红台气田属低孔、特低渗气藏,具有非均质性强,纵向含气砂体叠置率高的特点,如采用前期成熟分压2层压裂管柱,完成5层压裂,需多次压井,施工周期长、储层伤害大,增产幅度有限问题,为此开展了适合红台气田分压5层管柱研究和试验,即采用3级Y241+1级Y221封隔器组合,采用投球打开喷砂器进行加砂施工,放喷结束后,逐级解封封隔器,分段解封管柱,下入生产管柱。该管柱分别在红台两口井开展了先导性试验,均顺利完成施工,增产效果良好。

The utility model discloses a five-layer layered compression fracture technology pipe column capable of mechanical isolating and progressive unpacking, which progressively unpacks, fishes by sections, and meets the requirement of layered compression fracture of five layered sections with one pipe column; the pipe column performs the layered compression fracture of five layered sections at one time, after the blowout is finished, the pipe column is directly uplifted, so as to progressively unpack the packer; by taking into consideration of the size of the unpacking additional force, directly lifting out the pipe column or sequentially lifting out the pipe column by sections is adopted, so that the pipe column is prevented from being jammed by the sand and the over-big unpacking force is prevented, as a result, the five-grade unpacking of the packer and the jamming difficulty of the compression fracture pipe column are solved, and the purposes of safety work, well workover time saving, and reservoir stratum damage reduction are achieved.

The new model DST straddle perforation and testing combination technique is a comprehensive testing method to conduct perforation and test to destination zone with straddle ways which uses two packers without setting bridge plug or injecting cement plug to isolate bottom layers. The features of that sequence of zones being operated can be selected at random and reducing quake system and releasing equipment for instantaneous high pressure caused by donating guns can protect down hole tools effectively can raise testing efficiency and reduce its cost.

老井、疑难地层复查试油前必须进行特殊处理作业,吐哈油田在实践中初步形成了一套老井复查试油工艺技术,包括钻塞、封堵、打捞、固井、浅层测试、探边测试、油气层改造等,先后对15口老井24个地质层进行了复查试油,均获得了新的发现.