长庆特低渗透油藏注水动态裂缝及井网加密调整模式研究

王文环; 彭缓缓; 李光泉; 雷征东; 吕文峰

doi:10.11911/syztjs.201501018

长庆特低渗透油藏注水动态裂缝及井网加密调整模式研究

1.
中国石油勘探开发研究院, 北京 100083;
2.
中石化石油工程技术服务有限公司, 北京 100101

基金项目:

中国石油天然气股份有限公司油气田开发重大科技项目"低渗、特低渗透油田油藏工程与数模方法研究"(编号:2011B-1205)资助。

详细信息

作者简介:
王文环(1965-),女,山东平原人, 1991年毕业于石油大学(华东)石油地质勘查专业,2000年获石油大学(华东)石油与天然气工程专业硕士学位,2005年获中国石油大学(华东)油气田开发工程专业博士学位,高级工程师,主要从事低渗透油气田开发工作。

中图分类号: TE348;TE33⁺1
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出版历程
- 收稿日期: 2014-11-04
- 刊出日期: 1899-12-31

Research on Water Flooding Dynamic Fractures to Optimize Infill Drilling Spacing in Ultra-Low Permeability Reservoirs,Changqing Oilfield

1.
PetroChina Research Institute of Petroleum Exploration & Development, Beijing, 100083, China;
2.
Sinopec Oilfield Service Corporation, Beijing, 100101, China

摘要

摘要: 为改善长庆特低渗透油藏中高含水期水驱开发效果,进一步提高采收率,综合运用储层地质力学、油藏工程及数值模拟等方法,研究了注水动态裂缝开启机理及延伸规律,给出了不同方向裂缝开启压力界限。当注水压力超过现今最小水平主应力时,单方向注水动态裂缝开启;注水压力越高,现今最大、最小水平主应力差越小,注采井连线与最大水平主应力方向夹角越小,越容易产生多方向注水动态裂缝。根据不同缝网匹配油藏剩余油分布规律,采取了不同的井网加密调整模式,限定注水压力控制多方向裂缝开启,沿现今最大水平主应力方向注水动态裂缝线性注水、侧向基质驱替等措施,改善了水驱效果,提高了油藏水驱采收率,为提高特低渗透油藏水驱采收率提供了新思路。
- 低渗透油藏 /
- 注水动态裂缝 /
- 井网调整 /
- 长庆油田
Abstract: To improve water flooding effects and enhance the oil recovery of ultra-low permeability reservoirs passessing a high water cut, reservoir geomechanics, engineering and numerical simulation were combined to reveal the opening mechanism and propagation of dynamic fractures and define the pressure limits required to open fractures in different directions. When injection pressure exceeds minimum horizontal stress, dynamic fractures will open in the orientation of maximum horizontal stress.High injection pressure and low stress difference between maximum and minimum horizontal stresses would result in a low-angle between injection-production well orientation and the maximum horizontal stress direction, in which multiple dynamic fractures might be generated in various directions.Effective infilling modes and optimized spacing for reservoirs with different well pattern could help to improve water flooding effect and dramati-cally enhance the recovery of hydrocarbon, along with avoiding frac interference.The proposed development mode as linear water flooding well pattern along maximum horizontal stress, lateral matrix displacement, limit injection pressure and control multiple fractures opening, provides a new approach for improving water flooding recovery in ultra-low permeability reservoirs.
- low permeability reservoir /
- water flooding dynamic fracture /
- pattern modification /
- Changqing Oilfield

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参考文献(15)

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长庆特低渗透油藏注水动态裂缝及井网加密调整模式研究

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出版历程

Research on Water Flooding Dynamic Fractures to Optimize Infill Drilling Spacing in Ultra-Low Permeability Reservoirs,Changqing Oilfield

期刊类型引用(8)

其他类型引用(5)

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