渤海X油田疏松砂岩密闭取心常见问题及应对措施

A brief analysis of the common problems and solutions of sealed coring technology of loose sandstone in the X oil field in Bohai Sea,China

密闭取心是直接跟踪对比水淹过程中储层岩性、物性、含油性变化的重要技术手段,是油田水淹层评价的最有效方法,取全取准密闭取心资料是后期科学准确研究的前提和关键。针对渤海X油田疏松砂岩密闭取心作业中常出现的问题,从卡准取心层位、提高岩心收获率和密闭率等方面分析并提出相关举措,在F井连续密闭取心作业中成功应用,达到了卡准目标砂体,岩心收获率100%、密闭率100%的目标。

The sealed coring is an important technical means to directly record and compare the changes of reservoir lithology,physical properties and oil content duringflooding,and it is the most effective method to evaluate waterflooded layers in oilfield,obtaining complete and true sealed core data is a prerequisite and key for scientific and accurate research in the later stage.This article analyzes and proposes relevant measures to the common problems in the sealed coring operation of loose sandstone in the X oil field in Bohai Sea,including accurate coring layer determination,improving core recovery rate and sealing rate.It has been successfully applied in the sealed coring operation of well F in the X oilfield,achieving the goal of accurate target layer,achieving 100%core recovery rate,and 100%sealing rate.