水平裂缝井试井解释方法及现场应用WELL TEST INTERPRETING METHOD FOR HORIZONTALLY-FRACTURED WELL AND APPLICATION
刘淑芬,赵旭,卢德唐,杨景海
LIU Shufen,ZHAO Xu,LU Detang,YANG Jinghai
摘要(Abstract)：
根据乘积法原理,给出均质各向异性水平裂缝的地层压力分布及井底压力解析表达式。利用这一表达式推导出时间较长时的井底压力渐近表达式。该渐近表达式表明:对于均质无限大地层,当时间较长时,井底压力可用时间半对数来表示。当考虑井筒存储及表皮因子时,可用给出的井底压力的积分解表达式,通过对井底压力积分解的求解,得到考虑表皮及井筒存储时的水平裂缝典型曲线图版。还阐述了水平裂缝井试井解释方法,并将该方法应用在延长油田的水平裂缝井试井解释中,对水平裂缝井作出了合理可靠的解释与评价。
Based on the principle of arithmetic product,the formation pressure distribution and bottom pressure analyzing expression are presented for the homogeneous anisotropy horizontal fractures,the bottom pressure evolution expression at longer time is fetched by the analysis expression.The evolution expression shows that for the homogeneous infinite formation when the time is longer,the bottom pressure can be expressed by time semi-log.Considering the borehole storage and skin factor,the downhole pressure' s integration solution expression can be offered,and then with the help of the solving the value of the above solution,the typical curve board chart of the horizontal fractures is derived.In addition,the well tested data interpreting method in horizontally fractured wells is illustrated and furthermore the method is applied in the well test interpretation for the horizontal fracture wells in Yanchang Oilfield and moreover the reasonable and reliable interpretation and evaluation for the wells are achieved.
关键词(KeyWords)：
油层压裂;水平裂缝;试井解释;图版特征;资料应用
oil reservoir fracturing;horizontal fracture;well test interpretation;chart characteristic;data application
基金项目(Foundation): 国家自然科学重点基金(10932010);; 国家重大科技专项(2011ZX009);; 973项目(2011CB707305)联合资助
作者(Author):
刘淑芬,赵旭,卢德唐,杨景海
LIU Shufen,ZHAO Xu,LU Detang,YANG Jinghai
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