特种油气藏2017，Vol.24Issue(1)：133-137,5.DOI:10.3969/j.issn.1006-6535.2017.01.027
超稠油直井水平井组合蒸汽驱参数优化
Steam Flooding Optimization of Vertical-Horizontal Well Combination in Super-Heavy Oil Reservoir
摘要
Abstract
The steam flooding in Wellblock Zhong32 of Fengcheng Oilfield is challenged by multiple huff-puff rounds, low production per cycle, low oil-steam ratio and other issues.A numerical model of typical wellgroup with vertical-horizontal well combination is established, single-factor and orthogonal experiment are used to study the effects of well pattern and well spacing, conversion time, injection-production parameters and other factors on steam flooding performance.According to the research, the optimal parameters for steam flooding with vertical-horizontal well combination are as follows: the vertical-horizontal well spacing is 35 m, lateral section is located in the middle part of vertical well row, steam flooding is carried out after 8-cycle steam huff-puff in vertical well and 2-cycle steam huff-puff in horizontal well, steam injection rate is 70 t/d, production-injection ratio is 1.2, bottom-hole steam ratio exceeds 0.7, wellhead sub-cool (the temperature difference between saturated steam temperature corresponding to wellhead pressure and actual fluid temperature) is 10-20 ℃, cycle injection is carried out after continuous steam injection for 200 d, and the injection cycle is 3 months with an interval of 1 month.After steam flooding is implemented in this test wellblock, the daily oil production increases from 63 t/d to 117 t/d and the stage oil-steam ratio increases from 0.08 to 0.19.This research could provide significant guidance for field adjustment of steam flooding in super-heavy oil reservoir and could also provide theoretical and empirical reference for subsequent technology promotion.关键词
风城油田重32井区/超稠油/直井水平井组合/蒸汽驱/参数优化Key words
Wellblock Zhong32 in Fengcheng Oilfield/super-heavy oil/vertical-horizontal well combination/steam flooding/parameter optimization分类
能源科技引用本文复制引用
巴忠臣,张元,赵长虹,熊伟,李凌铎..超稠油直井水平井组合蒸汽驱参数优化[J].特种油气藏,2017,24(1):133-137,5.基金项目
国家科技重大专项"薄层稠油和超稠油开发技术"(2011ZX05012-004) （2011ZX05012-004）
中国石油"新疆大庆"科技重大专项"浅层稠油、超稠油开发技术研究与应用"(2012E-34-05) （2012E-34-05）
