桥口油田电测资料综合解释与应用

On Integrated Interpretation & Application of Electrolog Data in Qiaokou Oilfield.

桥口油田属于典型的非均质复杂断块油藏 ,经过多年注水开发 ,地下储层的微观孔隙结构、物理化学性质、流体特征及油水分布都发生了变化 ,使Ⅱ～Ⅳ水淹层电性特征不明显 ,很难解释准确。为了解决目前电测解释中经常存在的对地质情况结合不够、受测井系列限制、测井仪器探测范围有限等问题 ,对 3种重要测井资料 (如新井油层、水淹层资料 ,产液剖面和注水剖面资料 )进行综合解释 ,从而降低了电测误差 ,提高了新井投产效率 ,准确地确定出油井生产层系。在桥口油田共进行油水井综合解释 35口 (其中油井 2 6口 ,水井 9口 )。油田最终水驱采收率由 37 7%提高到 40 0 2 %。

Qiaokou oilfield is one typical inhomogeneous reservoir with complicated fault blocks. After years of water injection, the reservoir has greatly changed in micropore structures, physical & chemical properties, fluid characteristics & oilwater distributions. These changes make it even more complicated, and also make the electrical properties of the watered-out layers (Ⅱ～Ⅳ) become too indistinct to interpret correctly. To solve the problems in present electrolog interpretation such as no enough combination of log data with geological data, limitation of logging programs and limited detecting ranges of logging toals, we integratively interpreted three main kinds of logging data from oil and wateredout beds in new wells, producing and absorption profiles, thereby, electrolog errors are decreased, production efficiency of the new wells is increased and production layers are correctly determined. Of 35 wells, 26 oil wells and 9 water wells in Qiaoko Oilfield are successfuly interpreted. The final water drive recovery factor rises from 37 7% to 40 02%.