川东北陆相气藏试气作业储层保护技术

在油气田的勘探开发过程中,只有减少对油气层的损害,才有可能获取更大的综合经济效益。油气层损害是指在油气井钻井、完井、增产措施施工中,各种工作液在井周附近储层中造成的减少油气层产能的现象。而维持储层产能的重要条件是岩石的渗透性,渗透率越高,流体导流能力越高,储层产能越高。因此,保护油气层的核心问题就是如何保持储层的渗透率。川东北陆相气藏埋藏深,储层类型复杂,泥质含量高,勘探作业施工过程中的入井液体与地层流体不配伍,易引起水敏、盐敏、压敏等现象。文中对试气作业施工可能造成储层损害的因素及采取的相应保护措施进行了详细分析,目的在于提高陆相气藏储层保护水平,确保气藏产能得以彻底解放。

Protection Technology of Trial Gas Working Reservoir in Continental Facies Gas Depositin Northeast SICHUAN

In the oil and gas exploration and development process,only to reduce the reservoir of the damage,will it be possible to obtain greater overall economic efficiency.Reservoir damage is defined as oil and gas drilling,completion,stimulation construction,all the working fluid reservoir in the vicinity of the circumferential reduction caused by the phenomenon of reservoir capacity.The capacity to maintain an important condition for the reservoir is the rock permeability,the higher the permeability,fluid conductivity,the higher the reservoir capacity is higher.Therefore,reservoir protection is the core issue of how to maintain the permeability of the reservoir.Northeast continental gas buried deep,complex reservoir type,shale content,exploration operations in the construction process and the formation fluid into the well fluids are not compatible, easy to cause water sensitivity,salt sensitivity,pressure sensitivity and so on.In this paper,the construction of the test gas operating factors can cause formation damage and take appropriate protective measures are analyzed in detail the purpose of enhancing continental gas reservoir level of protection to ensure that gas production can be fully liberated.