大庆低渗透油田薄差油层勘探开发整体压裂优化设计应用与实践

大庆低渗透油田薄差层通过压裂改造可以使油井产能提高,但是不同的压裂方案设计会产生不同的开发效果,造成单井产能、含水率和采出程度都会有差异,影响开发效果。从理论上进行分析研究,系统整体考虑压裂裂缝参数、注采参数和井网布局整体优化组合影响。主要分析了两个方面:一是区块产量与压裂参数之间的影响;二是油井见水时间与不同压裂参数之间的影响。在大庆渗透油田朝521区块和肇60-54井区初步进行了实践与应用,确保油田开发达到了预期目的,获得好的效果。

Optimized Design Application of Whole Fracturing and Practice of E&P for the Thin Oil Layers in Low-permeability Oilfields in Daqing

The production capacity of thin oil layers in Daqing low-permeability oilfields can be increased through fracturing reconstruction, however, due to different fracturing design generally produces different effects, some difference also seen in single-well production capacity, water-containing ratio and exploitation degree, all those will affect the development effect. The optimized design of whole fracturing project is based on theory, and considered systematically about the effect of fracture parameters, injection-exploitation parameters and whole distribution of well network on whole optimization combination. The main analyses include two aspects: (1) the effect of fractured parameters on block production;(2) the effect of different fracturing parameters on time of water occurrence. This method has been applied in Chao 521 and Zhao 60-54 blocks, made a satisfied result and realized the predicted purpose of oilfield development.