CAJ | 학술논문

苏里格气田是中国典型的低渗透致密气藏，针对沙漠地形地貌特征，结合区域水文特征和现有压裂技术与作业条件，立足配套技术改进和生产组织模式优化，建立了一种适合苏里格气田特点的大井组“工厂化”压裂作业方法。方法由5部分组成：①集中供水模式（单井场水源井直供+井场“人工湖”储水）；②高效压裂工艺（直井套管滑套压裂和水平井裸眼封隔器压裂两种成熟高效的多层多段压裂技术）；③流水线作业模式（通洗井、射孔等六大流程批量化作业）；④高效作业设备；⑤返排液回收再利用。“工厂化”作业缩短了压裂准备和作业周期，并缓解了作业环保压力。现场试验11个井组，42 d内完成14口井、67层/段压裂作业，缩短井组压裂作业周期50%以上，取得了较好的提速效果。图12表2参14
소리격기전시중국전형적저삼투치밀기장，침대사막지형지모특정，결합구역수문특정화현유압렬기술여작업조건，립족배투기술개진화생산조직모식우화，건립료일충괄합소리격기전특점적대정조“공엄화”압렬작업방법。방법유5부분조성：①집중공수모식（단정장수원정직공+정장“인공호”저수）；②고효압렬공예（직정투관활투압렬화수평정라안봉격기압렬량충성숙고효적다층다단압렬기술）；③류수선작업모식（통세정、사공등륙대류정비양화작업）；④고효작업설비；⑤반배액회수재이용。“공엄화”작업축단료압렬준비화작업주기，병완해료작업배보압력。현장시험11개정조，42 d내완성14구정、67층/단압렬작업，축단정조압렬작업주기50%이상，취득료교호적제속효과。도12표2삼14
Sulige gas field is a typical low-permeability reservoir in China. According to desert landform features along with the regional hydrologic feature and the existing fracturing technology and operational conditions, a factory-like fracturing method suitable for Sulige gas field is established to improve techniques and production organization. This method includes five key parts:(1) centralized water supply mode (water source well supply+artificial lake storage);(2) highly efficient fracturing process (two mature multi-stage fracturing technologies, sliding sleeve fracturing for vertical wells and open-hole packer fracturing for horizontal wells);(3) pipeline operation mode with seven procedures, including well drift and flushing perforation etc;(4) high efficiency operation equipment;(5) recovery of fracturing flow-back fluid. This method shortens the preparation and operation period of fracturing treatment and also relieves the pressure on environment. Pilot tests were carried out in 11 well groups in total. Sixty-seven stages of fracturing in 14 wells were successfully completed within 42 days, representing a reduction of fracturing operation cycle of more than 50%, and an encouraging improvement in efficiency.