储层边界识别技术在渤海海域油田水平井高效开发中的应用

河流相砂岩油藏是渤海海域油田增储上产的重要组成部分.受区域地质作用,该类油藏构造复杂、储层单层厚度较薄、夹层发育、横向延伸比较局限,这给水平井的高效开发带来巨大困难.通过运用拟波阻抗反演和叠前多参数同步反演技术对主力砂体的空间展布及其物性进行详细研究和描述,同时采用随钻成像测井技术实时提供井眼周围岩性、流体边界的变化,...

The application of reservoir boundary identification in highly efficient development of horizontal wells in Bohai oilfield

The exploration and development of fluvial reservoirs play an important role in increasing reserves and production of Bohai oilfield.Because of the effects of regional geological background,it generally has the following char-acteristics which create more difficulties in highly efficient development of horizontal wells,such as:complicated and fractured reservoir structures,thinner and poor-continuous reservoirs,extensively distributed interbeds,limited horizontal expansion.By using combined technologies of pseudowave impedance inversion,multi-parameter prestack synchronous inversion and image logging while logging,this eventually ensured the success rate of horizontal drilling.Field applications showed these techniques were effective for improving reservoir drilling ratio,which was up to 96.3% for existing horizontal wells;the daily average oil production per well reached 500m3 which was 3 times higher than designed single well production,especially the daily production of Well A5h reached 1100m3/d.Based on this technology,the trajectory of drill bit inside the oil layers was effectively controlled.Meanwhile,it can provide a good reference for efficient development of horizontal wells in the similar composite reservoirs.