能量指示曲线叠合图版提高碳酸盐岩油藏采收率应用研究

Superimposed plates of energy curves to enhance oil recovery of carbonate reservoirs

陈明仁 蒋林 李成刚 程露 刘聪 芦海涛

Chen Mingren Jiang Lin Li Chenggang Cheng Lu Liu Cong Lu Haitao

中国石化 西北油田分公司 采油三厂, 新疆 轮台 841604

No. 3 Oil Production Plant, SINOPEC Northwest Company, Luntai, Xinjiang 841604, China

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。

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.

https://doi.org/10.11781/sysydz2016S1039