青平川油田储层地质特征与注水开发试验-地球科学与环境学报-长安.PDF

第28卷第3期 地球科学与环境学报 Vol . 2 8No . 3 2 0 0 6 年 9 月 　Journal of Earth Sciences and Environment 　 Sept. 2 0 0 6 青平川油田储层地质特征与注水开发试验 刘雪峰 (延长油矿管理局 青平川钻采公司, 陕 延川717200) [摘要] 　通过对岩石矿物、储层物性、油层敏感性和水驱油效果分析, 在储层地质研究基础上, 评价青平川油田 长2 油藏注水开发效果。研究结果表明, 长2 油藏含油砂岩以细粒长石砂岩为主, 粘土矿物中绿泥石含量较高。 储层物性差, 属于典型的低渗透岩性油藏。水驱油实验结果表明, 青平川油田长2 油层水驱油效果较好, 油田最 终驱油效率可达49.4%。先导性注水试验表明, 注水开发可以使青平川油田产量在较短时间内得到大幅度提 高, 在注水后的第4 到第7 个月达到产量高峰期, 第8 个月后进入稳产期。油田注水开发产量递减规律分析表 明初始递减律为0. 019 1(1/月)。根据青平川长2 油藏实际情况, 认为注水开发能达到提高采油速度和油田最 终采收率的目的。 [关键词] 　延长组;低渗透性油藏;油层敏感性;采收率;注水开发 [ 中图分类号] 　P618. 130. 2　[文献标识码]　A 　[文章编号] 　1672-6561(2006)03-004-2 03 Geology Property and Water Injection Production Experiment of Qingpingchuan Oil Field LIU Xue-feng (Q i ngp i ngch uan O i l D r il l ing A nd Prod uci ng Comp any , Yanc hang Oi l B urea u, Yanc huan 717200, Sh aanx i, Ch ina) Abstract:Chang 2 reservoir of Qingpingchuan oil field, located in the eastern Shanbei slope of the Erdos asin, is a typical low penetrability oil reservoir. Fin-e grained feldspar sandstone is the main oi-l bearing rock and chlorite is the dominant kind of clay minerals. Physical property is not nice for oil production because of low porosity and penetrability, how ever experiment of w ater injection show s that it has high w ater injection efficiency which is up to 49.4%. Results show that water injection can largely increase oil production in a short time stage. The peak production can be reached at the 4th to the 7th months after water injection, and the production w ould decrease after the 8th month. The initial production decrease degree of w ater injection is 0. 019 1(1/month). It indic