摘要
泌阳凹陷安棚深层系属低孔、低渗致密砂岩储集层,但裂缝发育,改善了深层系的储集条件。研究认为裂缝是以张性为主的高角度裂缝和水平裂缝,高角度裂缝是背斜脊部“X”型节理的一组;裂缝改造后的储集层为A类储集层,油气仍储集于基岩孔隙内,裂缝仅增加了平行于其延伸方向的渗透率;裂缝在鼻状构造形变较大的主体部位发育。
The Anpeng deep reservoir in Miyang sag is characterized by a dense sandstone reservoir with low porosity and permeability,but the deep reservoir conditions were improved due to its developed fractures.Study shows that the fractures mainly consist of high-angle fractures and horizontal fractures dominated by tensile stress,of which high-angle fractures are distributed as'X'joint on anticlinal crest;the reservoirs reconstructed by the fractures become Type A reservoirs;petroleum is still remained in pores of basement rock,the fractures only play a part of increasing per-meability in parallel to their extensive directions,and developed in the main part of greater deformation of the nose-like structure.
出处
《新疆石油地质》
CAS
CSCD
2002年第1期30-31,共2页
Xinjiang Petroleum Geology
