有限导流垂直裂缝井测试时间校正系数  

Calibration coefficient of testing time for finite conductivity vertically fractured well

作　　者：邓琪 张宏友 陈晓祺 汪全林 肖波 DENG Qi;ZHANG Hongyou;CHEN Xiaoqi;WANG Quanlin;XIAO Bo(CNOOC Tianjin Branch,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《复杂油气藏》2019年第1期61-63,共3页Complex Hydrocarbon Reservoirs

基　　金："十三五"国家科技重大专项"渤海油田加密调整及提高采收率油藏工程技术示范"(2016ZX05058001)

摘　　要：针对渤海稠油油藏测试出砂,试井曲线出现有限导流特征,导致初期测试产能难以准确校正的问题,利用不稳定渗流力学有限导流垂直裂缝井模型,分析不同时刻不同裂缝特征的测试比采油指数变化规律,得到不同情况下的测试产能时间校正系数。统计发现裂缝长度越长,储层流体的流度越小,对应的时间校正系数越低。在此基础上得到了不同裂缝特征下的时间校正系数公式。实例应用结果表明,所得时间校正系数计算式能更准确校正稠油测试出砂井的初期产能,可用于指导海上稠油油藏的产能评价。Because well testing curve presents finite conductivity features caused by testing sanding, it is difficult to accurately correct the initial testing productivity in Bohai heavy oil reservoirs. Using the finite conductivity vertically fractured well model under the condition of unstable seepage flow, it was analyzed changes in the test specific productivity index of various fracture features and times, and then it was obtained the calibration coefficients of testing time under different conditions. The analysis results indicated that the longer the fracture length was, the smaller the fluidity of reservoir fluid was, and the lower the corresponding calibration coefficient was. On this basis, it was proposed a calibration coefficient formula of testing time under the condition of various fracture features. The application results showed that the new method could more accurately correct the initial testing productivity in heavy oil wells with testing sanding, which could guide the productivity evaluation of offshore heavy oil reservoirs.

关 键 词：稠油油藏 探井 初期产能 有限导流 时间校正系数 

分 类 号：TE328[石油与天然气工程—油气田开发工程]