摘要
致密油藏渗透率极低,常采用体积压裂水平井改造技术。由于关井期间不稳定流持续时间长,因此Blasingame产量递减分析是获取储层参数较为实用的方法,该方法可结合生产期间的资料获取储层参数。为此该文建立和求解了致密油藏体积压裂水平井不稳定渗流数学模型,通过定义无因次产量、无因次产量积分及无因次产量积分导数,绘制了体积压裂水平井的Blasingame产量递减典型曲线,将其划分为改造区线性流阶段、窜流阶段、衰竭流阶段、未改造区线性流阶段和边界控制流动阶段,并对裂缝导流能力、改造区宽度、未改造区与改造区渗透率比等参数进行了敏感性分析,为致密油藏生产动态分析提供科学依据。
Due to the extremely low permeability,multi-fractured horizontal well is applied in tight reservoir.As transient flow lasts for a long time during the shut-in,Blasingame production decline analysis is a more practical way to obtain reservoir parameters,which can be obtained by combining production data.A transient flow model for multi-fractured horizontal well in tight reservoirs is established and solved.Blasingame production decline type curves are plotted through defining dimensionless rate function,dimensionless rate integral function and dimensionless rate integral derivative function.The type curves can be divided into linear flow in stimulated reservoir volume(SRV)area,inter-porosity flow period,pseudo-steady flow of transition area,linear flow in unstimulated area and boundary effect flow period.Sensitivity of fracture conductivity,half width of SRV and ratio of permeability of the unstimulated area to permeability of SRV area is analyzed.The results can provide scientific basis for production data analysis of the tight reservoirs.
作者
尹洪军
袁鸿飞
付春权
邢翠巧
徐国涵
YIN Hong-jun;YUAN Hong-fei;FU Chun-quan;XING Cui-qiao;XU Guo-han(Department of Petroleum Engineering,Northeast Petroleum University,Heilongjiang Daqing China 163318;Key Laboratory of Enhanced Oil Recovery(Northeast Petroleum University),Ministry of Education,Heilongjiang Daqing China 163318)
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2020年第2期194-200,共7页
Chinese Journal of Hydrodynamics
基金
国家科技重大专项项目(2017ZX05071005)
黑龙江省自然科学基金项目(E2016015)。
关键词
体积压裂水平井
产量递减
典型曲线
敏感性
multi-fractured horizontal well
production decline
type curves
sensitivity
