缝洞型油藏高压扩容注入动态模型及敏感性分析

doi:10.7657/XJPG20240410

新疆石油地质 ›› 2024, Vol. 45 ›› Issue (4): 460-469.doi: 10.7657/XJPG20240410

缝洞型油藏高压扩容注入动态模型及敏感性分析

张如杰¹^,^2a(), 陈利新^2a, 乐平¹(), 肖云^2a, 王霞^2a, 吕远¹^,³, 杨文明^2b

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 a.东河采油气管理区；b.轮南采油气管理区，新疆库尔勒 841000
3.陕西延长石油（集团）有限责任公司研究院，西安 710075

收稿日期:2023-11-03 修回日期:2023-11-22 出版日期:2024-08-01 发布日期:2024-07-23
通讯作者: 乐平（1983-），男，湖北随州人，教授，博士，油气藏工程及数值模拟，（Tel）13088040285（Email）yuepingaa@126.com
作者简介:张如杰（1999-），男，四川简阳人，硕士研究生，油气藏工程及数值模拟，（Tel）18202852108（Email）zrj1999@126.com
基金资助:
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)

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

ZHANG Rujie¹^,^2a(), CHEN Lixin^2a, YUE Ping¹(), XIAO Yun^2a, WANG Xia^2a, LYU Yuan¹^,³, YANG Wenming^2b

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation，Southwest Petroleum University，Chengdu，Sichuan 610500，China
2. PetroChina Tarim Oilfield Company，a.Donghe Oil and Gas Production Management Area；b.Lunnan Oil and Gas Production Management Area，Korla，Xinjiang 841000，China
3. Research Institute，Shaanxi Yanchang Petroleum (Group) Co.，Ltd.，Xi’an，Shaanxi 710075，China

Received:2023-11-03 Revised:2023-11-22 Online:2024-08-01 Published:2024-07-23

摘要/Abstract

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。

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

Abstract:

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 high-pressure 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.

Key words: Halahatang oilfield, fractured-vuggy reservoir, high-pressure water injection for capacity expansion, injection-production performance, water injection mode, sensitivity, fluid exchange index

中图分类号:

TE344

张如杰, 陈利新, 乐平, 肖云, 王霞, 吕远, 杨文明. 缝洞型油藏高压扩容注入动态模型及敏感性分析[J]. 新疆石油地质, 2024, 45(4): 460-469.

ZHANG Rujie, CHEN Lixin, YUE Ping, XIAO Yun, WANG Xia, LYU Yuan, YANG Wenming. Dynamic Model and Sensitivity Analysis of High-Pressure Water Injection for Capacity Expansion of Fractured-Vuggy Reservoirs[J]. Xinjiang Petroleum Geology, 2024, 45(4): 460-469.

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参数	取值	参数	取值
注入流量/（m³·h^-1）	15	水相黏度/（mPa·s）	1
第1套储集体储量/10⁴ m³	10	油相黏度/（mPa·s）	30
第2套储集体储量/10⁴ m³	50	应力敏感系数	0.3
第1套和第2套储集体综合压缩系数/MPa^-1	0.001 273	裂缝闭合压力/MPa	80
油相交换指数/（m³·d^-1·MPa^-1）	50	第1套储集体初始压力/MPa	55
通过裂缝储集体的水相分流率	0.5	第2套储集体初始压力/MPa	65

参数	取值	参数	取值
生产流量/（m³·h^-1）	15	水相黏度/（mPa·s）	1
第1套储集体储量/10⁴ m³	10	油相黏度/（mPa·s）	30
第2套储集体储量/10⁴ m³	50	应力敏感系数	0.3
第1套和第2套储集体综合压缩系数/MPa^-1	0.001 273	裂缝闭合压力/MPa	80
油相交换指数/（m³·d^-1·MPa^-1）	50	第1套储集体初始压力/MPa	90
通过裂缝储集体的水相分流率	0.5	第2套储集体初始压力/MPa	90

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

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