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针对杏9-丁1-更338井在钻井过程中出现的复杂情况,综合完井电测曲线特征,确定该井区在SⅢ4-SⅢ7存在异常高压。本文从测井原理入手分析了异常高压对完井电测曲线中微电极、自然电位曲线的影响;从基础井网、一次加密井网钻井和完井电测曲线的正常显示到更新井钻井及完井电测曲线出现的异常显示分析了异常高压形成的时间;从注水井套损、注采关系、地下砂体的发育情况分析了异常高压形成的原因和分布范围。通过以上原因分析和论述对油田开发中预防套损、减少层间和平面矛盾起到了借鉴作用,从而为更好地开发油田、减少钻井过程中出现复杂情况奠定了基础。
In view of the complicated situation during the drilling of Xing 9-Ding 1-338 well, the characteristics of the well logging curves are integrated to determine the abnormal high pressure in SⅢ4-SⅢ7. In this paper, the effect of abnormal high pressure on the microelectrode and natural potential curve of completion electric measuring curve is analyzed from the principle of logging. From the normal display of basic well pattern, once-encrypted well patterning and completion well measuring curve to renewal well drilling and The anomaly of completion curve shows the formation time of anomalous high pressure. The causes and distribution of anomalous high pressure are analyzed from the casing damage, injection-production relationship and the development of underground sand body. Through the above analysis and discussion of oil field development in the prevention of casing damage, reducing inter-layer and plane contradictions have played a reference role, which in order to better the development of oil fields and reduce the complexity of the drilling process laid the foundation.