陇东三叠系低渗透油藏开发井网适应性研究

Adaptability for Selecting Triassic Low Permeability Reservoir Producing Well Patterns in Longdong Oilfield

随着陇东三叠系油藏产建规模的不断扩大,油藏产量已经成为陇东油田开发的主要力量,因此,研究低渗透油田的开发是当务之急,井网适应性研究就是这之中的重要方面。在前人对低渗透油藏井网数值模拟结果的基础上,结合陇东三叠系低渗透油田开发常用的正方形反九点井网和不常用的菱形反九点井网及矩形井网进行分析,研究表明,在陇东低渗透油田开发中,矩形井网在开发中具有明显的优越性。

With the expansion of Triassic reservoir construction scale in Longdong Oilfield,the daily production output in the Triassic reservoir is as high as 3199 t/d,which is 52.2% in the total output of No.2 Factory,the Triassic reservoir becomes the major reservoir in the Oilfield.To develop the low permeability reservoir is the important task at present time,of which the well pattern adjustment is a critical aspect.On the basis of previous study of well pattern simulation on low permeability reservoirs,analysis is made in combination with the square-inversed 9 point well patterns,unconventional modified-inversed 9 point patterns and rectangular patterns for Triassic low permeability reservoir production in Longdong Oilfield.The study indicates that the rectangular patterns are beneficial for developing the low permeability reservoirs in Longdong Oilfield.