浅谈川中试油工艺技术

FORMATION TESTING TECHNOLOGY IN CENTRE SICHUAN

川中地区主产油层为大安寨,次为凉高山;主产气层为雷一1,嘉二,次为香四、香六,均为"低渗薄油气层",储集空间主要是孔隙型和孔隙裂缝型。通过射孔和酸化技术在现场的应用和不断完善,使射孔工作处于可控的领先状态,采用深穿透射孔弹解除近井地带的"侵入堵塞";深穿透技术和酸化技术复合措施有效解除裂缝储层的深部堵塞:油层灰岩的乳化酸酸化,气层白云岩低渗层胶凝酸酸化以及射孔测试联作工艺、射孔酸化联作工艺、射孔加砂联作工艺的应用有效地连通了地层孔隙和裂缝,打通了油气运移的通道。

The principal oil producing zones in the centre Sichuan oil & gas field are Daanzhai and Lianggaoshan,in which the principal gas producing zones are L11 and Jia2,Xiang4 and Xiang6.All of these are 'thin hydrocarbon reservoirs with low permeability',and pore and porous fractures are the main producing zone.The application of perforation and acidizing technique were perfected constantly,the perforation operation is effectively controlled.The 'invasion plugging' around the immediate vicinity of wellbore could be released by using deep perforating charges.The combined operation of deep perforation and acidizing technique could effectively resolve deep blocking in the fractured zone,such as acidization of the emulsified acid in limestone reservoirs,acidization of jelling acid in low-permeable dolomite reservoir and combined operations of perforating-testing,perforating-acidizing,perforating with sand,with the treatments and techniques above,formation pores and fractures could be effectively connected.