中深层稠油水平井前置CO2蓄能压裂技术

doi:10.12108/yxyqc.20240117

岩性油气藏 ›› 2024, Vol. 36 ›› Issue (1): 178–184.doi: 10.12108/yxyqc.20240117

• 石油工程与油气田开发 • 上一篇

中深层稠油水平井前置CO₂蓄能压裂技术

杨兆臣¹, 卢迎波¹, 杨果¹, 黄纯¹, 弋大琳¹, 贾嵩¹, 吴永彬², 王桂庆¹

1. 中国石油新疆油田公司风城油田作业区, 新疆克拉玛依 834000;
2. 中国石油勘探开发研究院, 北京 100083

收稿日期:2022-02-28 修回日期:2022-05-23 出版日期:2024-01-01 发布日期:2024-01-02
第一作者:杨兆臣(1971-),男,硕士,高级工程师,主要从事稠油、超稠油开发实验及油藏工程方面的研究工作。地址:(834000)新疆克拉玛依市克拉玛依区胜利路62号。Email:bkqyzc@petrochina.com.cn。
通信作者: 卢迎波(1988-),男,硕士,工程师,主要从事稠油、超稠油开发方面的研究工作。Email:fcluyb@petrochina.com.cn。
基金资助:
国家科技重大专项“大型油气田及煤层气开发”（编号：2016ZX05012）、中国石油股份有限公司重大专项“未动用稠油开采新技术研究”（编号：2019B-1411）、“新疆油田浅层稠油稳产提效技术研究与应用”（编号：2017E-0408）、“稠油提高采收率关键技术研究”（编号：2021DJ1403）联合资助。

Pre-CO₂ energy storage fracturing technology in horizontal wells for medium-deep heavy oil

YANG Zhaochen¹, LU Yingbo¹, YANG Guo¹, HUANG Chun¹, YI Dalin¹, JIA Song¹, WU Yongbin², WANG Guiqing¹

1. Fengcheng Oilfield District, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China;
2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Received:2022-02-28 Revised:2022-05-23 Online:2024-01-01 Published:2024-01-02

摘要/Abstract

摘要： 利用准噶尔盆地西北缘乌夏地区中深层稠油油藏参数，对水平井前置CO₂蓄能压裂技术的开发机理、关键操作参数及开发效果进行了详细研究。研究结果表明： ①伴随压裂—焖井—生产等开发阶段的延伸，前置CO₂蓄能压裂后的油井逐步显现出增能改造、扩散降黏、膨胀补能、释压成泡沫油流等特性，井底流压提高了2～4 MPa，CO₂扩散至油藏的1/3，原油黏度降至500 mPa·s以下，泡沫油流明显； ②研究区最优压裂段间距为60 m、裂缝半长为90 m、裂缝导流能力为10 t/m，CO₂最佳注入强度为1.5 m³/m，注入速度为1.8 m³/min，油井焖井时间为30 d，油藏采收率提高了2%～3%； ③通过与常规压裂生产效果进行对比，前置CO₂蓄能压裂技术可使产油量提高5.2 t/d，预测CO₂换油率达2.45，开发效果显著提升。

关键词: 中深层稠油, 水平井, 二氧化碳蓄能压裂, 低碳采油, 乌夏地区, 准噶尔盆地

Abstract: The development mechanism, key operating parameters and development effects of CO₂ energy storage pre-fracturing technology for horizontal wells were studied by using the parameters of medium-deep heavy oil reservoirs in Wuxia area, northwestern margin of Junggar Basin. The results show that:(1) With the extension of development stages such as fracturing, soaking and production, the oil wells after pre-CO₂ energy storage fracturing show the characteristics of energy increase, diffusion and viscosity reduction, expansion and energy supplement, and secondary foam oil displacement. The bottom hole flowing pressure increased by 2-4 MPa, the CO₂ diffused to one third of the reservoir, the crude oil viscosity decreased to less than 500 mPa·s, and the foam oil flow was obvious.(2) The optimal fracturing interval in the study area is 60 m, the half length of the fracture is 90 m, the fracture conductivity is 10 t/m, the optimal CO₂ injection intensity is 1.5 m³/m, the injection rate is 1.8 m³/min, the soaking time of oil wells is 30 d, and the oil reservoir recovery factor increases by 2%-3%.(3) Compared with conventional fracturing, the pre-CO₂ energy storage fracturing can increase the production by 5.2 t/d, and the oil exchange rate of CO₂ is predicted to be 2.45. The development effect was significantly improved.

Key words: medium-deep heavy oil, horizontal well, CO₂ energy storage fracturing, low-carbon oil recovery, Wuxia area, Junggar Basin

中图分类号:

TE345

杨兆臣, 卢迎波, 杨果, 黄纯, 弋大琳, 贾嵩, 吴永彬, 王桂庆. 中深层稠油水平井前置CO₂蓄能压裂技术[J]. 岩性油气藏, 2024, 36(1): 178–184.

YANG Zhaochen, LU Yingbo, YANG Guo, HUANG Chun, YI Dalin, JIA Song, WU Yongbin, WANG Guiqing. Pre-CO₂ energy storage fracturing technology in horizontal wells for medium-deep heavy oil[J]. Lithologic Reservoirs, 2024, 36(1): 178–184.

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中深层稠油水平井前置CO₂蓄能压裂技术

Pre-CO₂ energy storage fracturing technology in horizontal wells for medium-deep heavy oil

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