石油学报 ›› 2018, Vol. 39 ›› Issue (1): 109-115.DOI: 10.7623/syxb201801010

• 油田开发 • 上一篇    下一篇

降低页岩油气瞬态流分析多解性的控制方法

陈岭, 白玉湖, 陈桂华, 徐兵祥, 冯汝勇   

  1. 中海油研究总院 北京 100028
  • 收稿日期:2017-02-26 修回日期:2017-10-31 出版日期:2018-01-25 发布日期:2018-03-09
  • 通讯作者: 陈岭,男,1989年5月生,2012年获中国石油大学(华东)学士学位,2015年获中国石油大学(北京)硕士学位,现为中海油研究总院工程师,主要从事非常规油气生产动态数据分析及数值模拟工作。Email:chenling10@cnooc.com.cn
  • 作者简介:陈岭,男,1989年5月生,2012年获中国石油大学(华东)学士学位,2015年获中国石油大学(北京)硕士学位,现为中海油研究总院工程师,主要从事非常规油气生产动态数据分析及数值模拟工作。Email:chenling10@cnooc.com.cn
  • 基金资助:
    中海石油(中国)有限公司综合科研项目(YXKY-2015-ZY-03)资助。

Controlling method for reducing multiple solutions in shale oil-gas rate transient analysis

Chen Ling, Bai Yuhu, Chen Guihua, Xu Bingxiang, Feng Ruyong   

  1. CNOOC Research Institute, Beijing 100028, China
  • Received:2017-02-26 Revised:2017-10-31 Online:2018-01-25 Published:2018-03-09

摘要: 瞬态流分析(RTA)方法是一种通过生产数据快速评价页岩油气藏储层渗透率、压裂裂缝半长、SRV体积、可采储量和EUR等参数的分析方法。在对页岩油气田实际数据的分析时,由于动态数据的不规则、理论不完善等原因,使瞬态流分析结果具有较大的不确定性,这会造成对井的生产状态判断产生错误,从而对开发策略的制定造成误导。针对瞬态流分析过程中容易出现多解、错解的问题,从优化解释方法和完善解释理论进行研究,提出了线性流分析-解析模型拟合约束求解方法和复合线性流解释方法,以提高解释结果的可靠性。这2种方法在实际区块典型井的分析中应用效果良好,解释渗透率与测试渗透率基本一致,部分生产井压裂裂缝半长小于设计井距,并可根据分析结果在局部进行井网加密调整。

关键词: 页岩油气, 瞬态流分析, 线性流, 复合线性流, 多解控制

Abstract: Rate transient analysis (RTA)is a type of theoretical analysis method to quickly evaluate the parameters of shale oil-gas reservoirs including the permeability, hydraulic fracture half-length, SRV volume, recoverable reserves and EUR based on production data. When analyzing the actual data of a certain overseas shale oil-gas field, due to the irregular dynamic data and imperfect theory, a great uncertainty exists in RTA results. This will cause errors in the judgment of well production state, thus misleading the formulation of development strategies. Aiming at the problems of multiple solutions and false solutions easily appearing in the process of RTA, a research was conducted in terms of optimizing interpretation method and perfecting analysis theory in this study, and two methods were proposed, i.e., the constrained solution method including linear flow analysis and analytical model fitting and compound linear flow interpretation method, which can improve the reliability of interpretation results. Moreover, the two methods showed good application effect in analyzing the typical wells of a certain shale oil-gas block, of which the interpretation permeability was basically consistent with test permeability. On this basis, it was found that the hydraulic fracture half-length of some producing wells was less than the designed well spacing, so that well pattern infilling could be locally adjusted according to analysis results.

Key words: shale oil and gas, rate transient analysis, linear flow, compound linear flow, multiple-solution controlling

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