Superimposed plates of energy curves to enhance oil recovery of carbonate reservoirs
-
摘要: 塔河油田碳酸盐岩油藏是以溶孔、溶洞和裂缝为主要储集空间,裂缝为主要渗流通道,具有埋藏深、非均质性强的特点。前期通过对生产油井动态数据的研究发现,在生产过程中由于地层能量下降等因素,出现地层垮塌、裂缝闭合等现象,导致油井生产后期出现供液不足,并研究出了能量指示曲线来指导生产,取得一定效果。目前塔河油田存在复杂的油水关系以及部分油井井筒异常等情况,前期的能量指示曲线具有一定的局限性。该文对目前的能量指示曲线进行进一步细化研究,将其划分为不同类型,针对不同曲线类型分析了其对应油藏地质原因,通过将其与含水率、注水以及将压力转变为载荷等方式,建立了能量指示曲线叠合图版,可指导更多的油藏类型生产。Abstract: Carbonate reservoirs in the Tahe oil field are composed of dissolved pores, karst caves and fractures, among which the fractures are the main seepage pathways. The reservoirs are deep buried and usually have a strong heterogeneity. The study of pre-production and well performance data indicated that, formations collapsed and cracks closed in production process due to the decrease of formation energy, resulting in insufficient liquid supply during post-oil production. Therefore, we applied energy indicating curves to guide production, and made some achievements. The Tahe wells have a complicated oil and water contact, and some well bores have abnormal conditions, which are restrictive for energy indicating curves. We divided the curves to several different types, and analyzed their corresponding reservoir geological reasons. We also considered water content and water flooding, and converted pressure to load, and finally made a superimposed plate of energy curves to guide production.
-
Key words:
- energy indicating curve /
- superimposed plate /
- carbonate reservoir /
- Tahe oil field
-
[1] 易斌,崔文彬,鲁新便,等.塔河油田碳酸盐岩缝洞型储集体动态连通性分析[J].新疆石油地质,2011,32(5):469-472. [2] 张抗.塔河油田发现及其地质意义[J].石油与天然气地质,1999,20(2):120-124. [3] 鲁新便.岩溶缝洞型碳酸盐岩储集层的非均质性研究[J].新疆石油地质,2003,24(4):360-362. [4] 鲁新便.塔里木盆地塔河油田奥陶系碳酸盐岩油藏开发地质研究中的若干问题[J].石油实验地质,2003,25(5):508-215. [5] 宋美虹.塔河油田4区奥陶系碳酸盐岩潜山油藏储层预测[J].油气地质与采收率,2005,12(4):23-25. [6] 闫相宾,李铁军,张涛,等.塔中与塔河地区奥陶系岩溶储层形成条件的差异[J].石油与天然气地质,2005,26(2):201-207. [7] 修乃岭,熊伟,高树生,等.缝洞型碳酸盐岩油藏水动力学模拟研究[J].特种油气藏,2007,14(5):49-51. [8] 刘向君,梁利喜,成竹,等.裂缝闭合临界流体压力对油气田开发的影响[J].天然气工业,2005,25(10):89-90. [9] 李传亮.油藏生产指示曲线[J].新疆石油地质,2001,22(4):333-334. -
计量
- 文章访问数: 769
- HTML全文浏览量: 55
- PDF下载量: 265
- 被引次数: 0