塔河油田碳酸盐岩油藏井组注水开发连通关系研究及应用

Study and application of connecting relationship during water injection of well groups in carbonate reservoirs, Tahe oil field

李桂云 田磊 黄米娜 芦海涛 任科 刘洪源

Li Guiyun Tian Lei Huang Mina Lu Haitao Ren Ke Liu Hongyuan

中国石化 西北油田分公司 采油三厂, 新疆 轮台 841600

No. 3 Oil Production Plant, SINOPEC Northwest Company, Luntai, Xinjiang 841600, China

针对塔河油田碳酸盐岩缝洞型油藏井组试注阶段见效井组少、注采关系不明确等问题，在系统分析注水井及采油井在注水过程中各阶段生产动态变化的基础上，总结出建立井组连通、确定井间关系的3类方法：单元压差曲线、能量节点分析、高压注水创建井组能量平衡。单元压差曲线是针对多井注、一井采井组，通过压差曲线确定井间连通响应情况；能量节点分析是对油井能量指示曲线能量变化关键节点分析，确定井间注采关系；对于井间存在生产压差、注水无法启动井组，通过高压注水建立井组能量平衡，达到启动压差，实现井组连通。通过此3类方法，明确井间关系及动态响应情况，建立完善注采井网，科学指导井组注水开发，提升单元整体注水开发水平，促进塔河油田储量动用。

In the initial attempt of water injection in carbonate fractured-vuggy reservoirs in the Tahe oil field, only a few wells were effective, and the relationship between water injection and production was unclear. Based on the systematic analyses of production dynamic variety during different stages of water injection wells and oil producing wells, three methods, including unit differential pressure curve, energy nodal analysis, and high-pressure water injection to balance well group energy, were summarized to establish well group link and make clear well relationship. Unit differential pressure curve deals with the well group which injecting in multiple wells and producing in a single well, and can determine the connective response among wells. Energy nodal analysis focuses on the changing points on energy indicating curves of oil wells, and shows the relationship between injection and production among wells. For those well groups with differential pressure and were not effective during water injection, we use high-pressure injection to balance energy and establish well group link. With these methods, we determined well relationship and dynamic response, established injection and production well group, guided the production of well group, promoted water injection development level, and enhanced Tahe oilfield reserves production.

https://doi.org/10.11781/sysydz2016S1048