摘要
岩石脆性是影响低渗透油藏水力压裂效果的重要因素，越来越受到人们的关注和重视，岩石脆性越强，压裂形戍复杂裂缝网络的可能性就越大，开发效果就越好、利用修正Rick Rickmall法、脆性矿物含量法和岩石抗压强度与抗拉强度比值法3种研究方法计算了长庆油田马岭、姬塬地区储层岩石的脆性指数。利用这3种方法对马岭、姬塬地区储层的总体评价结论一致：马岭地区岩石脆性较强，姬塬和镇北地区岩石脆性中等。
The brittleness of rock is an important factor to influence the effect of hydraulic fracturing in low permeability reservoir, h attracts more and more people＇s attention. With enhancement of the formation rock brittleness, the possibility of forming a complex fissure network by the fracturing increases, leading to better development results. This paper studies calculation of the reservoir rock brittleness index of Maling and Jiyuan regions of Changqing oilfield by using three methods of the modified Rick Rickman, compressive resistance anti tensile strength ratio, and brittle mineral content. The conclusion of overall evaluation on reservoirs in Maling-Jiyuan Area by the three methods is consistent： brittleness of rocks in Maling area is strong, while that in Jiyuan and Zhenbei regions is medium.
关键词
岩石脆性
脆性指数
计算方法
brittleness of reek
brittleness index
ealeulation method
