生产数据分析在江苏油田岩性油藏中的应用

Application of production data analysis in lithologic reservoirs of Jiangsu Oilfield

江苏油田岩性油藏构造破碎,地震资料差,砂体横向变化快,单纯依靠静态资料难以精确识别砂体边界及断层。试井能够识别油藏边界,但江苏油田储层渗透率低,测试时间长,不能满足生产需要。生产数据分析利用生产数据和流动压力进行分析,因生产时间长,能反映更大范围的流动及边界信息,通过典型递减曲线图版拟合方法计算储层参数,获得地层动态参数,了解油藏边界情况。生产实践表明,生产数据分析与物探、地质相结合,可提高岩性油藏砂体边界刻画精度,有效指导岩性油藏的滚动开发及措施调整,为江苏油田岩性油藏的精细描述和开发提供了一种新手段。

Because there are structure fragmentation,poor seismic data and rapid lateral variation of sand bodies in lithologic reservoirs of Jiangsu Oilfield,it is difficult to be accurately identified the boundary and faults of sand bodies solely by static data.Although well testing can be used to identify the reservoir boundary,it can not meet the needs of production due to the lower permeability of reservoirs in Jiangsu Oilfield and longer testing time.Production data analysis can use production data and flowing pressures of bottom-hole to reflect the flow in a wider range and the boundary information.Using the typical decline curve chart fitting method,reservoir parameters can be calculated to obtain formation dynamic parameters and understand reservoir boundary conditions.Production practice indicate that the combination of production data analysis with geophysical prospecting and geology can improve the accuracy of sand boundary description,effectively guide the rolling development of the lithologic reservoir,and provide a new technical means for fine description and development of lithologic reservoirs in Jiangsu Oilfield.