Study On The Evaluation Of Development Effect And The Adjusting Countermeasure Of The H Fault-block Reservoir In Hexiwu Oilfield

Since the development of water flooding for 2 years,there has arisen some problems,such as low formation pressure level,increased speed of well water in H fault block oil reservoir of Hexiwu oilfield.In order to solve conflicts and problems in the development of the H fault block oil reservoir,this article focuses on the following research aspects of work.First,making in-depth study on geologic characteristics of the H fault block.Second,conducting comprehensive evaluation of develop effect.Third,analyzing the distribution law of H fault block oil remaining reservoir.Finally,on the basis of comprehensive analysis and evaluation above,this article develops a reasonable adjustment development program,which is expected to better guiding the oil production and maintaining stable production.The paper researches primarily on the geologic characteristics of H fault block oil reservoir,which includes two aspects: reservoir characteristics study and reservoir heterogeneity study of main oil-bearing strata.It is considered that the reservoir is characterized by middle hole and low permeability,which means that the Interlayer heterogeneity is stronger than the areal heterogeneity.The study also showed that high permeability strip exists in the reservoir plane and vertical,which is the main reason for the rapid water flooding.Meanwhile,through the production dynamics analysis and the comprehensive evaluation of develop effect,this paper puts forward clearly that there are some problems in the development of the fault block,such as the unbalanced injection production relationship,the low reservoir pressure level and so on.For the existing problems,the corresponding technical policies are worked out,including determination of reasonable well spacing,reasonable injection production ratio and injector producer ratio.Finally,on the basis of comprehensive analysis and evaluation above,this article develops a reasonable adjustment development scheme,puts forward several adjustments measures of Injection wells,water well transfer,patching holes,fracture.