复合射孔及爆燃压裂动态测试数据分析

为了深入研究复合射孔器工作机理,利用高速井下测试仪全面获取了常规、内置式、外套式、爆燃压裂四类射孔/压裂完井工艺的井下动态数据,并结合施工工艺参数对这些数据进行了分析。数据分析显示,四类复合射孔测试的峰值压力在30 MPa~140 MPa之间;压力脉冲持续时间因工作机理不同相差很大:爆燃压裂时间最长为305 ms,常规射孔最短为0.272ms,井下动压作用特性主要取决于复合火药装药量和起爆方式。这些实测数据为建立井下复合射孔动态过程模型和提升复合射孔器性能提供了重要的参考依据。

Data Analysis of Dynamic Testing of Downhole Hybrid Perforating and Deflagration

To deeply study the working mechanism of hybrid perforator, the downhole dynamic data of 4 perforation/fracturing completion technique: conventional perforating,built-in type hybrid perforating,stimgun type perforating,and deflagration fracturing was obtained by using high-speed downhole tester, these data was analyzed combining with the operational process parameters. Data analysis show that the peak pressure of four kinds composite perforation is between 30MPa ~ 140MPa; and pressure pulse duration varied widely because of different working mechanism: deflagration fracturing has the longest event time 305ms, conventional perforating event time is just 0.272ms;the downhole dynamic pressure effect of composite perforator mainly depends on the composite powder charge and blasting methods .These real datas provide an important reference for the establishment of the underground complex dynamic process model and enhancement of composite perforation performance.