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Period injection-production method of waterflooding sandstone oil field

A technology for oilfields and sandstones, which is applied in the field of waterflooding development in sandstone oilfields, can solve problems such as the difficulty of sweeping volume, large increase in liquid-oil ratio, and unbalanced storage and production, so as to make up for the limitations of technology and economic benefits, improve recovery, and save The effect of water injection

Inactive Publication Date: 2007-02-14
DAQING OILFIELD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Many oilfields in my country have entered the post-production period of ultra-high water cut. Oilfield development is facing the severe situation of unbalanced storage and production and a large increase in liquid-to-oil ratio. However, conventional potential tapping measures and water injection well adjustment technology are limited by technology and economic benefits, further increasing the spread volume is very difficult

Method used

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  • Period injection-production method of waterflooding sandstone oil field
  • Period injection-production method of waterflooding sandstone oil field
  • Period injection-production method of waterflooding sandstone oil field

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specific Embodiment approach 1

[0021] Specific implementation mode 1: In this implementation mode, a set of periodic water injection methods and technical boundaries are established based on the carried out periodic water injection tests and combined with the actual development of oilfields. Its specific implementation steps are as follows:

[0022] 1. Optimization of periodic water injection method and optimization of parameters

[0023] 1. Optimal periodic water injection well area

[0024] Due to differences in well patterns, geological conditions, formation pressure, and comprehensive water cut in each block, not all wells in each block are suitable for periodic water injection. The following two conditions must be met when optimizing the well area:

[0025] First, the well pattern has a high degree of perfection (with more than two incoming water directions), avoiding fault-developed well areas and casing damaged well areas. The degree of perfection of the well pattern and the degree of connectivity...

specific Embodiment approach 2

[0077] Specific implementation mode 2: In this implementation mode, a set of periodic oil recovery methods and technical boundaries are established based on the carried out cyclic oil recovery test and combined with the actual oil field development. Its specific implementation steps are as follows:

[0078] 1. Well selection principle

[0079] (1) Parameter selection

[0080] Four principles are followed in the selection of parameters: first, the principle of being able to obtain a large number, convenient acquisition, and sufficient information sources is to select a large number of dynamic and static data collected in the daily production process of oil and water wells; second, each parameter is independent and can represent The different characteristics of plane contradictions; the third is that the selected parameters are directly related to the appearance of plane contradictions; the fourth is that the formed method has strong applicability and can be applied in a wide r...

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Abstract

A periodical injection-production method of water-injected sandstone oil field utilizes well area selection, periodical water injection mode, and water interval injection period, water injection ratio recovery to form an optimized technical scheme for saving the amount of water injection and for controlling decreasing amplitude of production output.

Description

technical field [0001] The invention belongs to the field of oil exploitation, and in particular relates to a water injection development method for a sandstone oil field. Background technique [0002] The essence of the hydrodynamic method is the reasonable adjustment and optimization of the working system of oil and water wells. A large number of periodic water injection mechanisms and mine field tests have been done at home and abroad. The Soviet scholar Surguchev first proposed the concept of periodic water injection in the late 1950s. Establishing an unstable state can enhance the oil recovery process. According to this conclusion, since 1964, the former Soviet Union has carried out field tests and industrial exploitation in more than 50 oil fields. Field practice and indoor numerical simulation calculations show that periodic water injection in various wettable oil layers can achieve good results, but a complete set of technical solutions has not been formed. [000...

Claims

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Application Information

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IPC IPC(8): E21B43/20
Inventor 万新德王武高淑明
Owner DAQING OILFIELD CO LTD
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