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烟道气稳定重力驱油藏筛选评价方法及应用
施小荣,蒋雪峰,陈凤,吕世瑶,何乃祥,刘灵灵
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(1.中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000;2.克拉玛依职业技术学院,新疆克拉玛依834000;3.中国石化胜利油田分公司技术检测中心,山东东营257000)
摘要:
利用烟道气进行稳定重力驱在国外油田开发试验中取得较好的应用效果。新疆油田在稠油热采过程中产生了大量烟道气,在气源附近存在大量高倾角、厚层块状油藏,如果这些油藏可以进行烟道气稳定重力驱,不但可以大幅度提高原油采收率,还将减少温室气体排放,保护生态环境。为此,通过详细分析国外气体辅助稳定重力驱现场实例,总结了气体辅助稳定重力驱技术的应用条件,在此基础上,结合新疆油田的资源现状,以具有可操作性为原则,按必要性和重要性分级确定烟道气稳定重力驱油藏筛选评价指标及标准,建立油藏筛选评价方法,并通过11个油藏实例验证该方法的可靠性。利用所建方法,对照油藏筛选标准,从气源和井况条件及地质条件方面论证新疆油田红153油藏开展烟道气稳定重力驱的可行性,最终计算烟道气稳定重力驱油藏筛选指数为9.39,说明该区块实施烟道气稳定重力驱在技术上是可行的。新疆油田分公司于2017年12月在红153油藏顶部开展了注气试验,注气井临井产油量由9.5 t/d提高至20.3 t/d,效果明显,证实了油藏筛选方法的准确性。
关键词:  烟道气  稳定重力驱  油藏筛选评价方法  新疆油田  红153油藏
DOI:10.13673/j.cnki.cn37-1359/te.2019.04.014
基金项目:国家科技重大专项“浅层稠油火驱工业化有效开发示范”(2016ZX05055-002-002)和“稠油火驱提高采收率技术研究与应用” (2016ZX05012-003),中国石油科技重大专项“新疆油田浅层稠油稳产提效技术研究与应用”(2017E-0408)。
Reservoir selection evaluation and application of flue gas-assisted gravity drainage technique
SHI Xiaorong,JIANG Xuefeng,CHEN Feng,Lü Shiyao,HE Naixiang,LIU Lingling
(1.Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang,834000,China;2.Karamay Vocational & Technical College,Karamay,Xinjiang,834000,China;3.Technology Inspection Center,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257000,China)
Abstract:
The use of flue gas-assisted gravity drainage technique(FGAGD)has achieved good application results in the foreign oilfields. A large amount of flue gas were produced in the process of heavy oil thermal recovery in Xinjiang Oilfield,and a large number of high-inclined and thick-layered oil reservoirs were distributed near the flue gas source. If these reservoirs can be developed with FGAGD,oil recovery will be enhanced obviously,and greenhouse gas emissions will be reduced to protect the ecological environment. To this end,through a detailed analysis of the successful production cases with GAGD in foreign countries,the application conditions of GAGD technique were summarized. On this basis,comprehensively considering the current resources situation in Xinjiang Oilfield and the availability of the evaluation method,the evaluation indexes and standard of reservoir selection for FGAGD were put forward and classified by the necessity and significance. The method of reservoir selection and evaluation for FGAGD was proposed. The reliability of the technique was then verified by applications to eleven oilfields. The method was applied to discuss the feasibility of FGAGD in the area around Hong153 in Xinjiang Oilfield from several aspects including the flue gas resource,well conditions,geological conditions according to the reservoir screening criteria. The final reservoir selection index with FGAGD was 9.39,which showed the feasibility of FGAGD in the area around well Hong153. The flue gas injection test was carried out at the top of the reservoir Hong153 in December 2017. A remarkable oil increase was observed in the surrounding well from 9.5 t/d to 20.3 t/d,which verified the correctness of the method.
Key words:  flue gas  assisted gravity drainage  reservoir selection evaluation method  Xinjiang Oilfield  Hong153 reservoir

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