延长油田垂直裂缝井试井解释模型  

Well Test Interpretation Model For Vertically Fractured Wells in Yanchang Oilfield

作　　者：李卫东[1] 吴亚芳[1] 张克瑞[1] 高飞虎[1] 

机构地区：[1]延长油田股份有限公司定边采油厂,陕西定边718600

出　　处：《辽宁化工》2017年第3期288-290,共3页Liaoning Chemical Industry

摘　　要：延长油田油气资源丰富,但多为低渗致密油气藏,储层具有应力敏感性,并且流体在地层中的流动为非达西流动,需要克服一定的启动压力梯度。低渗油层的主要增产措施为水力压裂,在地层中形成垂直裂缝,效果明显。本文针对低渗油层的非达西流动,引入渗透率模数表示地层的应力敏感性,建立考虑井筒存储和表皮系数的垂直裂缝井的双线性流模型,采用Newton-Raphson方法进行求解,绘制压力和压力导数的双对数曲线,并分析各参数对曲线的影响。。Oil and gas resources in Yanchang oilfield are very rich, but most of they are low permeability tight reservoirs. The reservoirs have the stress sensitivity, and the fluid flow in the formation is non-Darcy flow, the threshold pressure gradient need be overcome. The main measure to increase production of low permeability reservoir is hydraulic fracturing to form vertical fractures in the formation, and the effect is obvious. In this paper, aiming at the non-Darcy flow of low permeability reservoir, the permeability modulus was introduced to indicate the stress sensitivity, the double linear flow model of vertical fractures was established considering wellbore storage and skin factor, and the model was solved with Newton-Raphson method, the double logarithmic curve of pressure and pressure derivative was drawn, and the effect of various parameters on the curve was analyzed.

关 键 词：低渗 垂直裂缝 双线性流 试井 

分 类 号：TE122[石油与天然气工程—油气勘探]