摘要
松辽盆地南部长岭气田下白垩统登娄库组致密砂岩气藏具有储层埋藏深、温度高、物性差、地应力高的特点,采用水平井开发和常规的直井压裂开发均难以实现稳产。为最大限度地增加泄油气面积、提高储层动用程度、提高单井产量,在长深D平2井开展了水平井多级压裂开发现场实践:采用裸眼封隔器滑套10级大规模压裂,优化应用压前小型压裂测试、井下微地震和地面电位法压裂监测技术,对10级人工裂缝方位及几何形态进行实时监测。目前,长深D平2裸眼井多级压裂工艺技术的突破,创造了水平井深层气井压裂级数最多、压裂规模最大、平均砂比最高等3项中石油压裂新纪录,并取得了"生产压力高、产量高"的良好效果。该井压裂施工的成功,表明了水平井应用裸眼完井套管压裂具有明显的技术优势,为类似长岭1号气田登娄库组致密砂岩气藏水平井压裂开发提供了有力的技术保障。
The tight sand gas reservoirs in the Lower Cretaceous Denglouku Formation in the Changling Gas Field,southern Songliao Basin,are characterized by great burial depth,high temperature,bad petrophysical properties,and high in-situ stress,so steady production here is difficult to achieve by either horizontal well development or conventional vertical-well fracturing treatment.Therefore,in order to expand the oil/gas drainage area,improve the producing degree of pay zones,and enhance the per-well productivity,the multi-stage fracturing treatment was carried out on the horizontal well Changshen D2.Ten-stage large scale fracturing treatment was performed by use of external packer.The azimuth and geometry sizes of hydraulic fractures were real-time monitored through small pre-frac tests,downhole micro-seismic monitoring,and the electric potential.As a result,the horizontal well Changshen D2 has achieved good consequence with high productivity under high production pressure,by which three records have been set up in the PetroChina's history: the most multiple stages of deep fractured horizontal wells,the largest scale of per-well fracturing treatment,and the largest degree of single stage fracturing treatment.This achievement shows that this frac treatment by use of open-hole completion casings in horizontal wells has obviously comparable advantages,providing robust technical support for such frac treatment in the Denglouku Formation tight sand gas reservoirs in the Changling-1 Gas Field.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2011年第6期46-48,125-126,共3页
Natural Gas Industry
关键词
松辽盆地
长岭气田
早白垩世
致密砂岩气藏
水平井
多级压裂
实践
Songliao Basin,Changling Gas Field,Early Cretaceous,tight sand gas reservoir,horizontal well,multi-stage frac,practice
