首页|缝洞型油藏高压扩容注入动态模型及敏感性分析

缝洞型油藏高压扩容注入动态模型及敏感性分析

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高压扩容注水是缝洞型油藏提高采收率的有效方式之一.针对高压扩容注水注采过程认识不清的问题,提出了3类高压扩容注水模式,基于高压扩容注入动态模型,模拟不同敏感性参数对高压扩容注水和生产过程的影响,并结合哈拉哈塘缝洞型油藏矿场实例,分析了3类高压扩容注水模式.结果表明:高压扩容注水有远端低能型、渗流屏障型和近端小储集体型3类模式,3类高压扩容注水模式均可有效动用远端储集体,提高采出程度,渗流屏障型增油效果最优;近端储集体大小影响注水指示曲线拐点出现时间,远端储集体大小影响注水指示曲线出现拐点后的注水难易程度;注水过程的交换指数大于生产过程的交换指数,表明高压扩容注水有效;裂缝闭合压力越小,应力敏感系数越小,注水指示曲线出现拐点越早,累计产液量越高.
Dynamic Model and Sensitivity Analysis of High-Pressure Water Injection for Capacity Expansion of Fractured-Vuggy Reservoirs
High-pressure water injection for capacity expansion is an effective method to enhance the recovery of fractured-vuggy reser-voirs.However,the injection-production process during high-pressure water injection remains unclear.In this paper,three modes of high-pressure water injection for capacity expansion were proposed.Based on a dynamic model of high-pressure water injection for capacity ex-pansion,the impacts of sensitivity parameters on the injection-production process during high-pressure water injection were simulated.The three modes of high-pressure water injection for capacity expansion were analyzed using actual wells drilled in the fractured-vuggy reser-voirs in Halahatang oilfield.The high-pressure water injection for capacity expansion conforms to three modes:far-end low-energy,flow bar-rier,and near-end small reservoir.All three modes can realize effective production of far-end reservoirs to improve recovery efficiency.Flow barrier mode has the optimal EOR effect.The size of the near-end reservoir affects the time at which the water-injection indicator curve inflects,and the size of the far-end reservoir influences the difficulty degree of water injection after the water-injection indicator curve inflects.The fluid exchange index in the water injection process is greater than that in the production process,which indicates that the high-pressure water injection for capacity expansion is effective.The smaller the fracture closure pressure and stress sensitivity coeffi-cient,the earlier the water-injection indicator curve inflects,and the higher the cumulative liquid production.

Halahatang oilfieldfractured-vuggy reservoirhigh-pressure water injection for capacity expansioninjection-production perfor-mancewater injection modesensitivityfluid exchange index

张如杰、陈利新、乐平、肖云、王霞、吕远、杨文明

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西南石油大学 油气藏地质及开发工程全国重点实验室,成都 610500

中国石油 塔里木油田分公司 东河采油气管理区,新疆 库尔勒 841000

陕西延长石油(集团)有限责任公司 研究院,西安 710075

中国石油 塔里木油田分公司 轮南采油气管理区,新疆 库尔勒 841000

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哈拉哈塘油田 缝洞型油藏 高压扩容注水 注采动态 注水模式 敏感性 流体交换指数

四川省科技厅区域创新合作项目中国石油前瞻性基础性技术攻关项目

20QYCX00282021DJ3301

2024

10.7657/XJPG20240410

新疆石油地质
新疆石油学会

新疆石油地质

CSTPCD北大核心
影响因子：0.985
ISSN：1001-3873
年,卷(期)：2024.45(4)
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