摘要
合理产能的评价对气井生产十分重要,是气田科学长久开发的基础。塔里木油田库车山前超深超高压裂缝性致密砂岩气藏具有基质致密、裂缝发育等特点,渗流特征多表现为裂缝、基质组合的双重介质储层特征,整个流动过程分为裂缝流动、过渡流动以及总系统流动3个阶段。针对目前产能评价方法缺乏针对性的问题,对早期产能对应的均质裂缝流动阶段和过渡阶段及长时间稳产对应的裂缝-孔隙流动阶段产能评价公式进行研究,从理论上建立考虑表皮系数以及高速非达西系数的裂缝-孔隙型双重介质储层气井产能评价公式。通过实例计算表明,该产能公式与产能试井产能计算结果较接近,比常规一点法经验公式产能计算结果更为准确,在超深超高压裂缝性致密砂岩气藏中有较好的适用性。
Reasonable evaluation of production capacity is very important for gas well production.It is the foundation for the long-term development of gas field.The ultra-deep and ultra-high-pressure fractured tight sandstone gas reservoirs in front of Kuche mountain of Tarim Oilfield is characteristic of tight matrix and developed fractures.The seepage characteristics often manifest as the dual-media reservoir features of fractures and matrix.The entire flow process is divided into three stages:fracture flow,transitional flow and overall system flow.In response to the lack of targeted production capacity evaluation methods,the research has been conducted on the early production capacity evaluation formula corresponding to the fracture flow stage,transitional stage and on the long-term stable production capacity corresponding to the fracture porosity flow stage.The production capacity evaluation formula for dual-media reservoir gas wells considering the skin factor and the high speed non-Darcy coefficient has been theoretically established.The examples of calculation show that the result of production capacity formula is closer to the testing production than the conventional point method empirical formula,demonstrating good applicability in ultra-deep and ultra-high-pressure fractured tight sandstone gas reservoirs.
作者
彭鹏
王小培
张永灵
赵博勇
刘兆龙
PENG Peng;WANG Xiaopei;ZHANG Yongling;ZHAO Boyong;LIU Zhaolong(R&D Center for Ultra-deep Complex Reservoir Exploration and Development,CNPC,Korla,Xinjiang 841000,China;Engineering Research Center for Ultra-deep Complex Reservoir Exploration and Development,Xinjiang Uygur Autonomous Region,Korla,Xinjiang 841000,China;Boda Oil&Gas Management Area,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China;School of Earth Sciences,China University of Petroleum,Changping,Beijing 102249,China;Xinjiang Huayou Oil&Gas Engineering Co.Ltd.,Korla,Xinjiang 841000,China;Research Institute of Petroleum Exploration&Development,PetroChina,Haidian,Beijing 100083,China)
出处
《西南石油大学学报(自然科学版)》
北大核心
2025年第6期83-93,共11页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
中国石油科技重大专项(2018E-1803)。
关键词
裂缝
孔隙
双重介质
气井
产能公式
fracture
pore
dual-media
gas well
production capacity formula
