海上稠油油藏同井采注热水驱完井设计与应用

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英文篇名：Design and application of completion string for hot water injection and production in the same well in offshore heavy oil reservoirs 作者：张永涛 ; 张俊斌 ; 张伟国 ; 秦世利 英文作者：ZHANG Yongtao;ZHANG Junbin;ZHANG Weiguo;QIN Shili;CNOOC China Limited Shenzhen Branch; 关键词：海上油田 ; 稠油 ; 能量补充 ; 采下注上 ; 同井采注 ; 热水驱 英文关键词：offshore oilfield;;heavy oil;;energy supplement;;production in the lower part and injection in the upper part;;injection and production in the same well;;hot waterflooding 中文刊名：SYZC 英文刊名：Oil Drilling & Production Technology 机构：中海石油(中国)有限公司深圳分公司; 出版日期：2018-07-20 出版单位：石油钻采工艺 年：2018 期：v.40;No.238 基金：中海石油(中国)有限公司深圳分公司生产性科研项目“南海东部海域典型油气田增产措施技术研究”(编号:SCKY-2017-SZ-07) 语种：中文; 页：SYZC201804008 页数：5 CN：04 ISSN：13-1072/TE 分类号：45-48+68

摘要

南海X油田为普通稠油油藏,属于边水驱动,储层面积大但厚度薄,投产后存在地层能量快速衰竭、产液量迅速递减的问题。海上油田具有油井投资高、平台面积受限、井槽数量少的特点,不适宜采用地面注水工艺。为解决地层能量补充难题,在调研国内外同井采注技术和经验的基础上,优化设计了一套适合稠油油藏的同井采注热水驱完井管柱,可以将深部高温地层水加压注入至油层,补充油层驱动能量,提高储层温度,降低油水流度比,提高波及系数和驱油效率。现场试验结果表明,该同井采注水完井管柱稳定可靠,以较低成本解决了稠油油藏地层能量补充的难题,邻近油井增产效果明显,为类似油田高效开发提供经验。
        It is a conventional heavy oil reservoir with edge water in X Oilfield, the South China Sea, and its reservoirs cover the large area but they are thin. After it is put into production, the formation energy decays fast and liquid production rate declines quickly. The oil reservoirs were not cognized sufficiently in the early stage, and offshore oilfields are characterized by great oil well investment, limited platform area and fewer well slots, so the ground water injection technology is not suitable. In order to solve the difficulty of formation energy supplement, the technologies and experience of injection and production in the same well at home and abroad were investigated in this paper. Then, a completion string suitable for hot water injection and oil production in the same well in heavy oil reservoirs was designed and optimized. By virtue of this string, the high-temperature formation water in the deep layers is pressurized and then injected into oil layers to supplement its driving energy, increase reservoir temperature, reduce oil/water mobility ratio and improve sweep efficiency and oil displacement efficiency. Field test results show that the completion string for water injection and production in the same well is reliable and stable, and it realizes formation energy supplement of heavy oil reservoirs at lower cost. Besides, oil enhancement of its neighboring oil wells is remarkable. The research results provide the valuable experience for the efficient development of similar oilfields.

引文

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