摘要
应用大量烃源岩和储集层测试数据，结合测井与地震研究成果，系统地研究了吐哈盆地侏罗系七克台组致密油有利区的分布和致密油形成的地质条件。结果表明，致密油储集层主要分布在七克台组上段，在台北凹陷大面积分布，厚度一般30-130m．岩性以灰质白云岩、暗色泥岩和泥灰岩为主，普遍发育构造缝、晶间微孔及溶蚀微孔，脆性矿物（石英＋碳酸盐矿物＋长石）平均含量高于65％．致密储集层下伏一套区域稳定分布的半深湖相泥岩，与上覆储集层大面积叠置接触。通过叠合优质烃源岩和致密储集层，预测了致密油勘探的有利地区，甜点区面积约550km。，主要集中在胜北11井-胜北10井-连砂2井周围地区。
The systematic researches of the geological conditions of tight oil of Qiketai formation of Jurassic in Turpan-Hami （Tuha） basin and its prediction of favorable areas are made in this paper based on data from a lot of source rocks and reservoir tests, compared with relat- ed well logging and seismic imformation. The results show that the tight oil reservoir is mainly distributed in the upper section of Qiketai formation and Taibei sag, with thickness of 30-130 m. The lithology is dominated by gray dolomite, dark mudstone and marl, widely devel- oping structural fractures, intergranular pores and dissolved micropores, and the average content of quartz ＋ carbonate ＋ feldspar is over 65%. The underlying hemi-deep lake facies mudstone is regionally stable in distribution, largely contacting with the overlying reservoirs. Through superimposition of the superior hydrocarbon and the tight reservoir, this paper predicts the favorable area for tight oil exploration, with sweet spot area of 550 km2, mainly distributing around Shengbei 11- Shengbei 10-Liansha 2 well area.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2014年第2期168-171,共4页
Xinjiang Petroleum Geology
基金
中石油科技重大专项(2012E-34-08)
