2017年4月第36卷第2期
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
DOI10.3969/J.ISSN.1000-3754.2017.02.029
Apr.，2017 Vol. 36 Ne. 2
致密油气藏裂缝介质压力敏感分析与计算方法
孙璐刘月田冯月丽于鹏陈健丁耀
（中国石油大学石油工程教育部重点实验室，北京102249）
摘要：致密油气截裂缝介质的压力敏感性对油气藏开发效果具有显著影响。基于物质守恒理论，通过理论推导建立了基质和裂缝的压力敏感方程；同时，通过开展单条裂缝压力敏感渗流物理模拟实验，研究裂缝变形特征和介质渗透率变化特征，并利用实验结果验证了压力敏感裂缝性介质渗透率模型的合理性。研究表明：建立的基质和裂缝压力敏感方程是关于流体压力的函数，能够解决常规压力敏感方程中变形系数确定困难的间题，增强了压力敏感方程在实际致密油激开发中的适应性。实验中发现流体压力下降，基质块发生膨账使得基质块之间的裂缝闭合，开度变小，介质渗透率变小；流体压力升高时，基质块发生收缩，使得基质块之间裂缝开启，开度增大，介质渗透率变大。对比实验模拟结果与基于实验参数的渗透率模型的计算结果，验证了渗透率模型的合理性。通过研究，揭示了致密油藏裂缝介质的压力敏感变形机理，又为裂缝介质的渗透率表征莫定了基础。
键调：致密油气藏；裂缝变形；压力敏感方程；实验模拟关
中图分类号：TE311
文献标识码：A
文章编号：1000-3754（2017）02-0171-04
PRESSURESENSITIVITYANALYSISANDCALCULATINGMETHODFOR
THEFRACTUREMEDIUMOFTHETIGHTOILRESERVOIR
SUN Lu, LIU Yuetian, FENG Yueli, YU Peng, CHEN Jian, DING Yao
(MOE Key Laboratory of Petroleum Engineering, China Uniwersity of Petroleum, Beijing 102249, China)
Abstract: The pressure sensitivity of the fracture medium in the tight oil and gas reservoir possesses a significant impact on the development effects of the petroleum reservoir. Based on the theory of material conservation, the pressure sensitivity equations of the matrix and fracture were established with the help of the theoretical deduc-tion; as the same time, by means of the physical simulation experiment of the pressure sensitivity percolation for the individual fracture, the fracture deformation and medium permeability change characteristics were studied, and moreover the rationality of the flow model of the pressure-sensitive fracture medium was verified by the experi-mental results stated above. The researches show that the established pressure sensitivity equation for the matrix and fracture is the function of the liquid pressures, this understanding can solve the problem that the deformed co-efficient in the conventional pressure sensitivity equation is difficult to determine, and thus the adaptability of the equation is enhanced in the actual development of the tight oil reservoir. The experiment found that the liquid
收稿日期：2016-05-20
改回日期：2016-07-18
基金项目：国家自然科学基金项目“各向异性裂缝页岩气截渗流机理与理论研究”（51374222）；国家重点基础研究发展
计划“陆相致密油高效开发基础研究”课愿五之专题一“致密油藏产能预测方法”（2015CB250905）。
作者简介：孙璐，女，1988年生，在读博士，从事油藏渗流机理、数值模拟及开发系统工程方面的研究。
E-mail : sunlustudent@ 126. com
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