渗透率评价:电缆测量方法的应用综述

Evaluation.of permeability:a review of the application of cable measurement method

渗透率是和地下油气藏开采及流体注入有关的重要流动参数。有多种方法(如电缆测量方法、岩心测量以及试井)用于评价地层渗透率。以单井产能预测为目的的油气藏描述项目开展、以提高油气井生产能力为目的的射孔方案优化设计,都对地层渗透率的高精度定量评价提出要求。不同的渗透率评价方法用不同的原始资料估算出的渗透率随岩石的状态(井下环境)、流体饱和度分布、流体流向以及探测媒介的规模等因素不同而变化。本文重点梳理了国际公司海外项目已经开展或将要开展的电缆测量方法评价地层渗透率的技术(包括一些探索者利用采集到的测量数据做地层渗透率评价的应用案例),同时对非电缆测量方式进行渗透率评价的技术做了介绍,并对不同渗透率评价技术的优势和不足做了对比说明,结合客户实际采用的渗透率评价做法给出了地层渗透率评价技术的发展方向。

Permeability is an important flow parameter related to down-hole oil and gas reservoir expolitation and injection.Several methods,such as wire-line measurements,core measurements,and well tests,are used to evaluate formation permeability.The quantitative evaluation of the permeability is required for the development of oil and gas reservoir description aiming at single well productivity prediction and the optimization design of perforation aiming at improving the production capacity of oil&gas wells.The permeability estimated by different permeability evaluation methods using different original data variety with the rock state(downhole environment),fluid saturation distribution,fluid flow direction,and the range of the detection medium.This paper focuses on the evaluation technology of the formation permeability by wire-line methods that have been carried out or will be carried out in overseas projects(including some cases),and introduces the permeability evaluation technology of non-wireline methods.The advantages and disadvantages of different permeability evaluation techniques are compared and illustrated,and the development direction of permeability evaluation techniques is given based on field permeability evaluation methods adopted by customers.