缝洞型油藏高压扩容注入动态模型及敏感性分析  

Dynamic Model and Sensitivity Analysis of High-Pressure Water Injection for Capacity Expansion of Fractured-Vuggy Reservoirs

作　　者：张如杰 陈利新 乐平[1] 肖云 王霞 吕远 杨文明 ZHANG Rujie;CHEN Lixin;YUE Ping;XIAO Yun;WANG Xia;LYU Yuan;YANG Wenming(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;PetroChina Tarim Oilfield Company,Donghe Oil and Gas Production Management Area,Korla,Xinjiang 841000,China;b.PetroChina Tarim Oilfield Company,Lunnan Oil and Gas Production Management Area,Korla,Xinjiang 841000,China;Research Institute,Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an,Shaanxi 710075,China)

机构地区：[1]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 [2]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 [3]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 [4]陕西延长石油(集团)有限责任公司研究院,西安710075

出　　处：《新疆石油地质》2024年第4期460-469,共10页Xinjiang Petroleum Geology

基　　金：四川省科技厅区域创新合作项目(20QYCX0028);中国石油前瞻性基础性技术攻关项目(2021DJ3301)。

摘　　要：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。High-pressure water injection for capacity expansion is an effective method to enhance the recovery of fractured-vuggy reservoirs.However,the injection-production process during high-pressure water injection remains unclear.In this paper,three modes of highpressure water injection for capacity expansion were proposed.Based on a dynamic model of high-pressure water injection for capacity expansion,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 reservoirs in Halahatang oilfield.The high-pressure water injection for capacity expansion conforms to three modes:far-end low-energy,flow barrier,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 coefficient,the earlier the water-injection indicator curve inflects,and the higher the cumulative liquid production.

关 键 词：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 

分 类 号：TE344[石油与天然气工程—油气田开发工程]