冀东油田J13区产量递减规律及影响因素分析

Analysis of Production Decline and Influence Factors in Jidong Oilfield J13 Area

针对冀东油田J13工区的生产特点、开发现状,结合油田的油藏地质和开发特征,对区块生产数据以不同时间单位进行了全面的产量变化规律分析,分析递减状况得出了该区块的递减规律、递减率影响因素及敏感性。应用不同递减分析方法和产量变化拟合方法,计算不同区块的拟合公式,并确定各区块的递减类型、递减率。对产量递减不明显的区块应用双对数模型生长曲线法、威布尔增长曲线等方法进行拟合分析,得出产量变化规律;同时对各区块的产量进行预测分析。提出了切实可行的延缓递减技术对策,并形成延长特低渗透油藏产量递减规律研究思路和技术方法。

Focused on the production characteristics and its current development status in Section J13 of Jidong Oilfield and combined with the reservoir geological characteristics and its development characteristics,a comprehensive analysis on the output vary regularity in a different unit of time with data has been carried on.The factors affecting the output decline regularity / rate / sensitivity can be obtained. By using different methods of decline analysis and output variation fitting,the fitting formula of different sections can be calculated to determine the decline type and decline rate of different sections. The bi- logarithm model growth curve method and Weibull growth curve method is adopted to the sections where the output declined is not so apparently and obviously. Having been analyzed,the vary regularity in the production output concluded,meantime,predicting the output of different sections as well. The technical counter- measures for retarding and postpone the progress of the output decrease are put forward,and the ideas and methods of the extension of the extra-low permeability reservoirs production are formed.