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Changing-streamline adjusting method after polymer flooding

An adjustment method and polymer technology, which are applied in climate change adaptation, special data processing applications, instruments, etc., can solve problems such as lack of experience and no excessive well pattern adjustment in water drive units, and achieve the effect of reducing risk.

Active Publication Date: 2014-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, follow-up water flooding units with regular high-density well patterns have not adopted excessive well pattern adjustments, and there is no experience to follow. Therefore, we invented a variable flowline adjustment method after polymer flooding to solve the above technical problems

Method used

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  • Changing-streamline adjusting method after polymer flooding
  • Changing-streamline adjusting method after polymer flooding
  • Changing-streamline adjusting method after polymer flooding

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Embodiment Construction

[0035] In order to make the above and other objectives, features, and advantages of the present invention more obvious and understandable, the following examples are specially cited, in conjunction with the accompanying drawings, and are described in detail as follows.

[0036] Such as figure 1 As shown, figure 1 It is a flowchart of a specific embodiment of the method for adjusting the streamline after polymer flooding of the present invention. This method considers the ultra-high water cut development period after polymer flooding where the reservoir is located, and also considers the long-term use of a regular, high-density well pattern.

[0037] In step 101, fine oil reservoir geology research, mainly studying stratigraphic correlation, structure, reservoir, sedimentary facies, oil-water system, temperature and pressure system. The flow proceeds to step 102.

[0038] In step 102, combined with the fine reservoir geology research, a fine reservoir three-dimensional geological mod...

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Abstract

The present invention provides a changing-streamline well pattern adjusting method of an oil reservoir in the stage after polymer flooding in the oilfield development process. The changing-streamline well pattern adjusting method after polymer flooding includes the steps that fine geological research is performed, and a fine oil reservoir three-dimensional geological model is established; a numerical simulation model is established, and the saturation distribution rule of remaining oil is analyzed; feasibility analysis for series-of-strata well pattern adjustment is performed; a changing-streamline well pattern adjusting scheme is designed; index prediction of the scheme is performed with an oil reservoir numerical simulation method, and an optimal scheme is selected. The changing-streamline well pattern adjusting method after polymer flooding has very good practicability for gradual decrease of yield of the oil reservoir in the extra-high water containing period after polymer flooding and acceleration of oil production, the oil production rate in the extra-high water containing period after oil reservoir polymer flooding can be effectively and economically improved, and the cumulative oil production of maturing oil fields is substantially increased.

Description

Technical field [0001] The invention relates to a variable streamline adjustment method for a medium-high permeability and extra-high water-cut oil reservoir, in particular to a method for adjusting the streamline of a reservoir that uses a regular high-density well pattern for long-term development in a polymer flooding subsequent waterflooding extra-high water-cut period . Background technique [0002] In oilfield development, the subsequent waterflooding stage of polymer flooding is in the development stage of high water cut, high recoverable reserves recovery degree, and high remaining recoverable reserves oil recovery rate. After polymer flooding, the recovery rate has been greatly improved, but the remaining oil saturation in the oil well row, the gap between the well row, and the water well row area has become larger, and the remaining oil saturation in the diversion line is much larger than the main flow line. The main flow line area has been scoured by long-term superio...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02A10/40
Inventor 黄迎松贾俊山吕远刘志宏曹绪龙张以根杨仁金王宁柳世成刘丽杰曾显香元福卿单联涛姚惠利刘海成李文华张宁
Owner CHINA PETROLEUM & CHEM CORP
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