XJ油田薄层测井资料组合校正及开发实践

Combination correction of log data and development practice in thin reservoirs,XJ oilfield

XJ油田处于特高含水开发后期,产量递减迅速,增产挖潜面临巨大挑战,急需后备储量的接替。由于该油田内部普遍发育砂泥薄互层,因此,难以对薄砂层进行准确评价,限制了这类储层的开发。分析了围岩-层厚、泥质含量和泥浆侵入对直井薄层测井解释结果的影响,提出利用一套组合校正技术对XJ油田薄层测井曲线进行高分辨率处理并重新评价薄层;以此为基础针对薄油层设计了水平井井位,实施后取得了良好的油田开发效果,从而为该地区海相薄砂层开发指明了方向。

Been in the late development with ultra-high water cut, XJ oilfield has declined rapidly in produc- tion and been at a great challenge in tapping potentials of production enhancement, and the replacement of backup reserves is needed urgently. Thin interbedded sands and shales occur widely within the oilfield, and it is difficult to evaluate the thin sand beds accurately, which has limited developing these reservoirs. By ana-lyzing the impacts of several factors, such as surroun- ded bed thickness, shale content and mud invasion, on the log interpretation of thin beds in vertical wells, a set of combination correction techniques was used to make a high-resolution processing of the log data and to reevaluate the thin reservoirs in XJ oilfield. Based on the results, some horizontal wells were de-signed for the thin reservoirs, and a good effect of development was gained after drilling these wells, giving the direction of developing the thin marine sand beds in this area.