理论水驱曲线的提出及其与产量递减曲线的关系探讨  

Proposing of theoretical waterflooding curve and discussion on the relationship between theoretical waterflooding curve and production decline curve

作　　者：张金庆[1,2] 杨仁锋 ZHANG Jinqing1,2 YANG Renfeng2(1State Key Laboratory of Offshore Oil Exploitation,Beijing100028, China 2. CNOOC Research Institute Co., Ltd., Beijing 100028, Chin)

机构地区：[1]海洋石油高效开发国家重点实验室,北京100028 [2]中海油研究总院有限责任公司,北京100028

出　　处：《中国海上油气》2018年第4期86-92,共7页China Offshore Oil and Gas

基　　金："十三五"国家科技重大专项"海外重点油气田开发钻采关键技术(编号:2017ZX05032-004)";中国海洋石油集团有限公司创新基金项目"复杂碳酸盐岩油藏相渗曲线综合分析平台(编号:CNOOC-KY-KJCX-CRI-2017-01)"部分研究成果

摘　　要：水驱曲线法与产量递减曲线法是油气田开发工作者最常用的方法,很多学者致力于两种方法的研究,但仍存在理论研究缺乏以及预测精度有待提高等问题,而且探讨两者内在联系的研究也很少。从相对渗透率曲线和物质平衡原理出发,推导出了理论水驱曲线及产量递减曲线(定生产压差及定液量生产条件下),并对两者的关系进行了分析。结果表明,水驱曲线与产量递减曲线在本质上是统一的,均体现了随着开发的进行,含油饱和度逐渐降低导致油水相对渗流能力的变化,进而体现在开发指标的变化规律上。油田实际生产资料验证了本文理论推导的正确性及两种方法内在的一致性,本文研究成果对深化水驱规律及产量递减规律认识以及提高产量预测精度具有一定的理论价值和借鉴意义。Waterflooding curve and production decline curve are the most commonly used methods for field developers,and attracted many scholars＇ engagement in their study. However,some problems still exist,for example,the theoretical research is still insufficient and the prediction accuracy of needs further improvement. Moreover,there is little research on the internal relationship between these two methods. Based on the relative permeability curve and the principle of material balance,the theoretical waterflooding curve and the production decline curve（under the condition of constant production pressure difference and constant liquid volume production） are deduced,and the relationship between them is analyzed. The results show that the waterflooding curve and the production decline curve are consistent in nature,and they both reflect that as the development proceeds,the gradual decrease of oil saturation leads to the change of the oilwater relative seepage ability,which is shown in the change rules of development index. The correctness of the theoretical derivation and the essential consistency of these two methods are verified by the actual production data of oilfields.The research results in this paper have certain theoretical value and reference significance for deepening the understanding of waterflooding law and production decline law and improving the precision of production prediction.

关 键 词：理论水驱曲线 产量递减曲线 相对渗透率 物质平衡 

分 类 号：TE312[石油与天然气工程—油气田开发工程]