吴起油田长6超低渗储层伤害机理研究

Research on Damage Mechanism of Chang 6 Ultra-low Permeability Reservoir in Wuqi Oilfield

吴起油田薛岔油区位于鄂尔多斯盆地,油气资源异常丰富,因为此类储层较常规储层特殊,储层在开发中很容易受到伤害。以吴起油田薛岔油区长6油层组超低渗透油藏为主要研究对象,通过对其地质特征和物性的研究以及对储层岩石学、地层流体性质的分析评价,得出研究区岩石类型复杂,储层的主要粘土矿物为长石和方解石,水锁伤害及岩石敏感性损害是研究区储层的主要损害类型。

Xuecha oil zone of Wuqi Oilfield is located in Ordos basin, and has rich oil and gas resources. Because such reservoirs are more special than conventional reservoirs, the reservoir is vulnerable in development. In this paper, taking ultra-low permeability Chang 6 reservoir in Xuecha oil zone of Wuqi oilfield as main research object, through the study of geological characteristics and physical properties as well as the analysis and evaluation of reservoir petrology and formation fluid properties in this area, the rock type, interstitial material type and reservoir damage type in the area were investigated. The results showed that, the rock type in this area was complex, the main clay minerals in the reservoir were feldspar and calcite, water damage and rock susceptibility damage were the major types of reservoir damage.