多层稠油油藏对向火驱开采方法研究  

Study on mining method of opposite fire flooding in multi-layer heavy oil reservoir

作　　者：袁士宝[1] 孙健[1] 宫宇宁 何慧卓 蒋海岩[1,3] YUAN Shibao;SUN Jian;GONG Yuning;HE Huizhuo;JIANG Haiyan(College of Petroleum Engineering,Xi’an Shiyou University,Xi’an 710065,China;Research Institute of Exploration and Development,Liaohe Oilfield Company,Liaoning Panjin 124000,China;Key Laboratory of Gas Hydrate,Chinese Academy of Sciences(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences),Guangzhou 510640,China)

机构地区：[1]西安石油大学石油工程学院,西安710065 [2]辽河油田公司勘探开发研究院,辽宁盘锦124000 [3]中国科学院天然气水合物重点实验室(中国科学院广州能源研究所),广州510640

出　　处：《非常规油气》2023年第2期26-32,共7页Unconventional Oil & Gas

基　　金：国家自然基金项目“基于燃料沉积演化机制的火烧油层启动与控制”(51674198);西安石油大学研究生创新与实践能力培养计划立项项目“多层稠油油藏对向火驱开采方法研究”(YCS21213167);中国科学院天然气水合物重点实验室(中国科学院广州能源研究所)项目“热激励开采天然气水合物孔渗结构表征方法研究”(E029kf1401)。

摘　　要：火烧油层(火驱)已成为稠油油藏重要开采技术之一,目前主要应用于厚层块状普通稠油油藏、薄互层状普通稠油油藏以及多层超稠油油藏。针对传统热力采油技术中可能存在的生产井附近原油受热差、热能利用率低或产量低等一系列问题,提出了一种对向火驱开采多层稠油油藏的方法。即不同层系的井网火驱注采方向相对,使得不同层系之间的火驱燃烧面运动方向相对,这样可以充分利用相邻层系油层的燃烧热量,提高采收率。以辽河油田杜66区块为例,油藏数值模拟表明,与传统单向火驱相比,采用对向火驱可提高原油采收率4.27%。对其主要影响因素进行参数优选,当注采距离为140 m,井组间距为30 m,注气强度为1 200 m3/m时可实现采出程度最高。该方法适用于多层稠油油藏的热力开采,在稠油热采开发中表现出较大可行性和潜力。Burning reservoir(fire flooding) technology has become one of the important recovery technologies of heavy oil reservoir. At present, it is mainly used in thick ordinary heavy oil reservoir, thin interbed ordinary heavy oil reservoir and multi-layer super heavy oil reservoir. In order to solve a series of problems that may exist in the traditional thermal oil mining technology, such as poor heating of crude oil near the production well, low thermal energy utilization or low production, a method for developing multilayer heavy oil reservoir by opposite fire flooding is proposed. The injection and production directions of well patterns of different layers are relative, so that the movement directions of fire flooding combustion surfaces between different layers are relative, which can make full use of the heat of adjacent layers to enhance oil recovery. Taking Du66 block of Liaohe Oilfield as an example, the results of numerical simulation show that compared with unidirectional traditional fire flooding, the oil recovery can be increased by 4.27%. Through parameter optimization in main influencing factors of opposite fire flooding, it is concluded that when the injection production distance is 140 m, the well group spacing is 30 m and the gas injection intensity is 1 200 m~3/m, the recovery degree is the highest. This method is suitable for thermal mining of multiple heavy oil reservoirs, and shows great feasibility and potential in thermal mining development of heavy oil.

关 键 词：对向火驱 火烧油层 提高热效率 热采 开采方法 

分 类 号：TE357[石油与天然气工程—油气田开发工程]