低渗透油藏垂直裂缝井试井评价研究

低渗透油藏渗流环境比较差,采用压裂才能获得好的经济效益.作为评价压裂效果的重要手段,压裂井的试井分析显得尤为重要.但目前对低渗透油藏垂直裂缝井的常规试井解释方法存在拟合速度慢、精度不高等缺点.应用解析试井技术对压裂井进行分析,在解释结果基础上,利用数值试井和试井设计方法验证,可以更加准确的对低渗透油藏垂直裂缝井进行试井评价,得到井的裂缝长度、裂缝导流能力、表皮系数等影响压裂效果的参数.实例结果表明解释结果准确可靠,可以很好的对低渗透油田压后效果进行评价.

Well Testing Evaluation of Vertical Fracture in low permeability reservoir

In low permeability reservoirs, flow environment is very poor; in order to achieve good economic returns the wells are always fractured. As an important means of evaluating fracturing effect, well testing analysis is very necessary for fracturing wells. But fitting precision of present well testing interpretation methods for vertical fracturing wells is not high.Testing technology is us de to well interpret at first and then used numerical well testing and well testing design method to verify interpretation results. This method is fast and accurate. Fracture length, fracture conductivity, skin factor etc can be obtained. An example is given to show that this method's results are accurate, can be well used to evaluate the fracturing wells.