关键词: 巨厚砾石层, 高研磨性, PDC 钻头复合片, 岩石可钻性, 钻井提速

Abstract: Kuqa foothill zone of Tarim Oilfield is rich in oil and gas resources. However, the ultra-thick conglomerate layer of Kuqa zone, hard-to-control high pressure salt layer and ultra-hard and highly abrasive pay zone severely impact drilling time and cost. To solve the bottlenecks of drilling performance improvement in Kuqa foothill zone of Tarim Basin, Houston research center and Tarim Oilfield jointly launched a technological project to focus on the rock drillablity of the pay zone and analyze the drilling bits used on the field. Based on appraisal and optimization of cutter, specific design of bit and the test-modification-retest efforts on the field, a series of technologies focusing on bit application and drilling performance improvement have been developed at last with independent intellectual property rights, making a significant technological breakthrough in this area and breaking the technological monopoly of foreign drilling bit manufacturers.