In Luliang Oilfield,the injection pressure is high and the injected water volume is low during the oilfield development.It is proposed that a kind of the monolayer solution with cationic group could be used to solve this problem.Monolayers is in aqueous solution as the delivery medium,electrostatic interactionis the driving force,it deposites on the negative power of the rock surface,changes the nature of the surface reservoir,peel water film,prevents clay swelling and migration,thereby it can enhance the penetration of water phase,reduce water pressure,ultimately reduce pressure and augment injection.Laboratory experiments and oilfield application indicate that this technology can be used to increase the ability to absorb water of injection wells in Shinan 21 Area of Luliang Oilfield,improve water injection effect.

Through observing cores and sampling analysis, the development characteristic of high quality hydrocarbon source rocks of Wuerxun and Beier depression in Hailaer Basin are fine description, and carries on the contrast with the ordinary hydrocarbon source rocks. Research shows that; 1) Research area high quality hydrocarbon source rock and sandstone are longitudinal interactive frequently, and the hydrocarbon-expulsion efficiency is high. High quality hydrocarbon source rocks are formative in the reductive-strong reductive environment, however, the ordinary hydrocarbon source rocks are formative in the oxidized-strong oxidized environment. 2) Organic matter of high-quality hydrocarbon source rocks is in the form of occurrence layered enrichment, organic matter in parallel or basic parallel bedding distribution. However, organic matter of the ordinary hydrocarbon source rocks is plaques form, uneven distribution, or intermittent layer; 3) The hydrocarbon generating potential of high-quality hydrocarbon source rocks is high, which is ordinary hydrocarbon source rocks the 10 times above. 4) High-quality hydrocarbon source rocks have the feature of high organic carbon and relatively low chloroform bitumen "A", which reflect research area in mud interbed of sand section of high-quality hydrocarbon source rocks have a high efficiency of hydrocarbon-expulsion.