厚层块状稠油油藏产量劈分方法研究

Study on production split in thick massive heavy oil reservoir

针对厚层块状稠油油藏蒸汽吞吐的开发特征,在动态分析以及区块测试资料解释的基础上,深入分析油层动用范围随蒸汽吞吐周期变化的规律,并采取基于油井加热体积的新型产量劈分方法,对油藏的剩余油分布状况进行研究。在辽河油田冷41块的应用实践表明,该产量劈分方法既符合稠油热采蒸汽吞吐开发方式,又适应厚层块状油藏地质特征。该方法精确、实用,可信度较高,为类似油藏剩余油分布研究提供了一定的借鉴。

In accordance with the characteristics of cyclic steam stimulation in thick massive heavy oil reservoirs, this paper deeply analyzes the change of reservoir producing range with the cycles of steam stimulation on the basis of dynamic analysis and testing data interpretation. A new production split method based on the heated volume of oil well is used to study the distribution of residual oil. The application of production split method in Block Leng41 of Liaohe oilfield indicates that it fits both cyclic steam stimulation of heavy oil and the geological characteristics of thick massive reservoirs. This method is accurate, practical and reliable, and is a reference for the study of residual oil distribution in similar reservoirs.