摘要
复杂断块油藏构造破碎,难以形成规则井网,精细的分类型注气(CO2)模式是提升开发效果的关键。以J油田为例,依据现有井网、断块形态及开发方式划分典型类型,优化其注气模式以形成复杂断块油藏分类注气方式选择模板。研究表明,水驱开发窄条带油藏适宜采用底(边)部气水交替方式,而弹性能量开发窄条带则应采用顶部排状注气以发挥重力辅助驱油作用。面积井网油藏则应在原井网条件下实施注气或气水交替开发。对极复杂断块类型,提出“异步吞吐”注气模式,可有效提升其开发效果。该分类注气模式有效指导了J油田注CO2技术应用,获得了良好增油效果,可为其它同类型油藏的注气开发提供借鉴。
Due to the broken nature of geological structure of complex fault block reservoirs,it is difficult to form a regular well pattern.A precise classification of CO 2 gas injection modes is critical to improving development efficiency.Taking J Oilfield as an example,this paper divides the typical groups of complex fault block according to the existing well pattern,fault block shape and development mode;and optimises the corresponding mode of gas injection of different types of reservoir to generate the selection template of classified gas injection mode for different groups of complex fault block reservoir.The results show that for narrow-band reservoirs,bottom(edge)gas-water alternating method is best suited for water flooding development,while top row gas injection should be adopted for natural energy flooding development to increase the effect of gravity-assisted drainage.The horizontal well pattern reservoir should be developed by gas injection or alternate gas and water injection under the original well pattern.For extremely complex blocks,the gas injection mode of‘asynchronous huff and puff’is proposed to improve development efficiency.The classified gas injection mode is effective in guiding field application of CO 2 injection technology in J Oilfield,resulting in good enhanced oil recovery.It can be used as a reference for the gas injection development of other complex fault block reservoirs.
作者
王智林
Wang Zhilin(Sinopec Jiangsu Oilfield Company,Yangzhou,Jiangsu,225009,China)
出处
《天然气与石油》
2020年第4期65-70,共6页
Natural Gas and Oil
基金
江苏省博士后科研资助计划(A类)“复杂断块油藏CO2气顶与人工边水组合驱替技术研究”(1801015 A)。
关键词
复杂断块
分类注气模式
窄条带油藏
重力辅助泄油
异步吞吐
Complex fault block reservoir
Classified CO 2injection model
Narrow-banded reservoir
Gravity assisted drainage
Asynchronous huff and puff
