海上稠油油田高含水期开发模式研究

doi:10.12108/yxyqc.20180414

岩性油气藏 ›› 2018, Vol. 30 ›› Issue (4): 120–126.doi: 10.12108/yxyqc.20180414

海上稠油油田高含水期开发模式研究

张运来, 廖新武, 胡勇, 李廷礼, 苏进昌

中海石油 (中国) 有限公司天津分公司, 天津 300459

收稿日期:2017-12-03 修回日期:2018-02-27 出版日期:2018-07-21 发布日期:2018-07-21
第一作者:张运来(1982-),男,硕士,工程师,主要从事海上油气田开发调整及提高采收率方面的研究工作。地址:(300459)天津市滨海新区海川路2121号海油大厦B座。Email:zhangyl8@cnooc.com.cn。
基金资助:
“十二五”国家重大科技专项“海上稠油油田高效开发示范工程（二期）”（编号：2011ZX05057）资助

Development models for offshore heavy oil field in high water cut stage

ZHANG Yunlai, LIAO Xinwu, HU Yong, LI Tingli, SU Jinchang

Tianjin Branch of CNOOC Ltd., Tianjin 300459, China

Received:2017-12-03 Revised:2018-02-27 Online:2018-07-21 Published:2018-07-21

摘要/Abstract

摘要： 海上稠油油田进入高含水开发期后，面临采油速度低、水窜快、产量递减快及采收率低等问题，且缺乏分层系开发调整经验，制约了油田的稳产和高效开发。以秦皇岛32-6油田为例，利用室内物理实验、油藏数值模拟等方法，开展了高含水期开发模式研究，明确了海上非均质稠油油藏分层系开发技术界限、注采井间加密模式和底水油藏水平井布井下限。结果表明：当储层原油黏度级差大于3或渗透率级差大于3时，层间干扰系数增大，实施分层系开采，且各开发层系油层厚度为4～8 m；对于强非均质性储层，不同井型、井网加密模式下体积波及系数差别较大，采用反九点转五点水平井+定向井联合井网加密模式，并将井距调整为220 m，体积波及系数显著提高；储层内部隔夹层渗透率、分布面积和分布位置均对水平井产能具有较大影响，基于隔夹层优化布井后，原油黏度为260 mPa·s的底水稠油油藏水平井累计产油量达到5万m³，油柱高度可由12 m下推至7 m。基于上述研究成果形成了“纵向分层系、平面变井网、水平井挖潜”的海上河流相稠油油田高效开发新模式，应用于秦皇岛32-6油田获得了良好的开发效果，可为类似油田的开发提供借鉴。

关键词: 油藏数值模拟, 初始化, 毛管压力, J函数

Abstract: After entering high water cut development stage,the offshore heavy oil field is faced with the problems of low oil recovery speed,rapid water channeling,rapid production decline and low recovery ratio,and lack of experience in stratified development and adjustment,which restricts the stable production and efficient development of the oil field. Taking Qinhuangdao 32-6 oilfield as an example,the development model in high water cut stage was studied by using laboratory physical experiments and reservoir numerical simulation,and the technical limits of stratified development of offshore heterogeneous heavy oil reservoirs,injection-production infill model and downhole limit of horizontal well layout in bottom water reservoir were defined. The results show that when the reservoir viscosity level difference is less than 3 or the permeability difference is greater than 3,the interlayer interference coefficient increases,the stratified development should be carried out,and the thickness of each development layer is 4-8 m. For strong heterogeneous reservoirs,the volumetric sweep efficiency varies greatly under different well types and pattern infill models. By adjusting the well spacing to 220 m,the volumetric sweep efficiency is improved significantly. The permeability,distribution area and distribution position of reservoir interlayer have great influence on the productivity of horizontal well. After the interlayer optimization,the accumulative oil production of the horizontal well in the heavy oil bottom water reservoir with the viscosity of 260 mPa·s is 50 000 m³, and the height of the oil column can be pushed from 12 m to 7 m. Based on the above research results, a new high efficiency development model of"vertical layering system", "plane change well pattern"and"horizontal well tapping potential" in offshore fluvial facies oil fields was formed. It was applied to Qinhuangdao 32-6 oilfield, and good results have been achieved, which can provide reference for the development of similar oilfields.

Key words: reservoir numerical simulation, initialization, capillary pressure, J function

中图分类号:

TE345

张运来, 廖新武, 胡勇, 李廷礼, 苏进昌. 海上稠油油田高含水期开发模式研究[J]. 岩性油气藏, 2018, 30(4): 120–126.

ZHANG Yunlai, LIAO Xinwu, HU Yong, LI Tingli, SU Jinchang. Development models for offshore heavy oil field in high water cut stage[J]. Lithologic Reservoirs, 2018, 30(4): 120–126.

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海上稠油油田高含水期开发模式研究

Development models for offshore heavy oil field in high water cut stage

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