摘要
通过对奥陶系岩溶缝洞型碳酸盐岩稠油油藏性质分析,认为该油藏是一种特殊类型的稠油油气藏,油藏内地下流体在垂向还是横向上均存在不同程度的非均质性.油气储层的严重分隔性造成了油藏性质的复杂化,缝洞控藏造就了不同开发单元地下流体的严重分割和油井产能及动态的差异.奥陶系油藏可能不是整体连片分布,而是不同规模缝洞单元的空间叠合分布.奥陶系的重油绝大部分为普通稠油,但部分井区不排除有特稠油或超稠油,原油敏感温度在40℃～60℃.文章对如何深化奥陶系稠油油藏的研究,加大油藏的储量动用程度,制定合理的开发技术政策提出了一些观点和看法.
Based on the analysis of the features of the karst fissuredcave typed Ordovician carbonate reservoirs in Tahe oilfield, it is considered that Ordovician reservoir is a kind of special heavy-oil reservoir and the fluids in the reservoir have strong heterogeneities both in vertical and lateral. This karst generated reservoir compartmentalization strongly results in the complexity of the reservoir property. Reservoirs that are controlled by fissures and karst caves causes heavily compartmentalization of underground fluids in different development units and the differences of well production behaviors and performances. The Ordovician reservoir may not be distributed as a whole-block, but distributed as different-sized fissure and cave units in overlapped spaces. The fluids in the reservoir is mostly common heavy oil except for extra heavy oil or ultra heavy oil in some wells with sensitivity oil temperature of about 40℃～60℃. Finally some views are presented that how to conduct further study on Ordovician reservoir, how to improve producing reserves extent and how to make optimum technical strategy etc.
出处
《新疆地质》
CAS
CSCD
2003年第3期329-334,共6页
Xinjiang Geology
