对油气层损害机理、深井及深水域井的温度敏感性、完井液新技术、解除储集层损害酸化途径及有效提高油气井产量的欠平衡钻井技术等的发展趋势进行综述。水平井、大位移井的主要损害来源是微粒运移、固相堵塞 ;较宽裂缝和灰岩为主的碳酸盐岩的损害因素也主要是固相侵入与堵塞 ;致密天然气层主要因液相 (水与原油 )聚集而损害渗透率 ,损害程度与储集层渗透率、界面张力、表面润湿性、初始含水饱和度的关系极为密切 ;深井和深水域井温度敏感性会导致矿物向水敏性转化、矿物溶解沉淀、润湿性转化及乳化堵塞。介绍了滤饼清除和井眼溶解清理的完井液新技术 ,通过清理将预防与治理相结合 ,储集层渗透率可比原始渗透率提高 40 %。酸化技术成本低、效果好 ,介绍了各类砂岩及碳酸盐岩相应的配方。欠平衡钻井核心技术是选用合理的井眼流体和恰当的负压差 ,介绍了加拿大 1 0 0口欠平衡钻井在后期提高产量的经验。图 1表 2参 47 The development trend of hydrocarbon damage mechanism, temperature sensitivity of well in deep and deep water wells, new technology of wellbore fluid, ways to relieve acidification of reservoir damage, and underbalanced drilling technology to effectively increase oil and gas well production are summarized. The main damage source of horizontal wells and extended-reach wells is particle migration and solid-phase plugging. The damage factors of carbonate rocks with wider cracks and limestone are mainly solid intrusion and plugging. (Water and crude oil) to damage the permeability, the degree of damage is very closely related to reservoir permeability, interfacial tension, surface wettability and initial water saturation. Well temperature sensitivity in deep wells and deep water wells will lead to mineralization Water-sensitive transformation, mineral dissolution precipitation, wettability conversion and emulsion blockage. Introduced a new completion fluid technology for filter cake removal and wellbore dissolution cleanup, combined with prevention and treatment through cleanup, reservoir permeability can be increased by 40% over the original permeability. Acidification technology, low cost, good effect, introduced a variety of sandstone and carbonate corresponding formula. The core technology of underbalanced drilling is the selection of reasonable wellbore fluid and proper negative pressure differential. The experience of increasing the output of Canada’s underbalanced drilling wells in the later stage is introduced. Figure 1 Table 2 Reference 47