预防水侵的蒸汽吞吐极限边水距离计算方法

doi:10.7657/XJPG20260112

摘要/Abstract

摘要：

对于边水稠油油藏，蒸汽吞吐极限边水距离对蒸汽吞吐新井井位部署和老井开发调整具有重要意义。在小于极限边水距离布井时，容易发生边水水侵，导致稠油油藏蒸汽吞吐的开发效果较差。将蒸汽吞吐后的地层划分为热波及区和冷区，建立了蒸汽吞吐后流场参数的表征方法，通过对热波及区进行长度变换的方式将热波及区综合流度等效为冷区综合流度，在此基础上，考虑稠油启动压力梯度，综合镜像反映与势的叠加原理，建立蒸汽吞吐稠油油藏极限边水距离计算方法。通过建立的极限边水距离与渗透率的关系曲线图版指导新井井位部署，有效预防了边水水侵；通过建立的不同边水距离对应的累计产液量与累计注汽量的关系曲线图版指导老井周期注汽量优化。A井极限边水距离由第一轮次的180 m降低到第二轮次的150 m，预防了稠油油藏边水水侵，通过优化周期注汽量，蒸汽吞吐采收率提高3.1%。

关键词: 蒸汽吞吐, 稠油油藏, 极限边水距离, 势的叠加原理, 镜像反映, 流度, 水侵

Abstract:

For edge-water heavy oil reservoirs, the critical edge-water distance during steam huff and puff is vital for the placement of new wells and the development adjustment of existing wells. When a well for steam huff and puff is placed at a distance less than the critical edge-water distance, edge-water invasion may easily occur, resulting in poor development effect of heavy oil reservoirs. In this paper, the formation after steam huff and puff is divided into a thermally swept zone and a cold zone, and a characterization method of flow field parameters after steam huff and puff is determined. The comprehensive mobility of the thermally swept zone is equivalent to the comprehensive mobility of the cold zone by transforming the length of the thermally swept zone. On this basis, the calculation method of critical edge-water distance during steam huff and puff in heavy oil reservoirs is established considering the start-up pressure gradient of heavy oil, together with the mirror reflection and the potential superposition theory. The results show that the relationship curve between the critical edge-water distance and the permeability is plotted to guide the placement of new wells, effectively preventing edge-water invasion, and the relationship curve between the cumulative liquid production and the cumulative steam injection volume under different edge-water distances is provided to support the optimization of the cyclic steam injection volume in existing wells. Field application in Well A demonstrated that the critical edge-water distance was reduced from 180 m in the first cycle to 150 m in the second cycle, effectively preventing edge-water invasion. By optimizing the cyclic steam injection volume, the steam huff and puff recovery has been increased by 3.1%.

Key words: steam huff and puff, heavy oil reservoir, critical edge-water distance, potential superposition theory, mirror reflection, mobility, water invasion

中图分类号:

TE345

郑文乾, 耿志刚, 葛涛涛, 宋建芳. 预防水侵的蒸汽吞吐极限边水距离计算方法[J]. 新疆石油地质, 2026, 47(1): 111-115.

ZHENG Wenqian, GENG Zhigang, GE Taotao, SONG Jianfang. Calculation Method of Critical Edge-Water Distance During Steam Huff and Puff for Preventing Water Invasion[J]. Xinjiang Petroleum Geology, 2026, 47(1): 111-115.

图/表 5

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