吉7井区稠油油藏油水自乳化作用及水驱特征

doi:10.7657/XJPG20210607

摘要/Abstract

摘要：

因具有自乳化特征,吉7井区稠油油藏常温注水开发水驱特征不同于稀油油藏和普通稠油油藏,水驱开发驱油效率更高。基于吉7井区自乳化成因及乳化液特性分析,明确吉7井区水驱特征,认为吉7井区中含水期含水率长期稳定的主要原因是油包水自乳化使水油比接近1。进一步提出稳定水油比是适用于稠油油藏水驱管理的有效方法之一,保持水油比稳定在1可使稠油油藏采收率最大化。

关键词: 吉7井区, 稠油油藏, 自乳化, 乳化液特性, 扩大波及体积, 水油比, 水驱特征, 水驱管理

Abstract:

With self-emulsification function, the heavy oil reservoir in Wellblock Ji-7 is different from light oil reservoirs and conventional heavy oil reservoirs in waterflooding behaviors at normal temperature, and the waterflooding efficiency is higher in the reservoir. After analyzing the cause of the self-emulsification and the characteristics of emulsion in Wellblock Ji-7, the waterflooding behaviors are defined and it is considered that the main reason for a long-term steady water cut in the middle water-cut period in Wellblock Ji-7 is that the water-to-oil ratio is close to 1 due to the self-emulsification of water-in-oil emulsion. It is further proposed that stabilizing the water-to-oil ratio is one of the most effective measures for waterflooding development in heavy oil reservoirs, and keeping the water-to-oil ratio around 1 can maximize the recovery of heavy oil reservoirs.

Key words: Wellblock Ji-7, heavy oil reservoir, self-emulsification, emulsion characteristic, expanding swept volume, water-to-oil ratio, waterflooding law, waterflooding management

中图分类号:

TE341

刘艳红, 万文胜, 罗鸿成, 李琛, 张武, 马宝军. 吉7井区稠油油藏油水自乳化作用及水驱特征[J]. 新疆石油地质, 2021, 42(6): 696-701.

LIU Yanhong, WAN Wensheng, LUO Hongcheng, LI Chen, ZHANG Wu, MA Baojun. Self-Emulsification and Waterflooding Characteristics of Heavy Oil Reservoirs in Wellblock Ji-7[J]. Xinjiang Petroleum Geology, 2021, 42(6): 696-701.

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