油气藏评价与开发
油氣藏評價與開髮
유기장평개여개발
2014年
1期
10-15
,共6页
储层特征%长2段地层%下寺湾油田%鄂尔多斯盆地
儲層特徵%長2段地層%下寺灣油田%鄂爾多斯盆地
저층특정%장2단지층%하사만유전%악이다사분지
reservoir characteristic%Chang-2 formation%Xiasiwan oilfield%Ordos basin
以现代油藏描述的理论为指导，运用石油地质学、沉积学、储层地质学等理论与技术方法，对鄂尔多斯盆地下寺湾油田长2段储层特征进行研究。研究表明研究区长2储层碎屑成分以长石岩屑砂岩为主，含少量岩屑石英砂岩，结构成熟度中等。孔隙类型以粒间溶孔为主，粒内溶孔和粒间孔少量。储层物性实测数据表明，长22小层孔隙度多分布在5%~18%，渗透率分布范围为（0.01~4）×10-3μm2，砂岩储层多为低孔特低渗储层。
以現代油藏描述的理論為指導，運用石油地質學、沉積學、儲層地質學等理論與技術方法，對鄂爾多斯盆地下寺灣油田長2段儲層特徵進行研究。研究錶明研究區長2儲層碎屑成分以長石巖屑砂巖為主，含少量巖屑石英砂巖，結構成熟度中等。孔隙類型以粒間溶孔為主，粒內溶孔和粒間孔少量。儲層物性實測數據錶明，長22小層孔隙度多分佈在5%~18%，滲透率分佈範圍為（0.01~4）×10-3μm2，砂巖儲層多為低孔特低滲儲層。
이현대유장묘술적이론위지도，운용석유지질학、침적학、저층지질학등이론여기술방법，대악이다사분지하사만유전장2단저층특정진행연구。연구표명연구구장2저층쇄설성분이장석암설사암위주，함소량암설석영사암，결구성숙도중등。공극류형이립간용공위주，립내용공화립간공소량。저층물성실측수거표명，장22소층공극도다분포재5%~18%，삼투솔분포범위위（0.01~4）×10-3μm2，사암저층다위저공특저삼저층。
Guided by modern reservoir description theories and using theory and technical methods of the petroleum geology, sedi-mentology, reservoir geology, reservoir characteristics of Chang-2 reservoir of Yanchang formation in Xiasiwan oilfield, Ordos ba-sin were studied. The research results indicate that, in the study area, the clastic constituents are mainly the feldspathic litharenite with a little quartzitic litharenite of medium textural maturity. The pore types are mainly intergranular dissolved pore with a little in-tragranular dissolve pore and intergranular pore. Reservoir properties measured data show that the porosity of Chang-22 formation is 5 %~18 % and the permeability of that is (0.01~4)×10-3 μm2. The sandstone reservoirs are mainly the low porosity and extremely low permeability reservoirs.
