Study On Evaluation And Optimization Of Oilfield Stimulation

It is necessary to implement oilfield stimulation in the mid and late period of the oilfield exploitation. In recent years, with the continuous development of oilfield, there are many consequences that the major oilfield have to accept as the high degree of oil extraction, the sharp increase of water content, the small thickness and the low level of the abundance of the remaining recoverable reserves, the relatively low abundance of new reserves replacement, and the decrease of the interests of oilfield. So how to configure programs of stimulation reasonably, how to improve efficiency and effectiveness of oilfield stimulation and how to get greater interests under the pressure of deteriorating geological conditions and funding tight become the major problem which major oilfield companies have to face. So studying on evaluation and optimization of oilfield stimulation is necessary.Based on the analysis of the development procedures of oilfield and the development status in mid and late period, the necessarity of the implement of oilfield stimulation was indicated firstly, and the main problems about implement of oilfield stimulation were summarized in the paper. Secondly, the current oilfield stimulation was briefly explained, and the shortcomings of the traditional evaluation methods were pointed by analyzing the traditional evaluation methods of the effect of oilfield stimulation. As a result, DEA was introduced into evaluating on the effect of oilfield stimulation and then evaluation index system and evaluation model were established,and also the evaluation solution which is based on the case analysis of one well in Ying13 block of Shengli oilfield was achieved. Finally, from the point of view on optimizing the oilfield stimulation in one block, the optimization model of oilfield stimulation was established, then Ying26 block of Shengli oilfield was chosen to institute the application of this model, and then the indemnificatory advices on the optimization of oilfield stimulation were given.