›› 2014, Vol. 35 ›› Issue (1): 1-1.

• 论文 •    

裂缝对阳霞凹陷迪北阿合组致密砂岩气藏形成的作用

易士威1,李德江1,杨海军2,李勇2,林潼1,叶茂林2   

  1. (1.中国石油勘探开发研究院廊坊分院,河北廊坊065007;2.中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000)
  • 出版日期:2019-01-01 发布日期:1905-07-10

Effect of Fractures on Forming Dibei Tight Sandstone Gas Reservoir of Ahe Formation in Yangxia Sag of Tarim Basin

YI Shiwei1, LI Dejiang1, YANG Haijun2, LI Yong2, LIN Tong1, YE Maolin2   

  1. (1.Langfang Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Langfang, Hebei 065007, China; 2.Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000,China)
  • Online:2019-01-01 Published:1905-07-10

摘要: 塔里木盆地阳霞凹陷侏罗系阿合组为大型辫状河三角洲沉积,辫状河道形成的厚层砂体在纵向上交错叠置,横向上交错连片,以低孔、低渗为特征的储集层在空间上大面积分布。野外及岩心观察、镜下鉴定以及成像测井均表明,阿合组砂岩裂缝十分发育,迪北气藏具有典型的裂缝性致密砂岩气藏特征。裂缝的发育对致密砂岩天然气的成藏具有十分重要的控制作用,主要表现为:降低起始充注压力,形成优势充注;形成网络充注通道,提高天然气充注效率;提高致密砂岩渗透率,增加含气饱和度;增加了孔隙空间,扩大了储量规模。

Abstract: Ahe formation of Jurassic is a large braided river delta deposit in Yangxia sag in Tarim basin. The thick sand bodies of braided river channel occur in shape of longitudinal overlapping and lateral cross connecting, and the low?porosity and low?permeability reservoir is extensively distributed in this area. The field survey, core observation, microscopic identification and imaging logging show that the fractures in the Ahe sandstone are well?developed. Dibei gas reservoir in this sag has the characteristics of a typical fractured tight sandstone gas reservoir. The fracture development has very important controlling effect on such a gas accumulation, including reducing initial charging pressure, forming advantageous charging, shaping network charging channels, improving the efficiency of gas charging, enhancing tight sandstone permeability, increasing gas saturation and pore space as well as enlarging the size of the reserves

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