at the technical problems that the existing viscosity reducer screening method is huge, complicated and cumbersome, and it is difficult to efficiently and quickly select the best viscosity reducer. agent optimization method

Method used

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  • A screening method for viscosity reducer applied to steam huff and puff oil wells
  • A screening method for viscosity reducer applied to steam huff and puff oil wells
  • A screening method for viscosity reducer applied to steam huff and puff oil wells

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Embodiment 1

[0024] Take the characteristics of A oilfield block as an implementation example. Using the preferred method of viscosity reducer for steam stimulation oil wells of the present invention, the specific steps are as follows:

[0025] Step S1. Establish the performance evaluation index gradient of the chemical viscosity reduction and injection enhancement system according to the performance of the viscosity reduction agent required by the steam huff and puff oil well. Only two aspects are needed, one is the viscosity reduction effect, and the other is the temperature resistance stability. The composition is ① viscosity reduction effect > ② temperature stability. The viscosity reduction effect is the core parameter affecting the injection increase, and the temperature resistance stability is the core parameter of the post-efficiency throughput increase.

[0026] In step S2, the changes in physical properties of crude oil are affected by steam during the mine steam huff and puff pr...

Embodiment 2

[0038] Take the characteristics of B oilfield block as an implementation example. Using the method for optimizing the viscosity reducer applied to steam stimulation oil wells of the present invention, the specific steps are as follows:

[0039] Step S1. Establish the performance evaluation index gradient of the chemical viscosity reduction and injection enhancement system according to the performance of the viscosity reduction agent required by the steam huff and puff oil well. Only two aspects are needed, one is the viscosity reduction effect, and the other is the temperature resistance stability. The composition is ① viscosity reduction effect > ② temperature stability. The viscosity reduction effect is the core parameter affecting the injection increase, and the temperature resistance stability is the core parameter of the post-efficiency throughput increase.

[0040] Step S2, the changes in physical properties of the crude oil during steam huff and puff of the mine are aff...

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Abstract

The invention discloses a viscosity reducer optimization method applied to a steam huff and puff oil well. The viscosity reducer optimization method comprises the following steps: S1, establishing a performance evaluation index of a chemical viscosity reduction and augmented injection system according to the action performance of a viscosity reducer required by the steam huff and puff oil well; S2, analyzing crude oil viscosity change characteristics in the mine field steam huff and puff process, and finding out main factors influencing crude oil viscosity increase of a mine field layer; S3, determining the type of the viscosity reducer according to the main factors of the crude oil viscosity increase; and S4, selecting a plurality of viscosity reducers with good effects on the market within the selected viscosity reducer type range, carrying out indoor test analysis on the viscosity reduction effects and temperature resistance stability of the plurality of viscosity reducers on the crude oil viscosity of the mine field layer, and screening out the chemical viscosity reducers suitable for the current oil reservoir condition. The method is applied to the reality of the mine field, alarge amount of evaluation experiment work can be reduced, and the application type of the chemical viscosity reducer applied to the mine field steam huff and puff oil well can be quickly judged.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for optimizing a viscosity reducer applied to steam stimulation oil wells. Background technique [0002] Viscous reducers for heavy oil are produced and developed in oil fields in my country, and are often used in oil and gas transportation. Due to the continuous development of viscosity reducers at this stage, there are many types of viscosity reducers with a viscosity reduction rate of more than 90%. For example, Wei Xiaoming (Wei Xiaoming, Liu Xilin, Wang Weidong, et al. Overview of Viscosity Reduction Methods for Heavy Oil[J]. Fine Petrochemical Industry, 2002, 5(9): 45-48.) etc. self-made LHFR-1 water-based emulsifier While the viscosity reduction rate is above 99.85%, it also has the characteristics that the emulsion can be automatically demulsified and dehydrated within 72 hours. Qin Bing (Qin Bing, Peng Pu, Jing Zhenhua. Composition and Properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/24E21B43/22
Inventor 叶仲斌朱诗杰施雷庭朱珊珊
Owner SOUTHWEST PETROLEUM UNIV