A Study On Technology Of Well Pattern Infill Or Adjustment Base On Streamline Simulation In YuShulin Oil Field

The main reservoir of FuYang oil layer is second and third types in YuShulin Oil Field, the main well pattern is square inverted nine spot. Now, it can establish effective displacement between oil and water wells in second type block, and gets effect gradually. While, the physical properties of third type of reservoir is more poor, and the development degree of crack is different from each other, which led to high output in early stage but fast reduce progressively. Then, it is difficult to build an effective displacement between oil and water wells, leaving a large remaining geological reserves. In order to excavate potential of encryption further in YuShulin oil field, to do a better job of development and adjustment, and to enhance the ultimate recovery, we need to launch a theoretical study on technology of well pattern infill, form a scheme of pattern infill that is directed against the well pattern and reservoir characteristics in YuShulin oil field now.In this paper, through the analysis and evaluation on the encrypted test block for its encryption and effect, using streamline simulation method, we give the encryption adjustment scheme and get out the conclusion:The second type block under 300m well spacing can establish displacement; For well pattern of the second type reservoir that is linear water injection, the best method is advisable to turn to injection well and encrypt before the comprehensive water cut by 20%, for others, it’s better to encrypt when the overall water cut of blocks is 30-40%; For the third type of reservoir, the encryption should be given at early stage; We proposed the principle of well pattern infill or adjustment based on streamline; By establishing the seepage flow model of the second and third type reservoir, we establish the optimum well pattern encryption of homogeneous and anisotropic reservoir under different line-seam angle.