井间微地震监测技术现场应用效果分析

井间微地震监测技术的现场应用是通过监测注水过程中产生的微震波,可以确定出水驱前缘位置、优势注水方向、注水波及面积等资料;在水力压裂时,进而还可确定出裂缝分布的方位、长度、高度及地应力方向等地层参数.为油藏工程师进行方案优化、提高整体开发效果和采收率等提供依据.在简要介绍了井间微地震监测技术基本原理的基础上,结合地质动、静态资料,对微地震法在水驱前缘测试及压裂裂缝监测两方面在大庆油田的应用效果进行了分析.现场应用证明,井间微地震监测技术在油田动态分析及压裂效果评价等领域具有良好的应用前景.

Analysis to the field application effect of inner well microseismic monitoring technique

The mechanism of the field application for inner well microseismic monitoring technique is that by monitoring the microseismic wave produced in the process of water injection, the frontal zone of waterflood, outstanding waterflood direction and waterflood swept area could be identified, and under the circumstances of hydraulic fracturing, reservoir parameters such as fracture distribution, length, height and ground stress direction could also be identified, thus is supportive to the project optimization and development effect and recovery promotion. Based on a brief introduction to the principles of inner well microseismic monitoring technique and the integration of dynamic and static geological data, the authors analyzes the application effect of microseismic monitoring technique on the two aspects of waterflood frontal zone tests and induced fracture monitoring in Daqing Oilfield. Field application suggests that the technique has a preferential application prospect in the oilfield dynamic analysis and postfracture response evaluation.