中文摘要：

目的探讨镇泾5井区长81油藏单井产能差异的原因。方法在油藏地质特征研究的基础上，从单井含油性的差异、沉积环境、成岩演化作用和自生矿物成分、压裂改造效果、重复压裂、早期注水等方面进行系统分析。结果地质及工程因素影响了长81油藏单井产能。结论为了提高单井产能，需要深化压裂机理及工艺研究，开展储层预测和早期注水等工作。

英文摘要：

Aim To probe into the cause of single-well productivity difference for Chang 81 oil reservoir of ZJ5 wellblock. Methods Based on the research for the oil reservoir geological characteristics, single-well productivity are discussed, through which the single-weU oil-bearing, sedimentary environment, diagenetic evolution of the role and authigenic minerals compositions, fracturing effect, repeated fracturing, early injection, etc. , systematic analysis of the well productivity reasons for the differences. Results Geological and engineering factors affect the Chang 81 reservoir single well production capacity. Conclusion It was proposed to carry out reservoir prediction, fracturing mechanism and process research and the early water injection to improve well productivity.