中国石油勘探 ›› 2020, Vol. 25 ›› Issue (1): 147-156.DOI: 10.3969/j.issn.1672-7703.2020.01.014

• 工程技术 • 上一篇    

基于动态地质储量计算的海上油田滚动开发评价思路及实践

彭小东, 汪新光, 李浩, 何志辉, 朱定军, 卢艳, 宋光泽, 张华, 李标   

  1. 中海石油(中国)有限公司湛江分公司
  • 收稿日期:2018-09-05 修回日期:2019-12-02 出版日期:2020-01-15 发布日期:2019-12-31
  • 基金资助:
    国家科技重大专项“大型油气田及煤层气开发”(2016ZX05024-006)。

Evaluation Method and Practice of Progressive Development of Offshore Oilfields Based on Dynamic OOIP Calculation

Peng Xiaodong, Wang Xinguang, Li Hao, He Zhihui, Zhu Dingjun, Lu Yan, Song Guangze, Zhang Hua, Li Biao   

  1. Zhanjiang Branch of CNOOC Ltd
  • Received:2018-09-05 Revised:2019-12-02 Online:2020-01-15 Published:2019-12-31
  • Supported by:
     

摘要: 海上油田由于探井、评价井有限,部分油藏储量边界不落实,导致开发评价井或调整井实施存在较大的风险。为了降低实施风险,提出了基于动态地质储量计算的海上油田滚动开发评价思路,即通过生产数据计算动态地质储量,对静态地质储量进行诊断,对储量边界进行再落实,进而指导储量复核算和开发评价井、调整井部署与实施。为了提高动态地质储量计算的精度,根据所需参数的不同和方法的适应性差异,优选了物质平衡法、现代产量递减法和水驱曲线法建立动态地质储量计算方法体系。引入了结合水侵量计算的视储量线性物质平衡法,提出了考虑有限封闭水体的现代产量递减法。参考“7.5”法,建立了南海西部海域甲型水驱曲线计算动态地质储量的区域公式,优选了俞启泰型水驱曲线,用以计算南海西部的可动油储量和技术可采储量。该思路在南海西部海域取得了较好的实践效果,指导了该类油藏的储量复核算,推动了滚动开发和调整挖潜,降低了开发评价井和调整井的实施风险。

 

关键词: 滚动开发, 动态地质储量, 物质平衡法, 现代产量递减法, 水驱曲线法, 海上油田

Abstract: Due to the limited number of exploration wells and appraisal wells in offshore oil fields, the reserve boundaries of some reservoirs are difficult to prove, which leads to heightened risk in deployment of development appraisal wells or adjustment wells. In order to reduce risk, an evaluation method for progressive development in offshore oilfields, based on dynamic OOIP calculations, is proposed. The method is to calculate dynamic OOIP based on production data, re-check static OOIP, re-define reserves boundaries, and then guide the re-calculation of reserves and the deployment and drilling of development appraisal wells and adjustment wells. In order to improve the accuracy of dynamic OOIP calculations, according to the different parameters and the adaptability of the methods, the material balance method, the modern production decline method, and the water drive curve method are all selected to establish the method system for dynamic OOIP calculation. The linear material balance method for apparent reserves combined with water influx calculation has been introduced, and the modern production decline method, with consideration of limited enclosed water bodies, has been proposed. Referring to the "7.5 rule", the regional formula for dynamic OOIP calculation with Type A water drive curves in the western South China Sea has been established. The Yu Qitai Type water drive curve has also been selected to calculate movable OOIP and technical recoverable reserves in the western South China Sea. This evaluation method has achieved good practical performance in the western South China Sea, guiding the OOIP re-calculation of this kind of reservoir, promoting progressive development and adjustment of tapping potential, and reducing the risk associated with development appraisal wells and adjustment wells.

中图分类号: